{"id":13906,"date":"2020-03-06T06:44:00","date_gmt":"2020-03-06T06:44:00","guid":{"rendered":"https:\/\/www.meetyoucarbide.com\/?p=13906"},"modified":"2020-05-07T00:41:18","modified_gmt":"2020-05-07T00:41:18","slug":"new-breakthrough-of-tungsten-carbide-with-superior-properties-of-the-beijing-university","status":"publish","type":"post","link":"https:\/\/www.meetyoucarbide.com\/vi\/new-breakthrough-of-tungsten-carbide-with-superior-properties-of-the-beijing-university\/","title":{"rendered":"B\u01b0\u1edbc \u0111\u1ed9t ph\u00e1 m\u1edbi c\u1ee7a cacbua vonfram v\u1edbi t\u00ednh ch\u1ea5t v\u01b0\u1ee3t tr\u1ed9i c\u1ee7a \u0110\u1ea1i h\u1ecdc B\u1eafc Kinh"},"content":{"rendered":"
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Do \u0111\u1ed9 c\u1ee9ng cao v\u00e0 ch\u1ed1ng m\u00e0i m\u00f2n, <\/strong>cacbua vonfram <\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u01b0 m\u1ed9t lo\u1ea1t c\u00e1c v\u1eadt li\u1ec7u c\u00f4ng c\u1ee5 ch\u1ebf bi\u1ebfn, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 r\u0103ng c\u00f4ng nghi\u1ec7p. Trong s\u1ed1 \u0111\u00f3, WC Co <\/strong>cacbua vonfram <\/strong> l\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 ti\u00eau th\u1ee5 l\u1edbn nh\u1ea5t c\u1ee7a <\/strong>cacbua vonfram <\/strong> nguy\u00ean v\u1eadt li\u1ec7u. Sau nhi\u1ec1u th\u1eadp k\u1ef7 ph\u00e1t tri\u1ec3n, trong \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt c\u1ee7a <\/strong>cacbua vonfram <\/strong>, \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n v\u1ec1 c\u01a1 b\u1ea3n c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 hi\u1ec7u su\u1ea5t d\u1ecbch v\u1ee5, trong khi \u0111\u1ed9 b\u1ec1n g\u00e3y v\u00e0 \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp l\u00e0 n\u00fat th\u1eaft c\u1ee7a vi\u1ec7c m\u1edf r\u1ed9ng \u1ee9ng d\u1ee5ng <\/strong>cacbua vonfram <\/strong>, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1ee9ng d\u1ee5ng cao c\u1ea5p. Trong m\u1ed9t th\u1eddi gian d\u00e0i, thi\u1ebfu hi\u1ec3u bi\u1ebft c\u00f3 h\u1ec7 th\u1ed1ng v\u1ec1 c\u01a1 ch\u1ebf t\u0103ng c\u01b0\u1eddng v\u00e0 t\u0103ng c\u01b0\u1eddng <\/strong>cacbua vonfram <\/strong>, \u0111\u00f3 l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u composite hai pha g\u1ed1m v\u00e0 composite nhi\u1ec1u pha v\u1edbi ph\u1ee5 gia. M\u1ed1i quan h\u1ec7 gi\u1eefa \u0111a th\u00e0nh ph\u1ea7n, c\u1ea5u tr\u00fac, h\u00e0nh vi c\u01a1 h\u1ecdc v\u00e0 hi\u1ec7u su\u1ea5t to\u00e0n di\u1ec7n c\u1ee7a lo\u1ea1i h\u1ec7 th\u1ed1ng v\u1eadt li\u1ec7u n\u00e0y c\u1ea7n nghi\u00ean c\u1ee9u th\u00eam.<\/strong><\/strong><\/p>\n\n\n\n

1.khoa h\u1ecdc<\/strong>tr\u1ebb em<\/h2>\n\n\n\n

Hi\u1ec7n nay, c\u00e1c v\u1ea5n \u0111\u1ec1 khoa h\u1ecdc nghi\u00ean c\u1ee9u c\u01a1 b\u1ea3n ph\u1ed5 bi\u1ebfn trong l\u0129nh v\u1ef1c <\/strong>cacbua vonfram <\/strong> t\u1eeb \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft nh\u01b0 sau:<\/strong><\/strong><\/p>\n\n\n\n

trong ch\u1ebf ph\u1ea9m c\u00f4ng nghi\u1ec7p c\u1ee7a si\u00eau m\u1ecbn v\u00e0 tinh th\u1ec3 nano <\/strong>cacbua vonfram <\/strong>, s\u1ef1 t\u0103ng tr\u01b0\u1edfng c\u1ee7a h\u1ea1t ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1eb1ng c\u00e1ch th\u00eam c\u00e1c ch\u1ea5t \u1ee9c ch\u1ebf t\u0103ng tr\u01b0\u1edfng h\u1ea1t. Tuy nhi\u00ean, c\u00e1c ch\u1ea5t \u1ee9c ch\u1ebf th\u01b0\u1eddng c\u00f3 t\u00e1c d\u1ee5ng ph\u1ee5 \u0111\u1ed1i v\u1edbi \u0111\u1ed9 d\u1ebbo dai v\u00e0 s\u1ee9c m\u1ea1nh c\u1ee7a <\/strong>cacbua vonfram <\/strong>. C\u1ea7n hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7 c\u00e1c y\u1ebfu t\u1ed1 ki\u1ec3m so\u00e1t \u1ed5n \u0111\u1ecbnh c\u1ee7a c\u1ea5u tr\u00fac vi m\u00f4 c\u00f3 ngu\u1ed3n g\u1ed1c \u1ee9c ch\u1ebf v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u1ea5u tr\u00fac v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a <\/strong>cacbua vonfram <\/strong>.<\/strong><\/strong><\/p>\n\n\n\n

V\u1edbi vi\u1ec7c gi\u1ea3m k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a pha c\u1ee9ng d\u01b0\u1edbi thang Subicron, giao di\u1ec7n b\u00ean trong d\u1ea7n tr\u1edf th\u00e0nh y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a <\/strong>cacbua vonfram <\/strong>. Tuy nhi\u00ean, c\u00e1c y\u1ebfu t\u1ed1 c\u00f3 th\u1ec3 \u1ed5n \u0111\u1ecbnh ranh gi\u1edbi WC \/ CO v\u00e0 WC \/ WC v\u00e0 c\u01a1 ch\u1ebf \u1ed5n \u0111\u1ecbnh kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec3u r\u00f5, v\u00e0 c\u01a1 ch\u1ebf h\u00ecnh th\u00e0nh v\u00e0 ti\u1ebfn h\u00f3a c\u1ee7a giao di\u1ec7n n\u0103ng l\u01b0\u1ee3ng th\u1ea5p kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec3u r\u00f5.<\/strong><\/strong><\/p>\n\n\n\n

Th\u00f4ng qua nghi\u00ean c\u1ee9u c\u00e1c h\u00e0nh vi c\u01a1 h\u1ecdc v\u00e0 c\u01a1 ch\u1ebf vi m\u00f4 c\u1ee7a <\/strong>cacbua vonfram <\/strong> \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao, s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 c\u01a1 ch\u1ebf t\u0103ng c\u01b0\u1eddng v\u00e0 t\u0103ng c\u01b0\u1eddng trong quy tr\u00ecnh d\u1ecbch v\u1ee5 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u00e0o s\u00e2u, \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn thi\u1ebft k\u1ebf v\u00e0 chu\u1ea9n b\u1ecb hi\u1ec7u su\u1ea5t cao <\/strong>cacbua vonfram <\/strong>. Hi\u1ec7n t\u1ea1i, kh\u00f4ng c\u00f3 s\u1ef1 hi\u1ec3u bi\u1ebft c\u00f3 h\u1ec7 th\u1ed1ng v\u1ec1 c\u01a1 ch\u1ebf bi\u1ebfn d\u1ea1ng vi m\u00f4, ngu\u1ed3n g\u1ed1c c\u1ee7a ch\u1ea5t d\u1ebbo v\u00e0 h\u00e0nh vi c\u01a1 h\u1ecdc \u1edf nhi\u1ec7t \u0111\u1ed9 cao c\u1ee7a <\/strong>cacbua vonfram <\/strong>.<\/strong><\/strong><\/p>\n\n\n\n

2.Ti\u1ebfn \u0111\u1ed9 nghi\u00ean c\u1ee9u<\/strong><\/h2>\n\n\n\n

Nh\u00f3m c\u1ee7a gi\u00e1o s\u01b0 Song Xiaoyan thu\u1ed9c \u0110\u1ea1i h\u1ecdc C\u00f4ng ngh\u1ec7 B\u1eafc Kinh \u0111\u00e3 th\u1ef1c hi\u1ec7n m\u1ed9t lo\u1ea1t c\u00e1c nghi\u00ean c\u1ee9u c\u01a1 b\u1ea3n v\u1ec1 c\u00e1c v\u1ea5n \u0111\u1ec1 th\u1ef1c t\u1ebf trong \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt c\u1ee7a <\/strong>cacbua vonfram <\/strong>. N\u0103m 2013, nh\u00f3m nghi\u00ean c\u1ee9u l\u1ea7n \u0111\u1ea7u ti\u00ean chu\u1ea9n b\u1ecb tinh th\u1ec3 nano <\/strong>cacbua vonfram <\/strong> v\u1eadt li\u1ec7u kh\u1ed1i v\u1edbi m\u1eadt \u0111\u1ed9 cao v\u00e0 c\u1ea5u tr\u00fac \u0111\u1ed3ng nh\u1ea5t, c\u00f3 \u0111\u1ed9 c\u1ee9ng cao v\u00e0 \u0111\u1ed9 b\u1ec1n cao, v\u00e0 \u0111\u01b0a ra l\u00fd thuy\u1ebft c\u01b0\u1eddng \u0111\u1ed9 k\u1ebft h\u1ee3p m\u1ea1ch l\u1ea1c c\u1ee7a pha hai pha <\/strong>cacbua vonfram <\/strong> (ACTA mater. 2013, 61, 2154-2162), \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh \u0111\u1ea7y \u0111\u1ee7 trong c\u00e1c th\u00ed nghi\u1ec7m c\u01a1 h\u1ecdc t\u1ea1i ch\u1ed7 (mater. Res. Lett. 2017, 5, 55-60). G\u1ea7n \u0111\u00e2y, k\u1ebft h\u1ee3p m\u00f4 h\u00ecnh l\u00fd thuy\u1ebft v\u00e0 thi\u1ebft k\u1ebf th\u1eed nghi\u1ec7m, nh\u00f3m nghi\u00ean c\u1ee9u \u0111\u00e3 nghi\u00ean c\u1ee9u s\u00e2u v\u1ec1 c\u00e1c c\u1ea5u tr\u00fac giao di\u1ec7n kh\u00e1c nhau m\u00e0 c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n trong <\/strong>cacbua vonfram <\/strong> v\u1eadt li\u1ec7u, v\u00e0 t\u00ecm th\u1ea5y m\u1ed9t s\u1ed1 lo\u1ea1i c\u1ea5u tr\u00fac giao di\u1ec7n v\u1edbi \u0111\u1ed9 d\u00e0y 2-6 l\u1edbp nguy\u00ean t\u1eed, c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng, ph\u01b0\u01a1ng ph\u00e1p \u1ed5n \u0111\u1ecbnh v\u00e0 c\u01a1 ch\u1ebf vi m\u00f4. D\u1ef1a tr\u00ean vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a c\u00e1c ch\u1ea5t ph\u1ee5 gia v\u00e0 tinh ch\u1ec9nh th\u00e0nh ph\u1ea7n, vi\u1ec7c ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c t\u00ednh \u1ed5n \u0111\u1ecbnh c\u1ee7a c\u1ea5u tr\u00fac giao di\u1ec7n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. C\u01a1 ch\u1ebf ch\u1ed1ng g\u00e3y gi\u1eefa c\u00e1c v\u1eadt li\u1ec7u kh\u1edbp giao di\u1ec7n pha v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c nhau nh\u01b0 V, Cr, Ti, Ta v\u00e0 Nb \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t. H\u01a1n n\u1eefa, \u1ea3nh h\u01b0\u1edfng c\u1ee7a s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u1ea5u tr\u00fac giao di\u1ec7n v\u00e0 b\u1ea5t \u0111\u1eb3ng h\u01b0\u1edbng n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t \u0111\u1ed1i v\u1edbi s\u1ef1 h\u00ecnh th\u00e0nh v\u00e0 ti\u1ebfn h\u00f3a c\u1ee7a \u2211 2 v\u00e0 \u2211 13A \u1edf ranh gi\u1edbi n\u0103ng l\u01b0\u1ee3ng th\u1ea5p c\u00f3 \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch t\u1ed1i \u01b0u h\u00f3a c\u00e1c ch\u1ea5t \u1ee9c ch\u1ebf s\u1ef1 t\u0103ng tr\u01b0\u1edfng c\u1ee7a h\u1ea1t v\u00e0 ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 m\u1eadt \u0111\u1ed9 thi\u00eau k\u1ebft. Do \u0111\u00f3, v\u1ea5n \u0111\u1ec1 chu\u1ea9n b\u1ecb c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c l\u00e0 t\u0103ng t\u1ef7 l\u1ec7 ranh gi\u1edbi pha k\u1ebft h\u1ee3p WC \/ CO v\u1edbi ph\u00e2n b\u1ed1 ranh gi\u1edbi h\u1ea1t n\u0103ng l\u01b0\u1ee3ng th\u1ea5p WC \/ WC trong <\/strong>cacbua vonfram <\/strong> \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft. Th\u00e0nh t\u1ef1u li\u00ean quan \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 li\u00ean ti\u1ebfp trong t\u00e0i li\u1ec7u Acta. 2018, 149, 164-178 v\u00e0 ph\u01b0\u01a1ng ti\u1ec7n Acta. 2019, 175, 171-181 d\u01b0\u1edbi ti\u00eau \u0111\u1ec1 n\u01b0\u1edbc da ph\u1ee9c t\u1ea1p trong WC Co <\/strong>cacbua vonfram <\/strong>ranh gi\u1edbi h\u1ea1t n\u0103ng l\u01b0\u1ee3ng th\u1ea5p v\u00e0 th\u1ea5p \u1edf WC Co <\/strong>cacbua vonfram <\/strong>S". \u0110\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn b\u1edfi nghi\u00ean c\u1ee9u c\u01a1 b\u1ea3n, nh\u00f3m nghi\u00ean c\u1ee9u v\u00e0 doanh nghi\u1ec7p \u0111\u00e3 h\u1ee3p t\u00e1c \u0111\u1ec3 chu\u1ea9n b\u1ecb \u0111\u1ed9 b\u1ec1n c\u1ef1c cao v\u00e0 \u0111\u1ed9 d\u1ebbo dai cao <\/strong>cacbua vonfram <\/strong> c\u00e1c thanh c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 g\u00e3y ngang trung b\u00ecnh h\u01a1n 5200mpa v\u00e0 \u0111\u1ed9 b\u1ec1n g\u00e3y h\u01a1n 13.0mpa \u00b7 M1 \/ 2. Gi\u00e1 tr\u1ecb c\u01b0\u1eddng \u0111\u1ed9 g\u00e3y l\u00e0 ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t cao nh\u1ea5t c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 g\u00e3y trong s\u1ed1 t\u01b0\u01a1ng t\u1ef1 <\/strong>cacbua vonfram <\/strong> b\u00e1o c\u00e1o tr\u00ean th\u1ebf gi\u1edbi.<\/strong><\/strong><\/p>\n\n\n\n

Ngo\u00e0i ra, nh\u00f3m nghi\u00ean c\u1ee9u \u0111\u00e3 th\u1ef1c hi\u1ec7n r\u1ea5t nhi\u1ec1u nghi\u00ean c\u1ee9u v\u1ec1 m\u1ed1i quan h\u1ec7 gi\u1eefa c\u1ea5u tr\u00fac vi m\u00f4, h\u00e0nh vi c\u01a1 h\u1ecdc v\u00e0 t\u00ednh ch\u1ea5t to\u00e0n di\u1ec7n c\u1ee7a cacbua vonfram. Trong kh\u00eda c\u1ea1nh th\u00ed nghi\u1ec7m, s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a cacbua vonfram d\u01b0\u1edbi t\u1ea3i tr\u1ecdng b\u00ean ngo\u00e0i, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ecbnh lu\u1eadt chuy\u1ec3n \u0111\u1ed9ng sai l\u1ec7ch v\u00e0 x\u1ebfp ch\u1ed3ng, \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n th\u00f4ng qua th\u00ed nghi\u1ec7m c\u01a1 h\u1ecdc t\u1ea1i ch\u1ed7. <\/strong><\/p>\n\n\n\n

V\u1edbi s\u1ef1 tr\u1ee3 gi\u00fap c\u1ee7a \u0111\u1eb7c t\u00ednh c\u1ea5u tr\u00fac tinh t\u1ebf v\u00e0 ph\u00e2n t\u00edch tinh th\u1ec3 h\u1ecdc, c\u01a1 ch\u1ebf t\u01b0\u01a1ng t\u00e1c c\u1ee7a c\u00e1c khuy\u1ebft t\u1eadt tinh th\u1ec3 c\u1ee7a pha c\u1ee9ng v\u00e0 pha d\u1ebbo trong cacbua vonfram c\u01b0\u1eddng \u0111\u1ed9 cao v\u00e0 \u0111\u1ed9 b\u1ec1n \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t, v\u00e0 c\u01a1 ch\u1ebf t\u00e1c d\u1ee5ng c\u1ee7a n\u00f3 trong vi\u1ec7c tr\u00ec ho\u00e3n qu\u00e1 tr\u00ecnh t\u1ea1o m\u1ea7m n\u1ee9t v\u00e0 ch\u1ed1ng l\u1ea1i s\u1ef1 ph\u00e1t tri\u1ec3n v\u1ebft n\u1ee9t. \u0110\u1eb7c bi\u1ec7t, theo quan \u0111i\u1ec3m v\u1ec1 h\u00e0nh vi bi\u1ebfn d\u1ea1ng c\u1ee7a cacbua vonfram, \u0111\u1ec1 xu\u1ea5t r\u1eb1ng h\u1ec7 th\u1ed1ng tr\u01b0\u1ee3t ch\u00ednh c\u1ee7a pha WC c\u00f3 th\u1ec3 t\u1ea1o ra s\u1ef1 bi\u1ebfn d\u1ea1ng c\u1ee7a thanh n\u00e9n \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, trong khi vi\u1ec7c k\u00edch ho\u1ea1t h\u1ec7 th\u1ed1ng tr\u01b0\u1ee3t m\u1edbi \u1edf nhi\u1ec7t \u0111\u1ed9 cao c\u00f3 th\u1ec3 cung c\u1ea5p s\u1ef1 \u0111\u00f3ng g\u00f3p c\u1ee7a nh\u1ef1a, v\u1ec1 m\u1eb7t \u0111\u1ecbnh l\u01b0\u1ee3ng cho th\u1ea5y m\u1ed1i quan h\u1ec7 gi\u1eefa bi\u1ebfn d\u1ea1ng d\u1ebbo c\u1ee7a cacbua vonfram v\u00e0 s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng tr\u01b0\u1ee3t v\u00e0 tr\u1eadt kh\u1edbp c\u0169ng nh\u01b0 quy lu\u1eadt thay \u0111\u1ed5i theo nhi\u1ec7t \u0111\u1ed9. Trong kh\u00eda c\u1ea1nh t\u00ednh to\u00e1n m\u00f4 ph\u1ecfng, h\u00e0nh vi c\u01a1 h\u1ecdc c\u1ee7a cacbua vonfram v\u00e0 \u0111a tinh th\u1ec3 \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed9ng l\u1ef1c ph\u00e2n t\u1eed v\u00e0 c\u01a1 ch\u1ebf vi m\u00f4 \u1ea3nh h\u01b0\u1edfng c\u1ee7a ranh gi\u1edbi h\u1ea1t, ranh gi\u1edbi pha, khuy\u1ebft t\u1eadt n\u1ed9i s\u1ecd v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t tr\u00ean bi\u1ebfn d\u1ea1ng v\u00e0 h\u00e0nh vi g\u00e3y c\u1ee7a cacbua vonfram \u0111\u00e3 \u0111\u01b0\u1ee3c l\u00e0m r\u00f5 tr\u00ean quy m\u00f4 nguy\u00ean t\u1eed. \u1ede quy m\u00f4 \u0111i\u1ec7n t\u1eed, m\u1eadt \u0111\u1ed9 \u0111i\u1ec7n t\u1eed c\u1ee7a tr\u1ea1ng th\u00e1i v\u00e0 d\u1ea1ng li\u00ean k\u1ebft c\u1ee7a WC \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n v\u00e0 ph\u00e2n t\u00edch theo nguy\u00ean t\u1eafc \u0111\u1ea7u ti\u00ean, v\u00e0 c\u01a1 ch\u1ebf vi m\u00f4 c\u00f3 \u0111\u1ed9 c\u1ee9ng cao c\u1ee7a WC \u0111\u01b0\u1ee3c l\u00e0m r\u00f5.<\/strong><\/p>\n\n\n\n

Ng\u01b0\u1eddi ta \u0111\u1ec1 xu\u1ea5t r\u1eb1ng m\u00f4 \u0111un \u0111\u00e0n h\u1ed3i v\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a WC c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n h\u01a1n n\u1eefa b\u1eb1ng dung d\u1ecbch vi r\u1eafn c\u1ee7a c\u00e1c nguy\u00ean t\u1ed1 kim lo\u1ea1i c\u00f3 ch\u1ee9c n\u0103ng l\u00e0m vi\u1ec7c cao, v\u00e0 sau \u0111\u00f3, \u0111\u1ed9 c\u1ee9ng cao h\u01a1n c\u1ee7a dung d\u1ecbch kh\u1ed1i kh\u00f4ng pha WC \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p th\u00e0nh c\u00f4ng trong th\u00ed nghi\u1ec7m. N\u0103m 2019, ti\u1ebfn tr\u00ecnh nghi\u00ean c\u1ee9u tr\u00ean \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 trong ba b\u00e0i b\u00e1o li\u00ean ti\u1ebfp tr\u00ean t\u1ea1p ch\u00ed n\u1ed5i ti\u1ebfng qu\u1ed1c t\u1ebf Crystal t\u1ea1p ch\u00ed: Acta crystal. 2019, B75, 134-142 (t\u00e1c gi\u1ea3 \u0111\u1ea7u ti\u00ean l\u00e0 Fang Jing, h\u1ecdc sinh th\u1ea1c s\u0129); Pha l\u00ea Acta. 2019, B75, 994-1002 (t\u00e1c gi\u1ea3 \u0111\u1ea7u ti\u00ean l\u00e0 Ti\u1ebfn s\u0129 LV Hao); Pha l\u00ea Acta. 2019, B75, 1014-1023 (t\u00e1c gi\u1ea3 \u0111\u1ea7u ti\u00ean l\u00e0 Hu Huaxin, nghi\u00ean c\u1ee9u sinh). Tr\u00ean thang \u0111o meso v\u00e0 v\u0129 m\u00f4, m\u1ed9t m\u00f4 h\u00ecnh ph\u1ea7n t\u1eed h\u1eefu h\u1ea1n d\u1ef1a tr\u00ean c\u1ea5u tr\u00fac ba chi\u1ec1u th\u1ef1c s\u1ef1 c\u1ee7a cacbua vonfram \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp. Ph\u1ea3n \u1ee9ng bi\u1ebfn d\u1ea1ng kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t v\u00e0 h\u00e0nh vi bi\u1ebfn d\u1ea1ng d\u1ebbo c\u1ee7a cacbua vonfram d\u01b0\u1edbi s\u1ef1 t\u01b0\u01a1ng t\u00e1c c\u1ee7a \u1ee9ng su\u1ea5t nhi\u1ec7t d\u01b0 \u0111\u00e3 chu\u1ea9n b\u1ecb v\u00e0 \u1ee9ng su\u1ea5t b\u00ean ngo\u00e0i trong qu\u00e1 tr\u00ecnh ch\u1ecbu l\u1ef1c \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u. M\u1ed1i quan h\u1ec7 gi\u1eefa \u0111\u1ed9 b\u1ec1n g\u00e3y bi\u1ebfn d\u1ea1ng h\u00e0nh vi c\u1ea5u tr\u00fac vi m\u00f4 \u0111\u01b0\u1ee3c ti\u1ebft l\u1ed9. Th\u00e0nh t\u00edch n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 trong int. J. plasticity, 2019, 121, 312-323 (t\u00e1c gi\u1ea3 \u0111\u1ea7u ti\u00ean l\u00e0 Ti\u1ebfn s\u0129 Li Yanan).<\/strong><\/p>\n\n\n\n

H\u00ecnh 1. C\u1ea5u tr\u00fac giao di\u1ec7n v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m ti\u1ebfn h\u00f3a c\u1ee7a ranh gi\u1edbi pha WC \/ CO \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh b\u1eb1ng c\u00e1ch th\u00eam VC v\u00e0 Cr3C2<\/strong><\/strong><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

H\u00ecnh 2. \u1ea2nh h\u01b0\u1edfng c\u1ee7a ph\u1ee5 gia, nhi\u1ec7t \u0111\u1ed9 v\u00e0 d\u1ecb h\u01b0\u1edbng n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t \u0111\u1ebfn s\u1ef1 h\u00ecnh th\u00e0nh v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a ranh gi\u1edbi h\u1ea1t n\u0103ng l\u01b0\u1ee3ng th\u1ea5p trong cacbua vonfram <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

H\u00ecnh 3. \u1ea2nh h\u01b0\u1edfng c\u1ee7a lu\u00e2n chuy\u1ec3n h\u1ea1t WC \u0111\u1ebfn bi\u1ebfn d\u1ea1ng vi d\u1ebbo trong cacbua vonfram tinh th\u1ec3 nano <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

H\u00ecnh 4. C\u1ea5u tr\u00fac vi m\u00f4 v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u kh\u1ed1i WC c\u00f3 \u0111\u1ed9 c\u1ee9ng cao m\u1edbi v\u1edbi pha kh\u00f4ng nung<\/p>\n\n\n\n

  • \"\"<\/figure><\/li><\/ul><\/figure>\n\n\n\n

    H\u00ecnh 5. C\u00e1c ph\u1ea3n \u1ee9ng tr\u1eadt kh\u1edbp \u0111i\u1ec3n h\u00ecnh (bao g\u1ed3m ph\u00e2n r\u00e3 tr\u1eadt kh\u1edbp, h\u00ecnh th\u00e0nh c\u00e1c tr\u1eadt kh\u1edbp thanh n\u00e9n, v.v.) tr\u00ean m\u1eb7t ph\u1eb3ng c\u01a1 s\u1edf WC v\u00e0 m\u1eb7t ph\u1eb3ng tr\u01b0\u1ee3t ch\u00ednh tr\u00ean xi lanh<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    H\u00ecnh 6. \u1ea2nh h\u01b0\u1edfng c\u1ee7a ph\u1ea3n \u1ee9ng bi\u1ebfn d\u1ea1ng kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t l\u00ean h\u00e0nh vi g\u00e3y c\u1ee7a cacbua vonfram trong qu\u00e1 tr\u00ecnh n\u00e9n<\/p>\n\n\n\n

    \"\"<\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Due to its high hardness and wear resistance, tungsten carbide  is widely used as a variety of processing tool materials, known as “industrial teeth”. Among them, WC Co tungsten carbide  is the largest production and consumption of tungsten carbide  materials. After decades of development, in the engineering application of tungsten carbide , the hardness and…<\/p>","protected":false},"author":2,"featured_media":13907,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[],"jetpack_featured_media_url":"https:\/\/www.meetyoucarbide.com\/wp-content\/uploads\/2020\/03\/\u56fe\u72471.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/13906"}],"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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/comments?post=13906"}],"version-history":[{"count":0,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/posts\/13906\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media\/13907"}],"wp:attachment":[{"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/media?parent=13906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/categories?post=13906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.meetyoucarbide.com\/vi\/wp-json\/wp\/v2\/tags?post=13906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}