Tr\u01b0\u1edbc m\u1eb7t b\u1ea1n l\u00e0 h\u00f2n \u0111\u00e1 ho\u1eb7c m\u1ea9u s\u1eaft, l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c n\u00f3 l\u00e0 v\u1eabn th\u1ea1ch, l\u00e0 di\u00eam th\u1ea1ch hay s\u1eaft t\u1ef1 nhi\u00ean?<\/p>\n\n\n\n
C\u0103n c\u1ee9 th\u00e0nh ph\u1ea7n ch\u1ea5t kh\u00e1c nhau, v\u1eabn th\u1ea1ch c\u00f3 th\u1ec3 chia l\u00e0m 3 lo\u1ea1i: v\u1eabn th\u1ea1ch, v\u1eabn s\u1eaft, v\u00e0 v\u1eabn th\u1ea1ch s\u1eaft.<\/p>\n\n\n\n
V\u1eabn th\u1ea1ch khi bay v\u00e0o t\u1ea7ng kh\u00ed quy\u1ec3n, v\u00ec ma s\u00e1t m\u1ea1nh v\u1edbi kh\u00f4ng kh\u00ed m\u00e0 nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 n\u00f3ng \u0111\u1ebfn m\u1ea5y ngh\u00ecn \u0111\u1ed9. D\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 cao b\u1ec1 m\u1eb7t thi\u00ean th\u1ea1ch ch\u1ea3y ra v\u00e0 th\u00e0nh ch\u1ea5t l\u1ecfng. V\u1ec1 sau v\u00ec g\u1eb7p ph\u1ea3i t\u1ea7ng kh\u00f4ng kh\u00ed g\u1ea7n m\u1eb7t \u0111\u1ea5t d\u00e0y \u0111\u1eb7c ng\u0103n c\u1ea3n cho n\u00ean t\u1ed1c \u0111\u1ed9 c\u1ee7a n\u00f3 gi\u1ea3m d\u1ea7n, b\u1ec1 m\u1eb7t n\u00f3ng ch\u1ea3y ngu\u1ed9i \u0111i h\u00ecnh th\u00e0nh m\u1ed9t t\u1ea7ng v\u1ecf m\u1ecfng g\u1ecdi l\u00e0 l\u1edbp v\u1ecf n\u00f3ng ch\u1ea3y. L\u1edbp v\u1ecf n\u00f3ng ch\u1ea3y r\u1ea5t m\u1ecfng n\u00f3i chung ch\u1ec9 kho\u1ea3ng 1 mm, m\u00e0u \u0111en, ho\u1eb7c m\u00e0u n\u00e2u \u0111en. Trong qu\u00e1 tr\u00ecnh b\u1ec1 v\u1ecf n\u00f3ng ch\u1ea3y ngu\u1ed9i \u0111i, do s\u1ef1 l\u01b0u \u0111\u1ed9ng c\u1ee7a kh\u00f4ng kh\u00ed m\u00e0 tr\u00ean b\u1ec1 m\u1eb7t v\u1eabn th\u1ea1ch c\u00f3 m\u1ed9t l\u1edbp h\u1eb1n l\u01b0u l\u1ea1i g\u1ecdi l\u00e0 d\u1ea5u \u1ea5n kh\u00f4ng kh\u00ed. H\u00ecnh d\u1ea1ng c\u1ee7a d\u1ea5u \u1ea5n kh\u00f4ng kh\u00ed gi\u1ed1ng nh\u01b0 v\u00e2n tay in tr\u00ean v\u1eefa b\u1ed9t l\u00e0m b\u00e1nh.<\/p>\n\n\n\n
B\u1ec1 m\u1eb7t n\u00f3ng ch\u1ea3y v\u00e0 d\u1ea5u \u1ea5n kh\u00f4ng kh\u00ed l\u00e0 nh\u1eefng \u0111\u1eb7c tr\u01b0ng ch\u1ee7 y\u1ebfu c\u1ee7a b\u1ec1 m\u1eb7t v\u1eabn th\u1ea1ch. N\u1ebfu b\u1ea1n nh\u00ecn th\u1ea5y nh\u1eefng h\u00f2n \u0111\u00e1 ho\u1eb7c nh\u1eefng m\u1ea9u s\u1eaft c\u00f3 b\u1ec1 m\u1eb7t nh\u01b0 th\u1ebf th\u00ec c\u00f3 th\u1ec3 ph\u00e1n \u0111o\u00e1n \u0111\u00f3 l\u00e0 m\u1eabu v\u1eabn th\u1ea1ch.<\/p>\n\n\n\n
Nh\u01b0ng m\u1ed9t s\u1ed1 v\u1eabn th\u1ea1ch do r\u01a1i xu\u1ed1ng \u0111\u1ea5t \u0111\u00e3 l\u00e2u ng\u00e0y, b\u1ecb m\u01b0a gi\u00f3, \u00e1nh n\u1eafng l\u00e0m cho b\u1ec1 m\u1eb7t bong ra, d\u1ea5u \u1ea5n c\u1ee7a kh\u00f4ng kh\u00ed c\u0169ng kh\u00f4ng d\u1ec5 nh\u1eadn \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n
Nh\u01b0ng kh\u00f4ng h\u1ec1 g\u00ec, c\u00f2n c\u00f3 nh\u1eefng bi\u1ec7n ph\u00e1p kh\u00e1c \u0111\u1ec3 ph\u00e2n bi\u1ec7t ch\u00fang.<\/p>\n\n\n\n
H\u00ecnh d\u1ea1ng c\u1ee7a v\u1eabn th\u1ea1ch r\u1ea5t gi\u1ed1ng v\u1edbi h\u00f2n \u0111\u00e1 tr\u00ean Tr\u00e1i \u0110\u1ea5t, nh\u01b0ng d\u00f9ng tay nh\u1ea5c l\u00ean c\u1ea3m gi\u00e1c n\u00f3 n\u1eb7ng h\u01a1n h\u00f2n \u0111\u00e1 c\u00f3 c\u00f9ng th\u1ec3 t\u00edch. V\u1ea9n th\u1ea1ch n\u00f3i chung ch\u1ee9a m\u1ea5y ph\u1ea7n tr\u0103m s\u1eaft, c\u00f3 t\u1eeb t\u00ednh. N\u1ebfu d\u00f9ng \u0111\u00e1 nam ch\u00e2m th\u1eed s\u1ebd bi\u1ebft \u0111\u01b0\u1ee3c. Ngo\u00e0i ra xem k\u1ef9 h\u01a1n m\u1eb7t c\u1eaft c\u1ee7a v\u1eabn th\u1ea1ch s\u1ebd ph\u00e1t hi\u1ec7n c\u00f3 nh\u1eefng h\u1ea1t h\u00ecnh c\u1ea7u nh\u1ecf, k\u00edch th\u01b0\u1edbc c\u1ee7a h\u1ea1t n\u00f3i chung kho\u1ea3ng 1 mm, c\u0169ng c\u00f3 l\u00fac t\u1eeb 2 – 3 mm. 90% v\u1eabn th\u1ea1ch c\u00f3 nh\u1eefng h\u1ea1t nh\u01b0 th\u1ebf. Ch\u00fang l\u00e0 nh\u1eefng h\u1ea1t s\u1ea3n sinh ra trong qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh v\u1eabn th\u1ea1ch, l\u00e0 ti\u00eau ch\u00ed quan tr\u1ecdng \u0111\u1ec3 nh\u1eadn ra v\u1eabn th\u1ea1ch.<\/p>\n\n\n\n
Th\u00e0nh ph\u1ea7n ch\u1ee7 y\u1ebfu c\u1ee7a v\u1eabn s\u1eaft l\u00e0 s\u1eaft v\u00e0 niken, trong \u0111\u00f3 s\u1eaft chi\u1ebfm kho\u1ea3ng 90%, niken kho\u1ea3ng 4% – 8%. H\u00e0m l\u01b0\u1ee3ng niken trong s\u1eaft t\u1ef1 nhi\u00ean tr\u00ean Tr\u00e1i \u0110\u1ea5t kh\u00f4ng nhi\u1ec1u \u0111\u1ebfn th\u1ebf.<\/p>\n\n\n\n
C\u00f3 nh\u1eefng v\u1eabn s\u1eaft sau khi d\u00f9ng dung d\u1ecbch ch\u1ee9a 5% ax\u00edt sunphuric \u0111\u1ec3 r\u1eeda m\u1eb7t c\u1eaft ngang th\u00ec \u0111\u1ed9 s\u00e1ng c\u1ee7a b\u1ec1 m\u1eb7t hi\u1ec7n ra nhi\u1ec1u \u0111\u01b0\u1eddng v\u00e2n \u0111\u1eb7c bi\u1ec7t, gi\u1ed1ng nh\u01b0 nh\u1eefng \u00f4 car\u00f4. Tr\u1eeb nh\u1eefng v\u1eabn th\u1ea1ch ch\u1ee9a \u0111\u1eb7c bi\u1ec7t nhi\u1ec1u niken, c\u00f2n \u0111a s\u1ed1 \u0111\u1ec1u hi\u1ec7n nh\u1eefng \u0111\u01b0\u1eddng v\u00e2n nh\u01b0 th\u1ebf. \u0110\u00f3 l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u1ee7 y\u1ebfu \u0111\u1ec3 nh\u1eadn ra v\u1eabn s\u1eaft.<\/p>\n\n\n\n
V\u1eabn \u0111\u00e1 s\u1eaft r\u1ea5t \u00edt g\u1eb7p. N\u00f3 g\u1ed3m \u0111\u00e1 v\u00e0 s\u1eaft c\u1ea5u t\u1ea1o th\u00e0nh, h\u00e0m l\u01b0\u1ee3ng hai lo\u1ea1i t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nhau v\u00e0 c\u00f2n c\u00f3 m\u1ed9t \u00edt mu\u1ed1i kho\u00e1ng c\u1ee7a ax\u00edt silic.<\/p>\n\n\n\n
Th\u00f4ng qua m\u1ea5y bi\u1ec7n ph\u00e1p tr\u00ean \u0111\u00e2y ra c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c v\u1eabn th\u1ea1ch v\u1edbi c\u00e1c lo\u1ea1i \u0111\u00e1 \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh tr\u00ean Tr\u00e1i \u0110\u1ea5t.<\/p>\n\n\n\n
V\u1eabn th\u1ea1ch l\u00e0 ti\u00eau b\u1ea3n thi\u00ean th\u1ec3 qu\u00fd b\u00e1u, ta n\u00ean ch\u00fa \u00fd thu th\u1eadp v\u00e0 b\u1ea3o qu\u1ea3n \u0111\u1ec3 “nh\u1eefng kh\u00e1ch t\u1eeb ngo\u00e0i b\u1ea7u tr\u1eddi” n\u00e0y s\u1ebd cung c\u1ea5p nh\u1eefng th\u00f4ng tin khoa h\u1ecdc quan tr\u1ecdng cho lo\u00e0i ng\u01b0\u1eddi.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: V\u1eabn th\u1ea1ch; V\u1eabn s\u1eaft; V\u1eabn th\u1ea1ch s\u1eaft.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Tr\u01b0\u1edbc m\u1eb7t b\u1ea1n l\u00e0 h\u00f2n \u0111\u00e1 ho\u1eb7c m\u1ea9u s\u1eaft, l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c n\u00f3 l\u00e0 v\u1eabn th\u1ea1ch, l\u00e0 di\u00eam th\u1ea1ch hay s\u1eaft t\u1ef1 nhi\u00ean? C\u0103n c\u1ee9 th\u00e0nh ph\u1ea7n ch\u1ea5t kh\u00e1c nhau, v\u1eabn th\u1ea1ch c\u00f3 th\u1ec3 chia l\u00e0m 3 lo\u1ea1i: v\u1eabn th\u1ea1ch, v\u1eabn s\u1eaft, v\u00e0 v\u1eabn th\u1ea1ch s\u1eaft. V\u1eabn th\u1ea1ch […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,7],"tags":[],"class_list":["post-6905","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/6905","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=6905"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/6905\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=6905"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=6905"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=6905"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}