A szil\u00edciumkarbid, m\u00e1s n\u00e9ven karborundum\/karbornm\/ a szil\u00edcium \u00e9s a sz\u00e9n rendk\u00edv\u00fcl kem\u00e9ny \u00e9s tart\u00f3s krist\u00e1lyos vegy\u00fclete, amelyet a 19. sz\u00e1zad v\u00e9ge \u00f3ta r\u00e9g\u00f3ta ipari anyagk\u00e9nt haszn\u00e1lnak.<\/p>\n
B\u00e1r a term\u00e9szetben el\u0151fordul\u00f3 moissanit megtal\u00e1lhat\u00f3 meteoritokban \u00e9s kimberlit lel\u0151helyeken, a legt\u00f6bb SiC-et ma m\u00e1r szintetikusan \u00e1ll\u00edtj\u00e1k el\u0151, vagy sz\u00e9n olvasztott szil\u00edciumba old\u00e1s\u00e1val, vagy k\u00e9miai g\u0151zf\u00e1zis\u00fa lev\u00e1laszt\u00e1si elj\u00e1r\u00e1sokkal.<\/p>\n
A szil\u00edciumkarbid kiv\u00e1l\u00f3 h\u0151vezet\u0151 k\u00e9pess\u00e9ge lehet\u0151v\u00e9 teszi, hogy ellen\u00e1lljon a magas \u00fczemi h\u0151m\u00e9rs\u00e9kletnek. Ez a tulajdons\u00e1ga seg\u00edt a h\u0151 gyors \u00e9s hat\u00e9kony elvezet\u00e9s\u00e9ben, megv\u00e9dve azt az olvad\u00e1st\u00f3l vagy t\u00f6r\u00e9st\u0151l ig\u00e9nyes k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt.<\/p>\n
V\u00e9di a berendez\u00e9seket a kop\u00e1s \u00e9s elhaszn\u00e1l\u00f3d\u00e1s ellen, \u00e9s seg\u00edt meghosszabb\u00edtani az \u00e9lettartamukat. Alacsony h\u0151t\u00e1gul\u00e1si egy\u00fctthat\u00f3j\u00e1nak \u00e9s kiv\u00e1l\u00f3 kem\u00e9nys\u00e9g\u00e9nek k\u00f6sz\u00f6nhet\u0151en alacsony h\u0151t\u00e1gul\u00e1si egy\u00fctthat\u00f3ja ellen\u00e1ll\u00f3v\u00e1 teszi a mechanikai ig\u00e9nybev\u00e9telekkel, p\u00e9ld\u00e1ul a s\u00farl\u00f3d\u00e1ssal \u00e9s a kop\u00e1ssal szemben is.<\/p>\n
A fekete szil\u00edciumkarbid por szorosan szab\u00e1lyozott szemcsem\u00e9rettel rendelkezik, amely kiv\u00e9teles v\u00e1g\u00e1si sebess\u00e9get \u00e9s fel\u00fcleti fel\u00fcletet biztos\u00edt, \u00edgy sz\u00e1mos alkalmaz\u00e1shoz alkalmas, p\u00e9ld\u00e1ul \u00fcvegezett \u00e9s rezinoid csiszol\u00f3korongokhoz, sug\u00e1rz\u00f3 szemcs\u00e9khez\/por kever\u00e9kekhez, vegy\u00fcletekhez, sim\u00edt\u00f3 pol\u00edroz\u00e1shoz cs\u00fasz\u00e1smentes \u00e9s dr\u00f3tf\u0171r\u00e9szel\u00e9shez szil\u00edcium \u00e9s kvarc.<\/p>\n
A karborundum-nyomtat\u00e1s, egy hagyom\u00e1nyos kollagrafikus nyomdatechnika, amelynek sor\u00e1n alum\u00edniumlemezre karborundumszemcs\u00e9t visznek fel \u00e9s festenek, majd g\u00f6rd\u00fcl\u0151\u00e1gyas pr\u00e9sen kereszt\u00fclfuttatj\u00e1k, hogy organikus text\u00far\u00e1j\u00fa, a tart\u00f3ss\u00e1got bemutat\u00f3 nyomatokat k\u00e9sz\u00edtsenek a pap\u00edrra.<\/p>\n
A SiC rendk\u00edv\u00fcl kem\u00e9ny anyag (a Mohs-sk\u00e1l\u00e1n 9-es). Ezenk\u00edv\u00fcl kop\u00e1s\u00e1ll\u00f3s\u00e1ga miatt alkalmas a sportkocsik ker\u00e1mia f\u00e9kt\u00e1rcs\u00e1inak \u00e9s goly\u00f3\u00e1ll\u00f3 mell\u00e9nyeinek, valamint a szivatty\u00fatengelyek t\u00f6m\u00edt\u00e9seinek alkalmaz\u00e1s\u00e1ra. Ezenk\u00edv\u00fcl ez az anyag rendk\u00edv\u00fcl magas h\u0151m\u00e9rs\u00e9kletnek is ellen\u00e1ll, mik\u00f6zben m\u00e1s kem\u00e9ny anyagokkal, p\u00e9ld\u00e1ul ac\u00e9llal \u00e9rintkezve s\u00e9rtetlen marad.<\/p>\n
Kiv\u00e1l\u00f3 oxid\u00e1ci\u00f3\u00e1ll\u00f3s\u00e1got mutat 1400 \u00b0C-ig, \u00e9s v\u00edzben, alkoholban \u00e9s savakban - a fluorv\u00edztartalm\u00fa sav kiv\u00e9tel\u00e9vel - nem old\u00f3dik.<\/p>\n
A z\u00f6ld SIC tiszta kovahomokb\u00f3l \u00e9s petr\u00f3leumkokszb\u00f3l k\u00e9sz\u00edthet\u0151, k\u00fcl\u00f6nb\u00f6z\u0151 form\u00e1z\u00e1si m\u00f3dszerekkel feldolgozva \u00e9s magas h\u0151m\u00e9rs\u00e9kleten, elektromos bels\u0151 ellen\u00e1ll\u00e1s\u00fa kemenc\u00e9ben szinterelve, k\u00f6t\u00e9ses \u00e9s reakci\u00f3k\u00f6t\u00e9s\u0171 term\u00e9kek el\u0151\u00e1ll\u00edt\u00e1s\u00e1hoz. A Saint-Gobain Performance Ceramics & Refractories ezt a term\u00e9ket csiszol\u00f3anyagok, koh\u00e1szati, speci\u00e1lis t\u0171z\u00e1ll\u00f3 anyagok, valamint f\u00e9mm\u00e1trix\u00fa kompozitok \u00e9s kemenceb\u00fatorok gy\u00e1rt\u00e1s\u00e1ban alkalmazza - nem megfeledkezve a kompozit p\u00e1nc\u00e9lrendszerek gy\u00e1rt\u00e1s\u00e1r\u00f3l!<\/p>\n
A szil\u00edciumkarbid bizony\u00edtotta tart\u00f3ss\u00e1g\u00e1t az\u00e1ltal, hogy ellen\u00e1llt a sz\u00e9ls\u0151s\u00e9ges k\u00e9miai k\u00f6r\u00fclm\u00e9nyeknek \u00e9s k\u00f6rnyezetnek, p\u00e9ld\u00e1ul a gy\u00e1rakban haszn\u00e1lt csiszol\u00f3korongoknak. Ezenk\u00edv\u00fcl csiszol\u00e1si \u00e9s pol\u00edroz\u00e1si, valamint ipari v\u00e1g\u00e1si \u00e9s f\u00far\u00e1si feladatokra haszn\u00e1lj\u00e1k; emellett nagy kop\u00e1s\u00e1ll\u00f3s\u00e1ggal rendelkezik, ami alkalmass\u00e1 teszi a koh\u00e1szati alkalmaz\u00e1sokban val\u00f3 felhaszn\u00e1l\u00e1sra.<\/p>\n
A 19. sz\u00e1zad v\u00e9ge \u00f3ta a szilikongumit olyan alkalmaz\u00e1sokban haszn\u00e1lj\u00e1k, mint a csiszol\u00f3anyagok \u00e9s csiszol\u00f3szersz\u00e1mok, valamint a t\u0171z\u00e1ll\u00f3 b\u00e9l\u00e9sek \u00e9s kemencehengerek. Kiv\u00e9teles h\u0151m\u00e9rs\u00e9klet- \u00e9s h\u0151\u00e1ll\u00f3s\u00e1gi tulajdons\u00e1gai miatt a szilikongumi kiv\u00e1l\u00f3 anyagv\u00e1laszt\u00e1s a rep\u00fcl\u0151g\u00e9pipari alkalmaz\u00e1sokhoz.<\/p>\n
A szil\u00edciumkarbid port szil\u00edcium-dioxid-homok \u00e9s sz\u00e9nalap\u00fa koksz elektromos ellen\u00e1ll\u00e1skemenc\u00e9ben 2500 \u00b0C-on t\u00f6rt\u00e9n\u0151 megolvaszt\u00e1s\u00e1val, majd \u0151rl\u00e9ssel vagy szil\u00e1rd t\u00e1rgyakk\u00e1 alak\u00edt\u00e1s\u00e1val lehet el\u0151\u00e1ll\u00edtani. Nagyobb egykrist\u00e1lyok tiszta szil\u00edciumb\u00f3l \u00e9s sz\u00e9ng\u0151zb\u0151l 3500 \u00b0C-on, extr\u00e9m v\u00e1kuumban n\u00f6veszthet\u0151k - hasonl\u00f3 elj\u00e1r\u00e1sokkal, mint a f\u00e9lvezet\u0151 osty\u00e1k eset\u00e9ben. L\u00e9teznek polimorfok, azaz k\u00fcl\u00f6nb\u00f6z\u0151 krist\u00e1lyszerkezet\u0171 szerkezetek, amelyek atomszerkezet\u00fckt\u0151l f\u00fcgg\u0151en alfa- vagy b\u00e9ta-alak\u00faak; az alfa-alak\u00faak jellemz\u0151en hexagon\u00e1lisak (wurtzit).<\/p>\n
A szil\u00edciumkarbid, egy nem oxidker\u00e1mia anyag, amely k\u00e9pes ellen\u00e1llni a magas h\u0151m\u00e9rs\u00e9kletnek \u00e9s a kop\u00e1snak. Mint ilyen, m\u00e1r r\u00e9g\u00f3ta haszn\u00e1lj\u00e1k csiszol\u00e1si, \u00e9lez\u00e9si \u00e9s homokf\u00fav\u00e1si folyamatokban, valamint a rep\u00fcl\u0151g\u00e9piparban \u00e9s az aut\u00f3iparban is gyakran alkalmazz\u00e1k csiszol\u00f3anyagk\u00e9nt k\u00fcl\u00f6nb\u00f6z\u0151 anyagok pol\u00edroz\u00e1s\u00e1ra.<\/p>\n
Az alum\u00ednium nem reag\u00e1l savakkal \u00e9s 1600 fokos h\u0151m\u00e9rs\u00e9kletig. Tetra\u00e9deres krist\u00e1lyszerkezet\u00e9nek k\u00f6sz\u00f6nhet\u0151en bizonyos k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt ellen\u00e1ll az oxid\u00e1ci\u00f3nak - ha azonban hosszabb ideig magas oxig\u00e9nkoncentr\u00e1ci\u00f3nak van kit\u00e9ve, gyorsan oxid\u00e1l\u00f3dhat.<\/p>\n
Az \u00e1tkrist\u00e1lyos\u00edt\u00e1s, a forr\u00f3 pr\u00e9sel\u00e9s, a mikrohull\u00e1m\u00fa szinterez\u00e9s, a nyom\u00e1s n\u00e9lk\u00fcli szinterez\u00e9s \u00e9s a reakci\u00f3szinterez\u00e9s a k\u00fcl\u00f6nb\u00f6z\u0151 form\u00e1j\u00fa \u00e9s m\u00e9ret\u0171 ker\u00e1mia el\u0151\u00e1ll\u00edt\u00e1s\u00e1ra rendelkez\u00e9sre \u00e1ll\u00f3 k\u00fcl\u00f6nb\u00f6z\u0151 m\u00f3dszerek k\u00f6z\u00e9 tartozik. A ker\u00e1mi\u00e1t sz\u00e9les k\u00f6rben haszn\u00e1lj\u00e1k a h\u0151ig\u00e9nyes t\u0171z\u00e1ll\u00f3 anyagok \u00e9s a goly\u00f3\u00e1ll\u00f3 p\u00e1nc\u00e9lok alkatr\u00e9szek\u00e9nt haszn\u00e1lt ker\u00e1mi\u00e1k r\u00e9szek\u00e9nt; emellett merevs\u00e9ge \u00e9s szil\u00e1rds\u00e1ga alkalmass\u00e1 teszi csillag\u00e1szati t\u00e1vcs\u0151t\u00fckr\u00f6kh\u00f6z is.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide, also referred to as carborundum\/karbornm\/ is an exceptionally hard and durable crystalline compound of silicon and carbon that […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[5],"tags":[],"class_list":["post-40","post","type-post","status-publish","format-standard","hentry","category-product-related"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts\/40","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/comments?post=40"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts\/40\/revisions"}],"predecessor-version":[{"id":41,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/posts\/40\/revisions\/41"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/media?parent=40"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/categories?post=40"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/hu\/wp-json\/wp\/v2\/tags?post=40"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}