{"id":1182,"date":"2018-05-28T07:09:15","date_gmt":"2018-05-28T07:09:15","guid":{"rendered":"https:\/\/www.mcctcarbide.com\/research-progress-of-nano-ultrafine-wc-co-cemented-carbides\/"},"modified":"2020-05-04T13:31:39","modified_gmt":"2020-05-04T13:31:39","slug":"research-progress-of-nano-ultrafine-wc-co-cemented-carbides","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/research-progress-of-nano-ultrafine-wc-co-cemented-carbides\/","title":{"rendered":"Ti\u1ebfn \u0111\u1ed9 nghi\u00ean c\u1ee9u c\u1ee7a Nano \/ Ultrafine WC - Cacbua xi m\u0103ng"},"content":{"rendered":"<div class=\"vgblk-rw-wrapper limit-wrapper\">T\u00f3m t\u1eaft: Hai y\u1ebfu t\u1ed1 ch\u00ednh \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf WC \/ si\u00eau m\u1ecbn WC - Cacbua xi m\u0103ng l\u00e0 s\u1ef1 chu\u1ea9n b\u1ecb - S\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a b\u1ed9t nano \/ si\u00eau m\u1ecbn ch\u1ea5t l\u01b0\u1ee3ng cao WC - B\u1ed9t t\u1ed5ng h\u1ee3p v\u00e0 ki\u1ec3m so\u00e1t s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft. Ti\u1ebfn tr\u00ecnh nghi\u00ean c\u1ee9u trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y \u0111\u01b0\u1ee3c xem x\u00e9t to\u00e0n di\u1ec7n v\u1ec1 nano \/ ultrafine WC - Ph\u01b0\u01a1ng ph\u00e1p chu\u1ea9n b\u1ecb b\u1ed9t h\u1ed7n h\u1ee3p v\u00e0 c\u00f4ng ngh\u1ec7 WC \/ ultrafine WC - Co-carbide xi m\u0103ng. Ngo\u00e0i ra, tri\u1ec3n v\u1ecdng ph\u00e1t tri\u1ec3n v\u00e0 tr\u1ecdng t\u00e2m nghi\u00ean c\u1ee9u trong t\u01b0\u01a1ng lai c\u1ee7a WC \/ nano si\u00eau m\u1ecbn - C\u00e1c cacbua xi m\u0103ng \u0111\u1ed3ng c\u0169ng \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn. T\u1eeb kh\u00f3a: cacbua xi m\u0103ng, tinh th\u1ec3 nano \/ si\u00eau m\u1ecbn; WC - Co composite b\u1ed9t; Cacbua l\u00e0 m\u1ed9t h\u1ee3p ch\u1ea5t c\u1ee9ng kim lo\u1ea1i ch\u1ecbu l\u1eeda (ch\u1ee7 y\u1ebfu \u0111\u1ec1 c\u1eadp \u0111\u1ebfn WC, TiC, TaC, NbC, VC, Cr 3 C 2, Mo 2 C, v.v.) l\u00e0 kim lo\u1ea1i c\u1ee9ng v\u00e0 li\u00ean k\u1ebft (ch\u1ee7 y\u1ebfu \u0111\u1ec1 c\u1eadp \u0111\u1ebfn Fe , Co, Ni Vv.) \u0110\u1ed1i v\u1edbi pha ch\u1ea5t k\u1ebft d\u00ednh, m\u1ed9t v\u1eadt li\u1ec7u h\u1ee3p kim \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p luy\u1ec7n kim b\u1ed9t. So v\u1edbi th\u00e9p t\u1ed1c \u0111\u1ed9 cao, kim c\u01b0\u01a1ng, g\u1ed1m s\u1ee9 v\u00e0 c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c, cacbua xi m\u0103ng kh\u00f4ng ch\u1ec9 c\u00f3 \u0111\u1ed9 b\u1ec1n t\u1ed1t m\u00e0 c\u00f2n c\u00f3 \u0111\u1ed9 d\u1ebbo dai tuy\u1ec7t v\u1eddi. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng v\u1eadt li\u1ec7u c\u00f4ng c\u1ee5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t v\u00e0 \u0111\u00f3ng vai tr\u00f2 th\u00fac \u0111\u1ea9y s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p v\u00e0 ph\u00e1t tri\u1ec3n kinh t\u1ebf qu\u1ed1c gia c\u1ee7a Trung Qu\u1ed1c. M\u1ed9t vai tr\u00f2 quy\u1ebft \u0111\u1ecbnh. C\u00e1c cacbua h\u1ea1t nano \/ si\u00eau m\u1ecbn (khi k\u00edch th\u01b0\u1edbc h\u1ea1t WC trung b\u00ecnh trong h\u1ee3p kim l\u00e0 0,1 \u0111\u1ebfn 0,6 \u03bcm) c\u00f3 th\u1ec3 kh\u1eafc ph\u1ee5c hi\u1ec7u qu\u1ea3 s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n gi\u1eefa \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n trong c\u00e1c cacbua xi m\u0103ng th\u00f4ng th\u01b0\u1eddng, c\u0169ng nh\u01b0 \u0111\u1ed9 gi\u00f2n v\u00e0 \u0111\u1ed9 m\u1ec1m l\u1edbn h\u01a1n. V\u1ea5n \u0111\u1ec1 l\u00e0 n\u00f3 c\u00f3 \u0111\u1eb7c t\u00ednh cao g\u1ea5p \u0111\u00f4i \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 d\u1ebbo dai cao. B\u00e2y gi\u1edd n\u00f3 \u0111\u00e3 ph\u00e1t tri\u1ec3n m\u1ed9t lo\u1ea1t c\u00e1c s\u1ea3n ph\u1ea9m cacbua cao c\u1ea5p, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e1y khoan si\u00eau nh\u1ecf \u0111\u1ec3 x\u1eed l\u00fd b\u1ea3ng m\u1ea1ch t\u00edch h\u1ee3p, kim in ma tr\u1eadn \u0111i\u1ec3m, c\u00f4ng c\u1ee5 gia c\u00f4ng l\u1ed7 t\u1ed5ng th\u1ec3 v\u00e0 dao phay. , m\u00e1y khoan nha khoa v\u00e0 khu\u00f4n m\u1eabu ch\u00ednh x\u00e1c, vv, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong ng\u00e0nh h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, gia c\u00f4ng ch\u00ednh x\u00e1c, c\u00f4ng nghi\u1ec7p \u0111i\u1ec7n t\u1eed, s\u1ea3n xu\u1ea5t ch\u00ednh x\u00e1c v\u00e0 c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c. K\u1ec3 t\u1eeb khi ph\u01b0\u01a1ng ph\u00e1p luy\u1ec7n kim b\u1ed9t \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t cacbua xi m\u0103ng, c\u00e1c b\u01b0\u1edbc bao g\u1ed3m chu\u1ea9n b\u1ecb b\u1ed9t, \u00e9p v\u00e0 thi\u00eau k\u1ebft. Do \u0111\u00f3, hai y\u1ebfu t\u1ed1 ch\u00ednh \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf cacbua nano-h\u1ea1t si\u00eau m\u1ecbn WC-Co l\u00e0 b\u1ed9t tinh th\u1ec3 nano \/ si\u00eau m\u1ecbn ch\u1ea5t l\u01b0\u1ee3ng cao. Ki\u1ec3m so\u00e1t s\u1ef1 t\u0103ng tr\u01b0\u1edfng c\u1ee7a h\u1ea1t trong qu\u00e1 tr\u00ecnh chu\u1ea9n b\u1ecb v\u00e0 thi\u00eau k\u1ebft. Trong b\u00e0i b\u00e1o n\u00e0y, vi\u1ec7c t\u1ed5ng h\u1ee3p b\u1ed9t h\u1ed7n h\u1ee3p nano \/ si\u00eau m\u1ecbn WC-Co v\u00e0 k\u1ef9 thu\u1eadt thi\u00eau k\u1ebft cacbua h\u1ea1t nano \/ si\u00eau m\u1ecbn \u0111\u00e3 \u0111\u01b0\u1ee3c xem x\u00e9t v\u00e0 xem x\u00e9t trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y. Ph\u01b0\u01a1ng ph\u00e1p k\u1ebft h\u1ee3p c\u1ee7a b\u1ed9t composite WC-Co 1 nano \/ si\u00eau m\u1ecbn Ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n th\u1ed1ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t WC- B\u1ed9t h\u1ed7n h\u1ee3p nh\u01b0 sau: 1) WO 3 thu \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch gi\u1ea3m hydro trong kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 700-900 \u00b0 C \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t W; 2) B\u1ed9t W v\u00e0 b\u1ed9t C \u0111\u01b0\u1ee3c tr\u1ed9n trong kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 1400 \u0111\u1ebfn 1 600 \u00b0 C. Carbonized \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t WC; 3) B\u1ed9t WC v\u00e0 b\u1ed9t Co \u0111\u01b0\u1ee3c tr\u1ed9n \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t composite WC-Co. Ph\u01b0\u01a1ng ph\u00e1p quy tr\u00ecnh truy\u1ec1n th\u1ed1ng kh\u00f4ng ph\u1ea3i l\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u00fd t\u01b0\u1edfng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf b\u1ed9t h\u1ed7n h\u1ee3p nano \/ si\u00eau m\u1ecbn WC-Co, v\u00e0 c\u00f3 nhi\u1ec1u nh\u01b0\u1ee3c \u0111i\u1ec3m. Tr\u01b0\u1edbc h\u1ebft, nhi\u1ec7t \u0111\u1ed9 cacbon h\u00f3a cao c\u1ee7a b\u1ed9t W v\u00e0 C c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng g\u00e2y ra s\u1ef1 t\u0103ng tr\u01b0\u1edfng h\u1ea1t c\u1ee7a b\u1ed9t v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh \u0111\u1ed3ng nh\u1ea5t c\u1ee7a ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t. Th\u1ee9 hai, c\u00f3 nhi\u1ec1u y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng b\u1ed9t trong quy tr\u00ecnh truy\u1ec1n th\u1ed1ng, v\u00e0 r\u1ea5t kh\u00f3 ki\u1ec3m so\u00e1t t\u00ednh ch\u1ea5t c\u1ee7a b\u1ed9t. Cu\u1ed1i c\u00f9ng, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n th\u1ed1ng Quy tr\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 chu tr\u00ecnh d\u00e0i, chi ph\u00ed s\u1ea3n xu\u1ea5t cao. Sau g\u1ea7n 20 n\u0103m ph\u00e1t tri\u1ec3n, nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p chu\u1ea9n b\u1ecb b\u1ed9t h\u1ed7n h\u1ee3p nano \/ si\u00eau m\u1ecbn m\u1edbi \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n d\u01b0\u1edbi nh\u1eefng n\u1ed7 l\u1ef1c kh\u00f4ng ng\u1eebng ngh\u1ec9 c\u1ee7a c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u tr\u00ean th\u1ebf gi\u1edbi. Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i ch\u00ednh: c\u00e1ch ti\u1ebfp c\u1eadn t\u1eeb tr\u00ean xu\u1ed1ng v\u00e0 t\u1ef1 t\u1eeb d\u01b0\u1edbi l\u00ean. Ph\u01b0\u01a1ng ph\u00e1p t\u1eeb d\u01b0\u1edbi l\u00ean d\u00f9ng \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t tinh th\u1ec3 nano \/ si\u00eau m\u1ecbn t\u1eeb c\u1ea5p \u0111\u1ed9 nguy\u00ean t\u1eed ho\u1eb7c ph\u00e2n t\u1eed, ch\u1ee7 y\u1ebfu bao g\u1ed3m ph\u01b0\u01a1ng ph\u00e1p dung d\u1ecbch (ph\u01b0\u01a1ng ph\u00e1p sol-gel, ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed3ng k\u1ebft t\u1ee7a, ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i s\u1ea5y phun) v\u00e0 t\u1ed5ng h\u1ee3p pha kh\u00ed . Lu\u1eadt v\u00e0 nh\u01b0 v\u1eady. Ph\u01b0\u01a1ng ph\u00e1p t\u1eeb tr\u00ean xu\u1ed1ng \u0111\u1ec1 c\u1eadp \u0111\u1ebfn vi\u1ec7c thu \u0111\u01b0\u1ee3c b\u1ed9t tinh th\u1ec3 nano \/ si\u00eau m\u1ecbn t\u1eeb c\u00e1c quan \u0111i\u1ec3m v\u0129 m\u00f4 nh\u01b0 c\u00e1c h\u1ea1t l\u1edbn. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh bao g\u1ed3m nghi\u1ec1n b\u00f3ng n\u0103ng l\u01b0\u1ee3ng cao v\u00e0 t\u01b0\u01a1ng t\u1ef1.Fig.1 K\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a cacbua tinh th\u1ec3 nano WC-7Co v\u00e0 WC-10Co1. 1 Phay b\u00f3ng n\u0103ng l\u01b0\u1ee3ng cao Phay b\u00f3ng n\u0103ng l\u01b0\u1ee3ng cao c\u00f3 \u0111i\u1ec1u ki\u1ec7n li\u00ean quan \u0111\u1ebfn vi\u1ec7c n\u1ea1p b\u1ed9t nguy\u00ean li\u1ec7u th\u00f4 v\u00e0 nghi\u1ec1n bi v\u00e0o b\u1ec3 nghi\u1ec1n bi theo t\u1ef7 l\u1ec7 nh\u1ea5t \u0111\u1ecbnh v\u00e0 \u0111\u01b0a kh\u00ed tr\u01a1 v\u00e0o \u0111\u1ec3 \u00e9p b\u1ed9t ph\u1ea3i tr\u1ea3i qua qu\u00e1 tr\u00ecnh t\u00e1c \u0111\u1ed9ng c\u1ee7a bi m\u00e0i - h\u00e0n l\u1ea1nh - quy tr\u00ecnh nghi\u1ec1n \u0111\u1ec3 tinh ch\u1ebf h\u1ea1t Chu\u1ea9n b\u1ecb b\u1ed9t h\u1ed7n h\u1ee3p nano \/ si\u00eau m\u1ecbn WC-Co. EL-ESKANDARANY MS s\u1eed d\u1ee5ng b\u1ed9t W (d &lt;196 \u03bc m) v\u00e0 b\u1ed9t C (d &lt;45 \u03bc m) l\u00e0m nguy\u00ean li\u1ec7u, s\u1eed d\u1ee5ng qu\u1ea3 b\u00f3ng th\u00e9p l\u00e0m ph\u01b0\u01a1ng ti\u1ec7n nghi\u1ec1n bi v\u00e0 thu \u0111\u01b0\u1ee3c qu\u1ea3 b\u00f3ng nghi\u1ec1n ho\u00e0n to\u00e0n v\u1edbi t\u1ef7 l\u1ec7 v\u1eadt li\u1ec7u b\u00f3ng l\u00e0 10: 1 trong 120 gi\u1edd. B\u1ed9t Nano WC. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n bi n\u0103ng l\u01b0\u1ee3ng cao \u0111\u1ec3 s\u1ea3n xu\u1ea5t b\u1ed9t composite WC \/ Co si\u00eau m\u1ecbn c\u00f3 nh\u1eefng nh\u01b0\u1ee3c \u0111i\u1ec3m v\u1ec1 th\u1eddi gian nghi\u1ec1n b\u00f3ng d\u00e0i, b\u1ed9t kh\u00f4ng tinh khi\u1ebft sau khi xay v\u00e0 hi\u1ec7u qu\u1ea3 c\u00f4ng vi\u1ec7c th\u1ea5p. \u0110\u1ec3 kh\u1eafc ph\u1ee5c nh\u1eefng thi\u1ebfu s\u00f3t c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n bi n\u0103ng l\u01b0\u1ee3ng cao truy\u1ec1n th\u1ed1ng, b\u00f3ng cacbua th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m qu\u1ea3 b\u00f3ng nghi\u1ec1n \u0111\u1ec3 gi\u1ea3m s\u1ef1 nhi\u1ec5m b\u1ea9n c\u1ee7a b\u1ed9t. \u0110\u1ed3ng th\u1eddi, m\u1ed9t s\u1ed1 quy tr\u00ecnh nghi\u1ec1n b\u00f3ng n\u0103ng l\u01b0\u1ee3ng cao m\u1edbi c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n, ch\u1eb3ng h\u1ea1n nh\u01b0 Nh\u00e0 m\u00e1y h\u00e0nh tinh \u1ed5 \u0111\u0129a k\u00e9p n\u0103ng l\u01b0\u1ee3ng cao, T\u1ed5ng h\u1ee3p h\u00f3a h\u1ecdc c\u01a1 h\u1ecdc v\u00e0 K\u00edch ho\u1ea1t nhi\u1ec7t c\u01a1 h\u1ecdc v\u00e0 t\u00edch h\u1ee3p. M\u00e1y nghi\u1ec1n bi h\u00e0nh tinh k\u00e9p n\u0103ng l\u01b0\u1ee3ng cao ch\u1ee7 y\u1ebfu k\u1ebft h\u1ee3p v\u00f2ng quay v\u00e0 v\u00f2ng quay c\u1ee7a th\u00f9ng m\u00e1y nghi\u1ec1n, v\u00e0 t\u0103ng hi\u1ec7u qu\u1ea3 th\u00f4ng qua tr\u01b0\u1eddng gia t\u1ed1c tr\u1ecdng l\u1ef1c \u0111\u01b0\u1ee3c t\u1ea1o ra trong qu\u00e1 tr\u00ecnh nghi\u1ec1n bi. BUTLER BG v\u00e0 c\u1ed9ng s\u1ef1. \u0111\u00e3 s\u1eed d\u1ee5ng m\u00e1y nghi\u1ec1n bi h\u00e0nh tinh \u1ed5 \u0111\u0129a k\u00e9p n\u0103ng l\u01b0\u1ee3ng cao \u0111\u1ec3 gi\u1ea3m k\u00edch th\u01b0\u1edbc h\u1ea1t 0,8 mm b\u1ed9t WC v\u00e0 b\u1ed9t WC-Co xu\u1ed1ng 10-20nm ch\u1ec9 trong 10 gi\u1edd. T\u1ed5ng h\u1ee3p h\u00f3a h\u1ecdc \u0111\u1ec1 c\u1eadp \u0111\u1ebfn vi\u1ec7c gi\u1edbi thi\u1ec7u c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc trong qu\u00e1 tr\u00ecnh nghi\u1ec1n bi, t\u1eeb \u0111\u00f3 r\u00fat ng\u1eafn th\u1eddi gian xay x\u00e1t v\u00e0 n\u00e2ng cao hi\u1ec7u qu\u1ea3 xay x\u00e1t. Qu\u00e1 tr\u00ecnh t\u1ed5ng h\u1ee3p h\u00f3a h\u1ecdc ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c chia th\u00e0nh hai b\u01b0\u1edbc: b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean l\u00e0 s\u1eed d\u1ee5ng c\u00e1c kim lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng nh\u01b0 Mg v\u00e0 Zn l\u00e0m ch\u1ea5t kh\u1eed, v\u00e0 mu\u1ed9i than v\u00e0 m\u1ed9t s\u1ed1 ch\u1ea5t h\u1eefu c\u01a1 ch\u1ee9a carbon l\u00e0m ch\u1ea5t cacbon h\u00f3a \u0111\u01b0\u1ee3c th\u00eam v\u00e0o b\u1ec3 nghi\u1ec1n bi c\u00f9ng v\u1edbi WO 3. Do qu\u00e1 tr\u00ecnh nghi\u1ec1n bi t\u1ea1o ra m\u1ed9t l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng l\u1edbn, tr\u01b0\u1edbc ti\u00ean WO3 ph\u1ea3n \u1ee9ng v\u1edbi kim lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 t\u1ea1o th\u00e0nh W, sau \u0111\u00f3 C ph\u1ea3n \u1ee9ng v\u1edbi W \u0111\u1ec3 t\u1ea1o ra nano-WC. B\u01b0\u1edbc th\u1ee9 hai l\u00e0 \u0111\u01b0a b\u1ed9t thu \u0111\u01b0\u1ee3c sau khi nghi\u1ec1n b\u00f3ng ho\u00e0n th\u00e0nh v\u00e0o dung d\u1ecbch axit nh\u01b0 HCl \u0111\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c oxit kim lo\u1ea1i \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t nano WC nguy\u00ean ch\u1ea5t. HO-SEINPUR A et al. \u0111\u1eb7t WO3, Zn v\u00e0 C v\u00e0o b\u1ec3 nghi\u1ec1n bi v\u00e0 sau khi nghi\u1ec1n bi trong 36 gi\u1edd, b\u1ed9t thu \u0111\u01b0\u1ee3c \u0111\u01b0\u1ee3c ng\u00e2m trong axit clohydric lo\u00e3ng trong 2 gi\u1edd \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t WC kho\u1ea3ng 20nm. Ph\u01b0\u01a1ng ph\u00e1p t\u1ed5ng h\u1ee3p k\u00edch ho\u1ea1t nhi\u1ec7t c\u01a1 h\u1ecdc l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u1edbi k\u1ebft h\u1ee3p qu\u00e1 tr\u00ecnh nghi\u1ec1n bi v\u1edbi qu\u00e1 tr\u00ecnh kh\u1eed cacbon. T\u00ednh n\u0103ng ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 t\u1eadn d\u1ee5ng t\u1ed1i \u0111a b\u1ec1 m\u1eb7t ho\u1ea1t \u0111\u1ed9ng cao \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi qu\u00e1 tr\u00ecnh nghi\u1ec1n bi n\u0103ng l\u01b0\u1ee3ng cao \u0111\u1ec3 gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 cacbon h\u00f3a, v\u00e0 chu\u1ea9n b\u1ecb b\u1ed9t composite nano \/ Ultrafine WC-Co. SHAWLL v\u00e0 c\u1ee9 th\u1ebf v\u1edbi 1: 2.4: 0. 7 (t\u1ef7 l\u1ec7 mol) Oxit vonfram, than ch\u00ec v\u00e0 oxit coban 20 m \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o m\u00e1y nghi\u1ec1n bi trong 6 gi\u1edd nghi\u1ec1n b\u00f3ng n\u0103ng l\u01b0\u1ee3ng cao, v\u00e0 sau \u0111\u00f3 b\u1ed9t thu \u0111\u01b0\u1ee3c \u0111\u00e3 b\u1ecb ph\u1ea3n \u1ee9ng cacbon h\u00f3a \u1edf 1 000 \u00b0 C trong kh\u00ed argon b\u1ea3o v\u1ec7 \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c tinh th\u1ec3. B\u1ed9t composite WC-Co c\u00f3 k\u00edch th\u01b0\u1edbc h\u1ea1t t\u1eeb 80 \u0111\u1ebfn 200nm. Nh\u00f3m c\u1ee7a Song Xiaoyan \u0111\u00e3 ph\u00e1t minh l\u1ea1i ph\u01b0\u01a1ng ph\u00e1p t\u1ed5ng h\u1ee3p k\u00edch ho\u1ea1t nhi\u1ec7t c\u01a1 h\u1ecdc truy\u1ec1n th\u1ed1ng v\u00e0 \u0111\u01b0a oxit h\u1ee3p ch\u1ea5t thu \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch nghi\u1ec1n bi v\u00e0o l\u00f2 ch\u00e2n kh\u00f4ng \u0111\u1ec3 t\u1ed5ng h\u1ee3p cacbon h\u00f3a t\u1ea1i ch\u1ed7 c\u1ee7a b\u1ed9t composite WC-Co si\u00eau m\u1ecbn. S\u1ef1 ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t v\u00e0 th\u00e0nh ph\u1ea7n c\u1ee7a b\u1ed9t \u0111\u00e3 chu\u1ea9n b\u1ecb l\u00e0 \u0111\u1ed3ng nh\u1ea5t v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t dao \u0111\u1ed9ng t\u1eeb 70 \u0111\u1ebfn 500nm.Fig. 2 H\u00ecnh \u1ea3nh SEM m\u00e0i m\u00f2n b\u1ec1 m\u1eb7t c\u1ee7a cacbua nano v\u00e0 cacbua xi m\u0103ng th\u00f4ng th\u01b0\u1eddng1. 2 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i ph\u00e1p Trong ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i ph\u00e1p, mu\u1ed1i vonfram h\u00f2a tan, mu\u1ed1i coban v\u00e0 c\u00e1c nguy\u00ean li\u1ec7u th\u00f4 kh\u00e1c \u0111\u01b0\u1ee3c th\u00eam v\u00e0o dung d\u1ecbch \u0111\u1ec3 ph\u00e2n t\u00e1n n\u00f3 \u1edf c\u1ea5p \u0111\u1ed9 nguy\u00ean t\u1eed ho\u1eb7c ph\u00e2n t\u1eed, v\u00e0 b\u1ed9t ti\u1ec1n ch\u1ea5t \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p c\u1ee5 th\u1ec3; v\u00e0 sau \u0111\u00f3 b\u1ed9t ti\u1ec1n ch\u1ea5t \u0111\u01b0\u1ee3c s\u1ea5y kh\u00f4, kh\u1eed, cacbon h\u00f3a, vv \u0111\u1ec3 chu\u1ea9n b\u1ecb m\u1ed9t nanomet. \/ B\u1ed9t composite WC-Co h\u1ea1t si\u00eau m\u1ecbn. Trong b\u1ed9t ti\u1ec1n ch\u1ea5t thu \u0111\u01b0\u1ee3c b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p dung d\u1ecbch, m\u1ed7i pha \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 t\u1ed3n t\u1ea1i \u1edf c\u1ea5p \u0111\u1ed9 ph\u00e2n t\u1eed v\u00e0 nguy\u00ean t\u1eed, v\u00e0 c\u00f3 ho\u1ea1t t\u00ednh h\u00f3a h\u1ecdc cao, c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 v\u00e0 cacbon h\u00f3a, r\u00fat ng\u1eafn th\u1eddi gian chu\u1ea9n b\u1ecb v\u00e0 \u01b0u ti\u00ean nano \/ tinh th\u1ec3 si\u00eau m\u1ecbn. Chu\u1ea9n b\u1ecb b\u1ed9t h\u1ed7n h\u1ee3p WC-Co. Ph\u01b0\u01a1ng ph\u00e1p dung d\u1ecbch c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh ph\u01b0\u01a1ng ph\u00e1p sol-gel, ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed3ng k\u1ebft t\u1ee7a v\u00e0 ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i s\u1ea5y phun theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t ti\u1ec1n ch\u1ea5t. Ph\u01b0\u01a1ng ph\u00e1p sol-gel l\u00e0 ph\u01b0\u01a1ng ph\u00e1p d\u1ea7n d\u1ea7n h\u00ecnh th\u00e0nh ti\u1ec1n ch\u1ea5t keo nh\u1edbt b\u1eb1ng qu\u00e1 tr\u00ecnh th\u1ee7y ph\u00e2n v\u00e0 polycondensation mu\u1ed1i h\u00f2a tan, sau \u0111\u00f3 s\u1ea5y kh\u00f4 v\u00e0 thi\u00eau k\u1ebft \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t h\u1ed7n h\u1ee3p tinh th\u1ec3 nano \/ si\u00eau m\u1ecbn. HOLGATE MWR s\u1eed d\u1ee5ng mu\u1ed1i vonfram, mu\u1ed1i coban v\u00e0 carbon h\u1eefu c\u01a1 h\u00f2a tan l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 \u0111\u1ec3 thu \u0111\u01b0\u1ee3c ti\u1ec1n ch\u1ea5t gi\u1ed1ng nh\u01b0 gel b\u1eb1ng c\u00e1ch ki\u1ec3m so\u00e1t c\u00e1c \u0111i\u1ec1u ki\u1ec7n t\u1ed5ng h\u1ee3p nh\u01b0 gi\u00e1 tr\u1ecb pH c\u1ee7a dung d\u1ecbch, sau \u0111\u00f3 thu \u0111\u01b0\u1ee3c b\u1ed9t composite nano-WC-Co th\u00f4ng qua s\u1ea5y kh\u00f4, qu\u00e1 tr\u00ecnh kh\u1eed cacbon v\u00e0 cacbon h\u00f3a. Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed3ng k\u1ebft t\u1ee7a l\u00e0 chu\u1ea9n b\u1ecb ph\u00e2n t\u00e1n t\u1ed1t ti\u1ec1n ch\u1ea5t h\u1ed7n h\u1ee3p vonfram-coban b\u1eb1ng c\u00e1ch k\u1ebft t\u1ee7a mu\u1ed1i vonfram v\u00e0 mu\u1ed1i coban trong pha l\u1ecfng, sau \u0111\u00f3 chu\u1ea9n b\u1ecb h\u1ed7n h\u1ee3p WC \/ Co si\u00eau m\u1ecbn b\u1ed9t b\u1eb1ng c\u00e1ch kh\u1eed cacbon h\u00f3a. MAJH v.v ch\u1ee9a 66% W (ph\u1ea7n kh\u1ed1i l\u01b0\u1ee3ng, gi\u1ed1ng nh\u01b0 b\u00ean d\u01b0\u1edbi) mu\u1ed1i vonfram v\u00e0 ch\u1ee9a 14. Mu\u1ed1i coban c\u1ee7a 42% Co \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 v\u00e0 b\u1ed9t ti\u1ec1n ch\u1ea5t h\u1ed7n h\u1ee3p vonfram \/ coban \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p k\u1ebft t\u1ee7a h\u00f3a h\u1ecdc , ti\u1ebfp theo l\u00e0 kh\u1eed H 2 v\u00e0 cacbon h\u00f3a trong kh\u00ed quy\u1ec3n CO \/ CO 2 \u0111\u1ec3 thu \u0111\u01b0\u1ee3c h\u1ea1t nano c\u00f3 k\u00edch th\u01b0\u1edbc h\u1ea1t kho\u1ea3ng 50nm \/ b\u1ed9t Ultrafine WC-Co. Trong ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i s\u1ea5y phun, mu\u1ed1i vonfram h\u00f2a tan, mu\u1ed1i coban, vv \u0111\u01b0\u1ee3c h\u00f2a tan trong dung d\u1ecbch \u0111\u01b0\u1ee3c s\u1ea5y phun \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t ti\u1ec1n ch\u1ea5t h\u1ed7n h\u1ee3p vonfram-coban, v\u00e0 sau \u0111\u00f3 thu \u0111\u01b0\u1ee3c b\u1ed9t composite WC-Co \u1edf quy m\u00f4 nano th\u00f4ng qua c\u00e1c b\u01b0\u1edbc kh\u1eed v\u00e0 cacbon h\u00f3a. Ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i phun \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t \u0111\u1ea7u ti\u00ean b\u1edfi \u0110\u1ea1i h\u1ecdc Rutgers v\u00e0 quy tr\u00ecnh c\u1ee5 th\u1ec3 c\u1ee7a n\u00f3 bao g\u1ed3m ba b\u01b0\u1edbc: 1) H\u00f2a tan mu\u1ed1i vonfram h\u00f2a tan v\u00e0 mu\u1ed1i coban trong n\u01b0\u1edbc c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao \u0111\u1ec3 thu \u0111\u01b0\u1ee3c dung d\u1ecbch n\u01b0\u1edbc \u0111\u1ed3ng nh\u1ea5t; 2) X\u1ecbt kh\u00f4 dung d\u1ecbch n\u01b0\u1edbc. Ch\u1ea5t tan trong dung m\u00f4i \u0111\u01b0\u1ee3c k\u1ebft tinh nhanh ch\u00f3ng t\u1ea1o th\u00e0nh b\u1ed9t ti\u1ec1n ch\u1ea5t ph\u00e2n b\u1ed1 \u0111\u1ec1u \u1edf c\u1ea5p \u0111\u1ed9 ph\u00e2n t\u1eed; 3) B\u1ed9t ti\u1ec1n ch\u1ea5t b\u1ecb kh\u1eed trong kh\u00ed quy\u1ec3n H 2, sau \u0111\u00f3 l\u00e0 ph\u1ea3n \u1ee9ng cacbon h\u00f3a trong m\u1ed9t t\u1ea7ng s\u00f4i d\u01b0\u1edbi b\u1ea7u kh\u00ed quy\u1ec3n CO \/ CO 2. M\u1ed9t h\u1ed7n h\u1ee3p b\u1ed9t nano-si\u00eau m\u1ecbn WC-Co \u0111\u00e3 thu \u0111\u01b0\u1ee3c. V\u00ec c\u00f4ng ngh\u1ec7 s\u1ea5y phun v\u00e0 c\u00f4ng ngh\u1ec7 x\u1eed l\u00fd nhi\u1ec7t t\u1ea7ng s\u00f4i l\u00e0 c\u00f4ng ngh\u1ec7 s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p, n\u00f3 l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 c\u00f3 tri\u1ec3n v\u1ecdng \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p. Nh\u00f3m Yang Jiangao \u0111\u00e3 t\u00edch h\u1ee3p v\u00e0 ph\u00e1t minh l\u1ea1i ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i s\u1ea5y phun truy\u1ec1n th\u1ed1ng, t\u1eeb b\u1ecf thi\u1ebft b\u1ecb t\u1ea7ng s\u00f4i ph\u1ee9c t\u1ea1p v\u00e0 chuy\u1ec3n sang gi\u01b0\u1eddng c\u1ed1 \u0111\u1ecbnh, v\u00e0 ph\u00e1t tri\u1ec3n m\u1ed9t c\u00f4ng ngh\u1ec7 chu\u1ea9n b\u1ecb m\u1edbi cho b\u1ed9t h\u1ed7n h\u1ee3p v\u1edbi tr\u1ed9n l\u1edbp ion, k\u1ebft t\u1ee7a nhanh v\u00e0 t\u1ed5ng h\u1ee3p nhi\u1ec7t \u0111\u1ed9 th\u1ea5p M\u00f9i. Ngo\u00e0i ra, m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u1ed9t b\u01b0\u1edbc c\u1ee7a ph\u1ea3n \u1ee9ng nhi\u1ec7t carbon v\u00e0 carbon ho\u1ea1t \u0111\u1ed9ng cao \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ebf b\u1ed9t h\u1ed7n h\u1ee3p nano \/ si\u00eau m\u1ecbn WC-Co. Carbon ho\u1ea1t \u0111\u1ed9ng cao ph\u00e2n t\u00e1n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 l\u00e0m gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 ph\u1ea3n \u1ee9ng v\u00e0 r\u00fat ng\u1eafn th\u1eddi gian ph\u1ea3n \u1ee9ng \u0111\u1ec3 \u1ee9c ch\u1ebf c\u00e1c h\u1ea1t tinh th\u1ec3. L\u1edbn l\u00ean, m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p chu\u1ea9n b\u1ecb b\u1ed9t \u0111\u01a1n gi\u1ea3n, nhanh, chi ph\u00ed th\u1ea5p, s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t \u0111\u1ec3 chu\u1ea9n b\u1ecb b\u1ed9t h\u1ed7n h\u1ee3p nano \/ si\u00eau m\u1ecbn WC-Co v\u1edbi c\u1ea5u tr\u00fac v\u00e0 hi\u1ec7u su\u1ea5t \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t tinh th\u1ec3 WC d\u01b0\u1edbi 100nm. T\u1eeb 8 b\u01b0\u1edbc truy\u1ec1n th\u1ed1ng xu\u1ed1ng c\u00f2n 3 b\u01b0\u1edbc, nhi\u1ec7t \u0111\u1ed9 cacbon h\u00f3a gi\u1ea3m t\u1eeb 1300 \u00b0 C xu\u1ed1ng 1000 \u00b0 C.1 th\u00f4ng th\u01b0\u1eddng. Ph\u01b0\u01a1ng ph\u00e1p t\u1ed5ng h\u1ee3p ph\u1ea3n \u1ee9ng pha kh\u00ed 3 Ph\u01b0\u01a1ng ph\u00e1p t\u1ed5ng h\u1ee3p ph\u1ea3n \u1ee9ng pha kh\u00ed l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ebf b\u1ed9t si\u00eau m\u1ecbn trong \u0111\u00f3 kh\u00ed ti\u1ec1n ch\u1ea5t si\u00eau b\u00e3o h\u00f2a kh\u00f4ng \u1ed5n \u0111\u1ecbnh v\u1ec1 m\u1eb7t nhi\u1ec7t h\u1ecdc tr\u1ea3i qua ph\u1ea3n \u1ee9ng v\u1eadt l\u00fd ho\u1eb7c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc \u1edf tr\u1ea1ng th\u00e1i kh\u00ed v\u00e0 k\u1ebft t\u1ee5 v\u00e0 ph\u00e1t tri\u1ec3n trong qu\u00e1 tr\u00ecnh l\u00e0m l\u1ea1nh. . Theo ph\u01b0\u01a1ng ph\u00e1p ti\u1ec1n ch\u1ea5t b\u00e3o h\u00f2a kh\u00f4ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9ng, ph\u01b0\u01a1ng ph\u00e1p t\u1ed5ng h\u1ee3p h\u01a1i h\u00f3a h\u1ecdc c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh ph\u01b0\u01a1ng ph\u00e1p c\u1eaft \u0111\u1ed1t b\u1eb1ng laser, ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i tia l\u1eeda, ph\u01b0\u01a1ng ph\u00e1p ph\u00fan x\u1ea1 ion, ph\u01b0\u01a1ng ph\u00e1p t\u1ed5ng h\u1ee3p ng\u1ecdn l\u1eeda, ph\u01b0\u01a1ng ph\u00e1p h\u01a1i h\u00f3a h\u1ecdc v\u00e0 ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i plasma nhi\u1ec7t . Hi\u1ec7n nay, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf b\u1ed9t composite nano-WC-Co bao g\u1ed3m l\u1eafng \u0111\u1ecdng h\u01a1i h\u00f3a h\u1ecdc v\u00e0 chuy\u1ec3n \u0111\u1ed5i plasma nhi\u1ec7t. Trong ph\u01b0\u01a1ng ph\u00e1p h\u01a1i h\u00f3a h\u1ecdc, b\u1ed9t composite nano-WC-Co \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng c\u00e1ch chuy\u1ec3n qua ti\u1ec1n ch\u1ea5t kh\u00ed h\u00f3a v\u00e0 kh\u1eed cacbon kh\u00ed v\u00e0o l\u00f2 ph\u1ea3n \u1ee9ng t\u01b0\u1eddng n\u00f3ng. Clorua kim lo\u1ea1i l\u00e0 v\u1eadt li\u1ec7u ti\u1ec1n ch\u1ea5t l\u00fd t\u01b0\u1edfng do nhi\u1ec7t \u0111\u1ed9 bay h\u01a1i th\u1ea5p h\u01a1n. RYUT et al. \u0111\u00e3 s\u1eed d\u1ee5ng WCl 6 v\u00e0 CoCl 2 l\u00e0m ti\u1ec1n ch\u1ea5t, H 2 v\u00e0 CH 4 l\u00e0m kh\u00ed kh\u1eed v\u00e0 cacbon h\u00f3a, v\u00e0 kh\u00ed Ar l\u00e0m kh\u00ed mang \u0111\u1ec3 thu \u0111\u01b0\u1ee3c th\u00e0nh c\u00f4ng b\u1ed9t h\u1ed7n h\u1ee3p nano-WC-Co v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t (24 \u00b1 1) nm. Trong qu\u00e1 tr\u00ecnh chu\u1ea9n b\u1ecb, \u0111\u1ec3 tr\u00e1nh s\u1ef1 h\u00ecnh th\u00e0nh c\u00e1c pha thi\u1ebfu carbon nh\u01b0 Co3W3C, WCl6 v\u00e0 CoCl2, \u0111\u01b0\u1ee3c cho \u0103n \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00f2 ph\u1ea3n \u1ee9ng 440 v\u00e0 1400 \u00b0 C, v\u00e0 g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 pha thi\u1ebfu carbon trong h\u1ed7n h\u1ee3p k\u1ebft qu\u1ea3 b\u1ed9t. Ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i plasma n\u00f3ng l\u00e0 ph\u01b0\u01a1ng ph\u00e1p trong \u0111\u00f3 plasma \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ngu\u1ed3n nhi\u1ec7t, v\u00e0 ti\u1ec1n ch\u1ea5t kh\u00ed h\u00f3a v\u00e0 kh\u00ed carbon h\u00f3a kh\u1eed \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh c\u00e1c m\u1ee9c nguy\u00ean t\u1eed \u0111\u1ec3 th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh kh\u1eed v\u00e0 cacbon h\u00f3a l\u1eabn nhau \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t h\u1ed7n h\u1ee3p. SOHN HY v\u00e0 c\u1ed9ng s\u1ef1. \u0111\u00e3 s\u1eed d\u1ee5ng WCl 6, AMT v\u00e0 C 2 H 4 l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 \u0111\u1ec3 th\u1ef1c hi\u1ec7n chuy\u1ec3n \u0111\u1ed5i plasma nhi\u1ec7t trong thi\u1ebft b\u1ecb plasma c\u1ea3m \u1ee9ng \u0111\u1ec3 chu\u1ea9n b\u1ecb b\u1ed9t WC1-x 30nm, sau \u0111\u00f3 l\u00e0 m\u00f4i tr\u01b0\u1eddng H 2 \/ CH 4 \u1edf nhi\u1ec7t \u0111\u1ed9 900 \u00b0 C. X\u1eed l\u00fd nhi\u1ec7t \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 thu \u0111\u01b0\u1ee3c b\u1ed9t WC nguy\u00ean ch\u1ea5t 100nm.2 C\u00f4ng ngh\u1ec7 thi\u00eau k\u1ebft cacbua cacbua nano \/ Ultrafine WC-Co Li\u00ean k\u1ebft l\u00e0 b\u01b0\u1edbc cu\u1ed1i c\u00f9ng trong qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ebf cacbua xi m\u0103ng. Qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft c\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u su\u1ea5t s\u1ea3n ph\u1ea9m v\u00e0 s\u1ef1 thay \u0111\u1ed5i n\u00e0y l\u00e0 kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c, v\u00e0 do \u0111\u00f3 \u0111\u00f3ng vai tr\u00f2 quy\u1ebft \u0111\u1ecbnh trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t cacbua xi m\u0103ng. \u0110\u1ed1i v\u1edbi cacbua xi m\u0103ng nano-ultrafine, qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u0111\u1eadm \u0111\u1eb7c c\u1ee7a xi m\u0103ng cacbua, nh\u01b0ng c\u0169ng ki\u1ec3m so\u00e1t h\u00e0nh vi t\u0103ng tr\u01b0\u1edfng c\u1ee7a c\u00e1c h\u1ea1t trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft. So v\u1edbi b\u1ed9t k\u00edch th\u01b0\u1edbc th\u00f4ng th\u01b0\u1eddng, b\u1ed9t composite nano \/ si\u00eau m\u1ecbn WC-Co th\u1ec3 hi\u1ec7n h\u00e0nh vi thi\u00eau k\u1ebft \u0111\u1eb7c bi\u1ec7t do hi\u1ec7u \u1ee9ng k\u00edch th\u01b0\u1edbc nh\u1ecf, hi\u1ec7u \u1ee9ng b\u1ec1 m\u1eb7t v\u00e0 giao di\u1ec7n v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c. \u0110\u1ed9ng l\u1ef1c nhi\u1ec7t \u0111\u1ed9ng c\u1ee7a qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft ch\u1ee7 y\u1ebfu l\u00e0 gi\u1ea3m n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t, nh\u01b0ng b\u1ed9t composite WC-Co nano \/ si\u00eau m\u1ecbn c\u00f3 n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t l\u1edbn v\u00e0 \u0111\u1ed9ng l\u1ef1c l\u1edbn \u0111\u1ec3 thi\u00eau k\u1ebft, v\u00e0 qu\u00e1 tr\u00ecnh c\u00f4 \u0111\u1eb7c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf m\u1ee9c th\u1ea5p h\u01a1n nhi\u1ec7t \u0111\u1ed9. \u0110\u1ed3ng th\u1eddi, b\u1ed9t h\u1ed7n h\u1ee3p nano \/ si\u00eau m\u1ecbn WC-Co c\u00f3 ho\u1ea1t t\u00ednh cao v\u00e0 ch\u00fang d\u1ec5 b\u1ecb k\u1ebft t\u1ee5 c\u00e1c h\u1ea1t tinh th\u1ec3 trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft v\u00e0 qu\u00e1 tr\u00ecnh h\u00f2a tan, l\u00e0m cho h\u1ea1t r\u1ea5t d\u1ec5 ph\u00e1t tri\u1ec3n. MA-HESHWARIP et al. \u0111\u00e3 nghi\u00ean c\u1ee9u h\u00e0nh vi c\u00f4 \u0111\u1eb7c c\u1ee7a b\u1ed9t composite nano \/ si\u00eau m\u1ecbn WC-Co v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc h\u1ea1t kh\u00e1c nhau trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft. WANG X et al. \u0111\u00e3 s\u1eed d\u1ee5ng WC-10Co (ph\u1ea7n kh\u1ed1i l\u01b0\u1ee3ng) v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t 10nm l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 v\u00e0 thi\u00eau k\u1ebft n\u00f3 trong l\u00f2 ch\u00e2n kh\u00f4ng \u0111\u1ec3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn s\u1ef1 t\u0103ng tr\u01b0\u1edfng c\u1ee7a h\u1ea1t. K\u1ebft qu\u1ea3 cho th\u1ea5y s\u1ef1 gia t\u0103ng nhi\u1ec7t \u0111\u1ed9 g\u00e2y ra s\u1ef1 gia t\u0103ng \u0111\u00e1ng k\u1ec3 v\u1ec1 chi\u1ec1u d\u00e0i h\u1ea1t. Nhi\u1ec7t \u0111\u1ed9 c\u00e0ng l\u1edbn th\u00ec m\u1ee9c t\u0103ng c\u00e0ng cao. Khi nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft l\u00e0 1 300 \u00b0 C, k\u00edch th\u01b0\u1edbc h\u1ea1t t\u0103ng t\u1eeb 10nm l\u00ean kho\u1ea3ng 380nm, t\u0103ng g\u1ea5p 38 l\u1ea7n. FANGZG v\u00e0 c\u1ed9ng s\u1ef1. nh\u1eadn th\u1ea5y r\u1eb1ng trong 5 ph\u00fat \u0111\u1ea7u ti\u00ean thi\u00eau k\u1ebft, thu\u1ed1c nano \u0111\u00e3 nhanh ch\u00f3ng ph\u00e1t tri\u1ec3n. Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, \u0111\u1ec3 ki\u1ec3m so\u00e1t hi\u1ec7u qu\u1ea3 h\u00e0nh vi t\u0103ng tr\u01b0\u1edfng c\u1ee7a b\u1ed9t composite WC \/ Co si\u00eau m\u1ecbn trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft, m\u1ed9t s\u1ed1 quy tr\u00ecnh thi\u00eau k\u1ebft m\u1edbi \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n, nh\u01b0 thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed, thi\u00eau k\u1ebft b\u00e1o ch\u00ed n\u00f3ng, thi\u00eau k\u1ebft l\u00f2 vi s\u00f3ng v\u00e0 thi\u00eau k\u1ebft plasma plasma , v.v. 1 Qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed Khi k\u1ebft th\u00fac qu\u00e1 tr\u00ecnh kh\u1eed kh\u00ed, qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n l\u1ed7 ch\u00e2n l\u00f4ng tr\u00ean b\u1ec1 m\u1eb7t nh\u1ecf g\u1ecdn \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u00f3ng l\u1ea1i v\u00e0 pha coban t\u1ed3n t\u1ea1i trong pha l\u1ecfng. S\u1eed d\u1ee5ng kh\u00ed tr\u01a1 l\u00e0m m\u00f4i tr\u01b0\u1eddng \u00e1p su\u1ea5t, \u00e9p \u0111\u1eb3ng nhi\u1ec7t n\u00f3ng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho h\u1ee3p kim \u0111\u1ec3 th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh c\u00f4 \u0111\u1eb7c c\u1ee7a h\u1ee3p kim. Thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed k\u1ebft h\u1ee3p hi\u1ec7u qu\u1ea3 thi\u00eau k\u1ebft ch\u00e2n kh\u00f4ng v\u00e0 \u00e9p \u0111\u1eb3ng nhi\u1ec7t n\u00f3ng \u0111\u1ec3 th\u00fac \u0111\u1ea9y d\u00f2ng pha coban v\u00e0 tri\u1ec7t ti\u00eau s\u1ef1 bi\u1ebfn \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 cao c\u1ee7a Co, gi\u00fap lo\u1ea1i b\u1ecf l\u1ed7 ch\u00e2n l\u00f4ng v\u00e0 b\u1ec3 coban c\u1ee7a s\u1ea3n ph\u1ea9m, \u0111\u1ec3 h\u1ee3p kim c\u00f3 c\u1ea5u tr\u00fac m\u1ecbn v\u00e0 \u0111\u1ed3ng nh\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n r\u1ea5t nhi\u1ec1u. So v\u1edbi ph\u01b0\u01a1ng ph\u00e1p \u00e9p \u0111\u1eb3ng nhi\u1ec7t truy\u1ec1n th\u1ed1ng, \u00e1p su\u1ea5t thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed ch\u1ec9 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 1\/10 ho\u1eb7c \u00edt h\u01a1n \u00e1p su\u1ea5t \u0111\u1eb3ng nhi\u1ec7t n\u00f3ng, gi\u00fap gi\u1ea3m \u0111\u00e1ng k\u1ec3 chi ph\u00ed s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb v\u00e0 chi ph\u00ed b\u1ea3o tr\u00ec. Du Wei et al \u0111\u00e3 s\u1eed d\u1ee5ng b\u1ed9t WC nano \/ si\u00eau m\u1ecbn v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t 0,53 \u03bcm v\u00e0 b\u1ed9t Co h\u00ecnh c\u1ea7u l\u00e0m nguy\u00ean li\u1ec7u \u0111\u1ec3 so s\u00e1nh hi\u1ec7u qu\u1ea3 c\u1ee7a qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft ch\u00e2n kh\u00f4ng v\u00e0 thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t c\u1ee7a cacbua xi m\u0103ng WC-2.5%. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 x\u1ed1p c\u1ee7a h\u1ee3p kim v\u00e0 ng\u0103n ch\u1eb7n s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t b\u1ea5t th\u01b0\u1eddng. \u0110\u1ed9 b\u1ec1n u\u1ed1n c\u1ee7a h\u1ee3p kim t\u0103ng t\u1eeb 1800 MPa l\u00ean 2250 MPa. Wei Chongbin v\u00e0 c\u00e1c c\u00f4ng ty kh\u00e1c \u0111\u00e3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p kh\u1eed \/ cacbon h\u00f3a t\u1ea1i ch\u1ed7 c\u1ee7a b\u1ed9t composite nano \/ si\u00eau m\u1ecbn WC-10Co l\u00e0m nguy\u00ean li\u1ec7u \u0111\u1ec3 so s\u00e1nh hi\u1ec7u qu\u1ea3 c\u1ee7a qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft ch\u00e2n kh\u00f4ng v\u00e0 thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed \u0111\u1ed1i v\u1edbi c\u1ea5u tr\u00fac v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a h\u1ee3p kim \u1edf 1420 \u00b0 C trong 1 h. \u00c1p su\u1ea5t thi\u00eau k\u1ebft l\u00e0 2 MPa. K\u1ebft qu\u1ea3 cho th\u1ea5y thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 hi\u1ec7u su\u1ea5t c\u1ee7a h\u1ee3p kim v\u00e0 t\u0103ng \u0111\u1ed9 b\u1ec1n g\u00e3y t\u1eeb 10,2MPa \u2022 m1 \/ 2 l\u00ean 13. 6MPa \u2022 m1 \/ 2 Shi Xiaoliang et al \u0111\u00e3 s\u1eed d\u1ee5ng b\u1ed9t h\u1ed7n h\u1ee3p WC-10Co \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p chuy\u1ec3n \u0111\u1ed5i phun l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 v\u00e0 sau khi nghi\u1ec1n bi trong 48 gi\u1edd, \u0111\u00e3 s\u1ea3n xu\u1ea5t WC-10Co-0.4VC-0. B\u1ed9t h\u1ed7n h\u1ee3p 4Cr 3 C 2; ti\u1ebfp theo l\u00e0 qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed, qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft trong 1h \u1edf 320 \u00b0 C, \u00e1p su\u1ea5t l\u00e0 5. \u1ede 5 MPa, h\u1ee3p kim thu \u0111\u01b0\u1ee3c c\u00f3 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc cao, v\u00e0 \u0111\u1ed9 c\u1ee9ng HRA l\u00e0 92. 8, c\u01b0\u1eddng \u0111\u1ed9 l\u00e0 3 780 MPa. T\u1eeb c\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u tr\u01b0\u1edbc \u0111\u00e2y, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a h\u1ee3p kim c\u1ee9ng h\u1ea1t nano \/ si\u00eau m\u1ecbn thu \u0111\u01b0\u1ee3c khi thi\u00eau k\u1ebft \u00e1p su\u1ea5t kh\u00ed l\u00e0 nh\u1ecf, c\u1ea5u tr\u00fac \u0111\u1ed3ng \u0111\u1ec1u, v\u00e0 \u0111\u1ed9 b\u1ec1n c\u0169ng r\u1ea5t t\u1ed1t. Hi\u1ec7n nay, n\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t h\u1ee3p kim c\u1ee9ng k\u1ebft tinh nano \/ si\u00eau m\u1ecbn \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p. M\u1ed9t trong nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p thi\u00eau k\u1ebft ch\u00ednh.2. Qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft b\u00e1o ch\u00ed n\u00f3ng-thi\u00eau k\u1ebft b\u00e1o ch\u00ed l\u00e0 ph\u01b0\u01a1ng ph\u00e1p k\u1ebft h\u1ee3p hi\u1ec7u qu\u1ea3 gi\u1eefa qu\u00e1 tr\u00ecnh \u00e9p v\u00e0 thi\u00eau k\u1ebft v\u00e0 l\u00e0m \u0111\u1eadm \u0111\u1eb7c h\u1ee3p kim d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng k\u1ebft h\u1ee3p c\u1ee7a \u00e1p su\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9. So v\u1edbi c\u00e1c quy tr\u00ecnh \u00e9p v\u00e0 thi\u00eau k\u1ebft truy\u1ec1n th\u1ed1ng, thi\u00eau k\u1ebft \u00e9p n\u00f3ng c\u00f3 th\u1ec3 lo\u1ea1i b\u1ecf s\u1ef1 c\u1ea7n thi\u1ebft ph\u1ea3i th\u00eam c\u00e1c t\u00e1c nh\u00e2n t\u1ea1o h\u00ecnh v\u00e0 gi\u1ea3m s\u1ef1 gi\u1edbi thi\u1ec7u c\u1ee7a t\u1ea1p ch\u1ea5t; \u0111\u1ed9 d\u1ebbo v\u00e0 t\u00ednh l\u01b0u \u0111\u1ed9ng c\u1ee7a b\u1ed9t \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 trong \u0111i\u1ec1u ki\u1ec7n \u00e9p nhi\u1ec7t, v\u00e0 s\u1ef1 t\u0103ng c\u01b0\u1eddng c\u1ee7a h\u1ee3p kim \u0111\u01b0\u1ee3c th\u00fac \u0111\u1ea9y, v\u00e0 nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft c\u00f3 th\u1ec3 gi\u1ea3m \u1edf nhi\u1ec7t \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p. M\u1ed9t h\u1ee3p kim ho\u00e0n to\u00e0n \u0111\u1eadm \u0111\u1eb7c thu \u0111\u01b0\u1ee3c trong m\u1ed9t th\u1eddi gian thi\u00eau k\u1ebft ng\u1eafn.Li Zhixi et al. \u0111\u00e3 s\u1eed d\u1ee5ng b\u1ed9t WC \/ nano si\u00eau m\u1ecbn (0,81 m) v\u00e0 b\u1ed9t Co (1,35 \u03bcm) l\u00e0m nguy\u00ean li\u1ec7u, v\u00e0 Cr 3 C 2 v\u00e0 VC l\u00e0m ch\u1ea5t \u1ee9c ch\u1ebf t\u0103ng tr\u01b0\u1edfng h\u1ea1t th\u00f4ng qua nghi\u1ec1n b\u00f3ng n\u0103ng l\u01b0\u1ee3ng cao h\u00e0nh tinh. K\u00edch th\u01b0\u1edbc h\u1ea1t \u0111\u00e3 chu\u1ea9n b\u1ecb nh\u1ecf h\u01a1n 0. B\u1ed9t composite 3 mm WC-Co sau \u0111\u00f3 \u0111\u01b0\u1ee3c \u00e9p n\u00f3ng v\u00e0 thi\u00eau k\u1ebft \u0111\u1ec3 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft \u00e9p n\u00f3ng l\u00ean hi\u1ec7u su\u1ea5t m\u1eabu. K\u1ebft qu\u1ea3 cho th\u1ea5y cacbua xi m\u0103ng WC-10Co c\u00f3 c\u1ea5u tr\u00fac vi m\u00f4 \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t trung b\u00ecnh d\u01b0\u1edbi 0,8 \u03bcm thu \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch nung n\u00f3ng \u1edf nhi\u1ec7t \u0111\u1ed9 1 400 \u00b0 C, nhi\u1ec7t \u0111\u1ed9 2 gi\u1edd v\u00e0 \u00e1p su\u1ea5t 30 MPa. K\u00edch th\u01b0\u1edbc h\u1ea1t \u0111\u00e3 \u0111\u01b0\u1ee3c t\u0103ng l\u00ean. Ch\u1ea5t \u1ee9c ch\u1ebf Cr 3 C 2 +0. Gi\u00e1 tr\u1ecb si\u00eau nh\u1ecf 4VC 56GPa. Zhu Qikou et al. b\u1ed9t \u0111\u00e3 qua s\u1eed d\u1ee5ng WC - 6Co c\u00f3 \u0111\u01b0\u1eddng k\u00ednh 300nm \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng c\u00e1ch gi\u1ea3m t\u1ea1i ch\u1ed7 d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 cao l\u00e0m nguy\u00ean li\u1ec7u, v\u00e0 \u00e1p d\u1ee5ng ch\u00fang b\u1eb1ng c\u00e1ch nung n\u00f3ng \u1edf nhi\u1ec7t \u0111\u1ed9 1 200 \u00b0 C trong 20 MPa v\u00e0 gi\u1eef \u1ea5m. 5h Chu\u1ea9n b\u1ecb cacbua xi m\u0103ng Nano \/ Ultrafine WC-6Co. K\u1ebft qu\u1ea3 cho th\u1ea5y thi\u00eau k\u1ebft \u00e9p n\u00f3ng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u qu\u1ea3 l\u1ed7 ch\u00e2n l\u00f4ng h\u1ee3p kim v\u00e0 \u1ee9c ch\u1ebf s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t. K\u00edch th\u01b0\u1edbc h\u1ea1t trung b\u00ecnh c\u1ee7a WC trong h\u1ee3p kim l\u00e0 600nm v\u00e0 ph\u00e2n b\u1ed1 \u0111\u1ec1u. \u0110\u1ed9 c\u1ee9ng HRA l\u00e0 93 v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 g\u00e3y ngang l\u00e0 1530 MPa. Liu Xuemei v\u00e0 nh\u1eefng ng\u01b0\u1eddi kh\u00e1c \u0111\u00e3 s\u1eed d\u1ee5ng b\u1ed9t WO 3, b\u1ed9t Co 3 O 4 v\u00e0 b\u1ed9t \u0111en carbon l\u00e0m nguy\u00ean li\u1ec7u, tr\u01b0\u1edbc ti\u00ean \u0111\u01b0\u1ee3c x\u1eed l\u00fd trong l\u00f2 x\u1eed l\u00fd nhi\u1ec7t ch\u00e2n kh\u00f4ng, sau \u0111\u00f3 s\u1eed d\u1ee5ng nanocompozit \u1edf nhi\u1ec7t \u0111\u1ed9 1 370 \u00b0 C d\u01b0\u1edbi \u00e1p su\u1ea5t 20 MPa cho 1,5h. WC h\u1ea1t m\u1ecbn - Co lo\u1ea1i cacbua. K\u1ebft qu\u1ea3 cho th\u1ea5y cacbua xi m\u0103ng \u0111\u00e3 chu\u1ea9n b\u1ecb c\u00f3 m\u1eadt \u0111\u1ed9 cao v\u00e0 pha WC v\u00e0 Co tinh khi\u1ebft v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t trung b\u00ecnh l\u00e0 0,813 \u03bcm, \u0111\u1ed9 c\u1ee9ng HRA v\u00e0 \u0111\u1ed9 b\u1ec1n g\u00e3y l\u1ea7n l\u01b0\u1ee3t l\u00e0 92,5 v\u00e0 8,44 MPa \u2022 m1 \/ 2. T\u1eeb k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng \u0111\u1ed9 b\u1ec1n c\u1ee7a h\u1ee3p kim sau khi thi\u00eau k\u1ebft \u00e9p n\u00f3ng n\u00f3i chung l\u00e0 th\u1ea5p, ch\u1ee7 y\u1ebfu l\u00e0 do \u00e1p l\u1ef1c d\u1ecdc tr\u1ee5c ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft \u00e9p n\u00f3ng, do \u0111\u00f3 c\u1ea5u tr\u00fac c\u1ee7a c\u00e1c b\u1ed9 ph\u1eadn kh\u00e1c nhau c\u1ee7a h\u1ee3p kim trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft do l\u1ef1c t\u1ea1o ra kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u T\u00ednh d\u1ecb h\u01b0\u1edbng d\u1eabn \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n c\u1ee7a h\u1ee3p kim th\u1ea5p h\u01a1n v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tu\u1ed5i th\u1ecd c\u1ee7a h\u1ee3p kim.2. Thi\u00eau k\u1ebft vi s\u00f3ng 3 thi\u00eau k\u1ebft l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 thi\u00eau k\u1ebft nhanh m\u1edbi s\u1eed d\u1ee5ng s\u1ef1 m\u1ea5t \u0111i\u1ec7n m\u00f4i c\u1ee7a v\u1eadt li\u1ec7u trong tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb vi s\u00f3ng \u0111\u1ec3 l\u00e0m n\u00f3ng to\u00e0n b\u1ed9 c\u01a1 th\u1ec3 thi\u00eau k\u1ebft \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 thi\u00eau k\u1ebft v\u00e0 m\u1eadt \u0111\u1ed9. V\u00ec n\u0103ng l\u01b0\u1ee3ng vi s\u00f3ng l\u00e0m t\u0103ng \u0111\u1ed9ng n\u0103ng c\u1ee7a c\u00e1c nguy\u00ean t\u1eed, ph\u00e2n t\u1eed ho\u1eb7c ion b\u00ean trong v\u1eadt li\u1ec7u thi\u00eau k\u1ebft, n\u00ean n\u0103ng l\u01b0\u1ee3ng k\u00edch ho\u1ea1t thi\u00eau k\u1ebft c\u1ee7a v\u1eadt li\u1ec7u b\u1ecb gi\u1ea3m, thu\u1eadn l\u1ee3i trong vi\u1ec7c gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft v\u00e0 r\u00fat ng\u1eafn th\u1eddi gian thi\u00eau k\u1ebft. \u0110\u1ed3ng th\u1eddi, l\u00f2 vi s\u00f3ng c\u00f3 \u0111\u1eb7c t\u00ednh l\u00e0m n\u00f3ng nhanh v\u00e0 gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 nhanh, do \u0111\u00f3 c\u00e1c v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p thi\u00eau k\u1ebft vi s\u00f3ng c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a c\u1ea5u tr\u00fac vi m\u00f4 \u0111\u1ed3ng nh\u1ea5t v\u00e0 \u0111\u1ed9 m\u1ecbn, \u0111\u1ed9 b\u1ec1n t\u1ed1t, v.v. B\u1ed9t composite WC- 10Co \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng cao - nghi\u1ec1n b\u00f3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 cho to\u00e0n b\u1ed9 \u0111\u1ec9nh v\u00e0 qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft vi s\u00f3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf h\u1ee3p kim c\u1ee9ng. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y th\u1eddi gian t\u1ea9y v\u00e0 nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a h\u1ee3p kim, trong khi th\u1eddi gian gi\u1eef v\u00e0 t\u1ed1c \u0111\u1ed9 nung \u00edt \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a h\u1ee3p kim. K\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c \u1edf th\u1eddi gian t\u1ea9y l\u00e0 20 ph\u00fat v\u00e0 nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft l\u00e0 1 320 \u00b0 C. C\u00e1c h\u1ea1t h\u1ee3p kim r\u1ea5t m\u1ecbn v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u, m\u1eadt \u0111\u1ed9 14. 32g \/ cm3, \u0111\u1ed9 c\u1ee9ng HV30 16. 11GPa, \u0111\u1ed9 b\u1ec1n g\u00e3y \u0111\u1ebfn 9. 78MPa \u2022 m1 \/ 2 Lu et al. nh\u1eadn th\u1ea5y r\u1eb1ng th\u1eddi gian gi\u1eef c\u00f3 \u00edt \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 t\u0103ng tr\u01b0\u1edfng h\u1ea1t c\u1ee7a cacbua xi m\u0103ng WC-8Co thi\u00eau k\u1ebft. B\u1ea2O R et al. \u0111\u00e3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n bi h\u00e0nh tinh \u0111\u1ec3 tr\u1ed9n v\u00e0 n\u00e9n b\u1ed9t WC v\u00e0 Co v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t 0,15 \u03bcm, sau \u0111\u00f3 l\u00e0 thi\u00eau k\u1ebft vi s\u00f3ng. K\u1ebft qu\u1ea3 cho th\u1ea5y thi\u00eau k\u1ebft vi s\u00f3ng c\u00f3 \u0111\u1eb7c t\u00ednh c\u1ee7a m\u1eadt \u0111\u1ed9 nhanh. Sau khi thi\u00eau k\u1ebft, pha kh\u1eed m\u00e0u h\u00ecnh th\u00e0nh tr\u00ean b\u1ec1 m\u1eb7t h\u1ee3p kim. Th\u00eam m\u1ed9t l\u01b0\u1ee3ng carbon \u0111en nh\u1ea5t \u0111\u1ecbnh trong qu\u00e1 tr\u00ecnh tr\u1ed9n c\u00f3 th\u1ec3 \u1ee9c ch\u1ebf qu\u00e1 tr\u00ecnh kh\u1eed cacbon c\u1ee7a b\u1ec1 m\u1eb7t h\u1ee3p kim v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 hi\u1ec7u su\u1ea5t c\u1ee7a h\u1ee3p kim. \u0110\u1ed9 c\u1ee9ng HRA c\u1ee7a h\u1ee3p kim \u0111\u1ea1t 93,2 sau khi thi\u00eau k\u1ebft vi s\u00f3ng b\u1eb1ng b\u1ed9t h\u1ed7n h\u1ee3p c\u00f3 t\u1ed5ng h\u00e0m l\u01b0\u1ee3ng carbon l\u00e0 6.08%. M\u1eb7c d\u00f9 thi\u00eau k\u1ebft vi s\u00f3ng c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 th\u1eddi gian thi\u00eau k\u1ebft ng\u1eafn, t\u1ed1c \u0111\u1ed9 gia nhi\u1ec7t nhanh, k\u00edch th\u01b0\u1edbc h\u1ea1t m\u1ecbn v\u00e0 \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc tuy\u1ec7t v\u1eddi, thi\u00eau k\u1ebft vi s\u00f3ng c\u00f3 t\u00ednh ch\u1ecdn l\u1ecdc m\u1ea1nh \u0111\u1ed1i v\u1edbi v\u1eadt li\u1ec7u, v\u00e0 d\u1ec5 b\u1ecb ch\u1ea3y nhi\u1ec7t v\u00e0 gia nhi\u1ec7t kh\u00f4ng \u0111\u1ec1u. T\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u. \u0110\u1ed3ng th\u1eddi, vi\u1ec7c chu\u1ea9n b\u1ecb l\u00f2 vi s\u00f3ng c\u00f4ng su\u1ea5t cao v\u1eabn l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 c\u00f4ng nghi\u1ec7p. Hi\u1ec7n t\u1ea1i, nghi\u00ean c\u1ee9u ch\u00ednh v\u1eabn t\u1eadp trung \u1edf c\u00e1c tr\u01b0\u1eddng h\u1ecdc v\u00e0 vi\u1ec7n nghi\u00ean c\u1ee9u, v\u00e0 ch\u01b0a c\u00f3 s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p quy m\u00f4 l\u1edbn n\u00e0o \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh.2. 4 Thi\u00eau k\u1ebft plasma ph\u00f3ng \u0111i\u1ec7n Thi\u00eau k\u1ebft plasma ph\u00f3ng \u0111i\u1ec7n l\u00e0 \u1ee9ng d\u1ee5ng tr\u1ef1c ti\u1ebfp c\u1ee7a \u00e1p su\u1ea5t v\u00e0 d\u00f2ng xung DC gi\u1eefa c\u00e1c h\u1ea1t b\u1ed9t. D\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng k\u1ebft h\u1ee3p c\u1ee7a \u00e1p su\u1ea5t c\u01a1 h\u1ecdc, \u00e1p su\u1ea5t xung x\u1ea3 v\u00e0 tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao t\u1ee9c th\u1eddi, c\u00e1c h\u1ea1t c\u01a1 th\u1ec3 thi\u00eau k\u1ebft t\u1ef1 ph\u00e1t nhi\u1ec7t v\u00e0 k\u00edch ho\u1ea1t b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c h\u1ea1t \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1eadt \u0111\u1ed9 nhanh. M\u1ed9t lo\u1ea1i qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft m\u1edbi. Qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft plasma c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 t\u1ed1c \u0111\u1ed9 gia nhi\u1ec7t nhanh, th\u1eddi gian thi\u00eau k\u1ebft ng\u1eafn v\u00e0 nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft th\u1ea5p, gi\u00fap r\u00fat ng\u1eafn chu tr\u00ecnh chu\u1ea9n b\u1ecb v\u00e0 ng\u0103n ch\u1eb7n s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a h\u1ea1t tinh th\u1ec3. C\u01a1 th\u1ec3 thi\u00eau k\u1ebft thu \u0111\u01b0\u1ee3c c\u00f3 c\u1ea5u tr\u00fac vi \u0111i\u1ec1u khi\u1ec3n t\u1ed1t, k\u00edch th\u01b0\u1edbc h\u1ea1t m\u1ecbn v\u00e0 ph\u00e2n b\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u, v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 tuy\u1ec7t v\u1eddi. . GAO Y v\u00e0 c\u00e1c lo\u1ea1i b\u1ed9t composite nano-WC-10Co kh\u00e1c \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng qu\u00e1 tr\u00ecnh cacbon h\u00f3a kh\u1eed t\u1ea1i ch\u1ed7 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m nguy\u00ean li\u1ec7u, VC \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t \u1ee9c ch\u1ebf t\u0103ng tr\u01b0\u1edfng h\u1ea1t v\u00e0 thi\u00eau k\u1ebft plasma plasma \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 nghi\u00ean c\u1ee9u ph\u00e2n ph\u1ed1i carbon khi thi\u00eau k\u1ebft nhi\u1ec7t \u0111\u1ed9 1 130 \u00b0 C v\u00e0 \u00e1p su\u1ea5t 60 MPa. \u1ea2nh h\u01b0\u1edfng c\u1ee7a kh\u1ed1i l\u01b0\u1ee3ng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a cacbua xi m\u0103ng plasma thi\u00eau k\u1ebft. K\u1ebft qu\u1ea3 cho th\u1ea5y l\u01b0\u1ee3ng carbon c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn pha, c\u1ea5u tr\u00fac v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a h\u1ee3p kim. Theo ph\u00e2n b\u1ed5 carbon t\u1ed1i \u01b0u, h\u1ee3p kim c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac \u0111\u1ed3ng nh\u1ea5t v\u00e0 pha tinh khi\u1ebft, v\u1edbi \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n g\u00e3y \u0111\u1ea1t 20,50GPa v\u00e0 14. 5MPa \u2022 m1 \/ 2 Hao Quan et al. \u0111\u00e3 s\u1eed d\u1ee5ng b\u1ed9t h\u1ed7n h\u1ee3p WC-10Co v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t 250nm \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb b\u1edfi qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i phun l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 \u0111\u1ec3 thi\u00eau k\u1ebft plasma, v\u00e0 nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 kh\u00f4ng kh\u00ed thi\u00eau k\u1ebft. K\u1ebft qu\u1ea3 cho th\u1ea5y nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft t\u0103ng, \u00e1p su\u1ea5t trong l\u00f2 gi\u1ea3m, pha coban bay h\u01a1i v\u00e0 h\u1ee3p kim l\u1ec7ch kh\u1ecfi pha c\u00e2n b\u1eb1ng. H\u00e0m l\u01b0\u1ee3ng Co c\u1ee7a b\u1ed9t composite WC-10.10Co thi\u00eau k\u1ebft \u1edf 1 250 \u00b0 C trong 5 ph\u00fat tr\u1edf th\u00e0nh 10.02%. LIU WB v\u00e0 c\u1ed9ng s\u1ef1. nghi\u00ean c\u1ee9u \u0111\u1ea7y \u0111\u1ee7 \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c th\u00f4ng s\u1ed1 qu\u00e1 tr\u00ecnh ph\u00f3ng \u0111i\u1ec7n plasma \u0111\u1ebfn c\u1ea5u tr\u00fac v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a h\u1ee3p kim. K\u1ebft qu\u1ea3 cho th\u1ea5y trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft plasma plasma, nhi\u1ec7t \u0111\u1ed9 b\u1eaft \u0111\u1ea7u t\u0103ng m\u1eadt \u0111\u1ed9 c\u1ee7a b\u1ed9t composite WC \/ Co si\u00eau m\u1ecbn l\u00e0 kho\u1ea3ng 804 \u00b0 C. \u0110\u1ed9 c\u1ee9ng HRA, \u0111\u1ed9 b\u1ec1n g\u00e3y v\u00e0 \u0111\u1ed9 b\u1ec1n \u0111\u1ee9t ngang 92,6, 12 MPa \u2022 m1 \/ 2 v\u00e0 2 180 MPa c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c v\u1eadt li\u1ec7u c\u1ee9ng hi\u1ec7u su\u1ea5t cao trong \u0111i\u1ec1u ki\u1ec7n t\u1ed1i \u01b0u h\u00f3a nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft l\u00e0 1 325 \u00b0 C, \u00e1p su\u1ea5t 50 MPa, v\u00e0 th\u1eddi gian gi\u1eef t\u1eeb 6 \u0111\u1ebfn 8 ph\u00fat. h\u1ee3p kim. B\u1edfi v\u00ec thi\u00eau k\u1ebft plasma plasma c\u00f3 \u0111i\u1ec7n \u00e1p xung DC \u0111\u1eb7c bi\u1ec7t, c\u00f3 l\u1ee3i cho d\u00f2ng ch\u1ea3y d\u1ebbo v\u00e0 khu\u1ebfch t\u00e1n b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c h\u1ea1t trong qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft, v\u00e0 v\u1eadt li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c l\u00e0m \u0111\u1eadm \u0111\u1eb7c nhanh ch\u00f3ng \u1edf nhi\u1ec7t \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p v\u00e0 trong th\u1eddi gian ng\u1eafn. \u0110\u00f3 l\u00e0 m\u1ed9t c\u00f4ng ngh\u1ec7 m\u1edbi \u0111\u1ea7y h\u1ee9a h\u1eb9n. , \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u r\u1ed9ng r\u00e3i tr\u00ean to\u00e0n th\u1ebf gi\u1edbi. Tuy nhi\u00ean, thi\u00eau k\u1ebft plasma plasma l\u00e0 kh\u00f3 kh\u0103n cho vi\u1ec7c thi\u00eau k\u1ebft c\u00e1c c\u1ea5u tr\u00fac ph\u1ee9c t\u1ea1p, v\u00e0 \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p quy m\u00f4 l\u1edbn v\u1eabn \u0111ang trong giai \u0111o\u1ea1n th\u0103m d\u00f2.Fig. 3 d\u1ea5u v\u1ebft m\u00e0i m\u00f2n c\u1ee7a nano WC-7Co c\u00e0o m\u1eb7tFig. 4 H\u1ec7 s\u1ed1 ma s\u00e1t c\u1ee7a cacbua nano v\u00e0 cacbua xi m\u0103ng th\u00f4ng th\u01b0\u1eddng d\u01b0\u1edbi c\u00e1c t\u1ea3i tr\u1ecdng kh\u00e1c nhau3 K\u1ebft lu\u1eadn cacbua xi m\u0103ng tinh th\u1ec3 \/ si\u00eau m\u1ecbn l\u00e0 m\u1ed9t s\u1ea3n ph\u1ea9m cacbua xi m\u0103ng c\u00f3 hi\u1ec7u su\u1ea5t cao, c\u00f3 gi\u00e1 tr\u1ecb gia t\u0103ng cao. S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m cacbua h\u1ea1t nano \/ si\u00eau m\u1ecbn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u00f4ng nghi\u1ec7p h\u00f3a \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 c\u1ea7n gi\u1ea3i quy\u1ebft trong ng\u00e0nh c\u00f4ng nghi\u1ec7p cacbua xi m\u0103ng \u1edf Trung Qu\u1ed1c. N\u00f3 c\u00f3 \u00fd ngh\u0129a l\u1edbn \u0111\u1ec3 th\u00fac \u0111\u1ea9y s\u1ef1 ph\u00e1t tri\u1ec3n l\u00e0nh m\u1ea1nh c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p h\u1ee3p kim c\u1ee9ng c\u1ee7a Trung Qu\u1ed1c. Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, d\u01b0\u1edbi s\u1ef1 h\u1ed7 tr\u1ee3 m\u1ea1nh m\u1ebd c\u1ee7a ch\u00ednh s\u00e1ch qu\u1ed1c gia, vi\u1ec7c chu\u1ea9n b\u1ecb b\u1ed9t h\u1ed7n h\u1ee3p nano \/ si\u00eau m\u1ecbn WC-Co \u1edf Trung Qu\u1ed1c \u0111\u00e3 t\u1ea1o ra m\u1ed9t b\u01b0\u1edbc \u0111\u1ed9t ph\u00e1, v\u00e0 b\u1ed9t composite WC-Co nano \/ si\u00eau m\u1ecbn hi\u1ec7u su\u1ea5t cao \u0111\u00e3 d\u1ea7n \u0111\u01b0\u1ee3c c\u00f4ng nghi\u1ec7p h\u00f3a. Tuy nhi\u00ean, \u0111\u1ec3 s\u1ea3n xu\u1ea5t cacbua xi m\u0103ng tinh th\u1ec3 nano \/ si\u00eau m\u1ecbn hi\u1ec7u su\u1ea5t cao v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh v\u00e0 s\u1ea3n ph\u1ea9m \u0111\u00e1ng tin c\u1eady, \u0111\u1eb7c bi\u1ec7t l\u00e0 s\u1ea3n xu\u1ea5t quy m\u00f4 l\u1edbn c\u00e1c cacbua xi m\u0103ng tinh th\u1ec3 nano \/ si\u00eau m\u1ecbn v\u1edbi k\u00edch th\u01b0\u1edbc h\u1ea1t nh\u1ecf h\u01a1n 0,2 \u03bcm, n\u00f3 v\u1eabn c\u00f2n c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u0103ng nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c qu\u00e1 tr\u00ecnh chu\u1ea9n b\u1ecb li\u00ean quan \u0111\u1ebfn h\u1ee3p kim.<br \/>\nNgu\u1ed3n: Meeyou cacbua<\/div>\n<p><!-- .vgblk-rw-wrapper --><\/p>","protected":false},"excerpt":{"rendered":"<p>Abstract : The two key factors for the preparation of nano \/ ultrafine WC &#8211; Co cemented carbides are the prep -Aration of high &#8211; quality nano\/ ultrafine WC &#8211; Co composite powders and the control of grain growth during sintering. The research progress at home and abroad in recent years is comprehensively reviewed on&#8230;<\/p>","protected":false},"author":1,"featured_media":1183,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[92],"tags":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/1182"}],"collection":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=1182"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/1182\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=1182"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=1182"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=1182"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}