Karbid krem\u00edka je \u010doraz ob\u013e\u00fabenej\u0161\u00ed materi\u00e1l v\u010faka svojim skvel\u00fdm mechanick\u00fdm, tepeln\u00fdm a elektrick\u00fdm vlastnostiam. Rekry\u0161talizovan\u00fd karbid krem\u00edka m\u00e1 v\u010faka svojej mikro\u0161trukt\u00fare jedine\u010dn\u00e9 vlastnosti.<\/p>\n
RSiC sa \u010dasto pou\u017e\u00edva v n\u00e1bytku do pec\u00ed a keramick\u00fdch v\u00fdrobkoch, ako s\u00fa \u017eiaruvzdorn\u00e9 materi\u00e1ly, v priemysle odoln\u00e9 proti opotrebovaniu a v priemyseln\u00fdch vysokoteplotn\u00fdch peciach v\u010faka svojej vynikaj\u00facej odolnosti proti kor\u00f3zii a teplotnej odolnosti.<\/p>\n
Vynikaj\u00faca pevnos\u0165 rekry\u0161talizovan\u00e9ho karbidu krem\u00edka pri vysok\u00fdch teplot\u00e1ch z neho rob\u00ed vynikaj\u00facu vo\u013ebu materi\u00e1lu pre aplik\u00e1cie, kde materi\u00e1ly musia odol\u00e1va\u0165 extr\u00e9mne n\u00e1ro\u010dn\u00fdm prostrediam, na rozdiel od keramiky, ktor\u00e1 sa pri vy\u0161\u0161\u00edch teplot\u00e1ch st\u00e1va menej pevnou. Okrem toho jeho mikro\u0161trukt\u00fara pom\u00e1ha odol\u00e1va\u0165 kor\u00f3zii. Rekry\u0161talizovan\u00fd karbid krem\u00edka m\u00e1 po\u010detn\u00e9 priemyseln\u00e9 vyu\u017eitie vr\u00e1tane n\u00e1bytku do pec\u00ed, val\u010dekov\/priestrann\u00fdch dosiek\/priestrann\u00fdch dosiek\/priestrann\u00fdch dosiek, ako aj pancierov\u00fdch dosiek pou\u017e\u00edvan\u00fdch proti s\u00fa\u010dasn\u00fdm alebo vznikaj\u00facim balistick\u00fdm hrozb\u00e1m.<\/p>\n
Karborundov\u00e1 technika tla\u010de, met\u00f3da h\u013abkotla\u010de, tie\u017e vyu\u017e\u00edva karborundov\u00fa dr\u0165. Po zmie\u0161an\u00ed s vodou na vytvorenie pasty sa nanesie na hlin\u00edkov\u00fa dosku a potom sa z hol\u00fdch pl\u00f4ch zotrie vodou, \u010d\u00edm sa zanech\u00e1 kone\u010dn\u00e1 vytla\u010den\u00e1 stopa, ktor\u00e1 sa potom valcuje, aby sa vytvoril kone\u010dn\u00fd produkt.<\/p>\n
V porovnan\u00ed so \u017eiaruvzdorn\u00fdmi materi\u00e1lmi s oxidovou v\u00e4zbou na b\u00e1ze karbidu krem\u00edka maj\u00fa nitridov\u00e9 \u017eiaruvzdorn\u00e9 materi\u00e1ly vy\u0161\u0161iu tepeln\u00fa vodivos\u0165 a v\u00e4\u010d\u0161iu odolnos\u0165 vo\u010di oxid\u00e1cii a tvorbe trosky, odolnos\u0165 vo\u010di n\u00e1razom a \u00faderom a m\u00f4\u017eu sa dokonca pou\u017e\u00edva\u0165 v peciach s r\u00fdchlej\u0161\u00edm v\u00fdpalom, aby sa zv\u00fd\u0161ilo vyu\u017eitie pri s\u00fa\u010dasnom zn\u00ed\u017een\u00ed jednotkov\u00fdch n\u00e1kladov na energiu.<\/p>\n
Karbid krem\u00edka sa m\u00f4\u017ee vyr\u00e1ba\u0165 r\u00f4znymi met\u00f3dami vr\u00e1tane reak\u010dn\u00e9ho spekania, beztlakov\u00e9ho spekania karbidu krem\u00edka a samospekania. Reak\u010dn\u00fdm spekan\u00edm sa z\u00edskavaj\u00fa hust\u00e9 materi\u00e1ly s dobrou \u010distotou a odolnos\u0165ou vo\u010di tepeln\u00fdm \u0161okom, ale je \u0165a\u017ek\u00e9 kontrolova\u0165 ve\u013ekos\u0165 \u010dast\u00edc. Karbid b\u00f3ru ako zdroj uhl\u00edka m\u00f4\u017ee pom\u00f4c\u0165 vyhn\u00fa\u0165 sa rozkladu polym\u00e9ru a z\u00e1rove\u0148 eliminova\u0165 p\u00f3ry v zelen\u00fdch teles\u00e1ch; spekanie v kvapalnej f\u00e1ze m\u00f4\u017ee tie\u017e zlep\u0161i\u0165 r\u00fdchlos\u0165 v\u00fdroby.<\/p>\n
Rekry\u0161talizovan\u00fd karbid krem\u00edka vynik\u00e1 ako ide\u00e1lny materi\u00e1l pre aplik\u00e1cie odoln\u00e9 vo\u010di opotrebovaniu v\u010faka kombin\u00e1cii pevnosti a odolnosti vo\u010di kor\u00f3zii, v\u010faka \u010domu je vhodn\u00fd pre tesnenia chemick\u00fdch \u010derpadiel, ako aj pre in\u00e9 n\u00e1ro\u010dn\u00e9 prostredia. Okrem toho jeho n\u00edzka tepeln\u00e1 roz\u0165a\u017enos\u0165 zni\u017euje riziko vypl\u00fdvaj\u00face z r\u00fdchlych ochladzovan\u00ed\/zmen\u00e1ch teploty, zatia\u013e \u010do jeho vysok\u00e1 tvrdos\u0165 ho rob\u00ed vhodn\u00fdm ako lo\u017eiskov\u00e9 komponenty v lo\u017eiskov\u00fdch syst\u00e9moch - pou\u017e\u00edva sa dokonca na v\u00fdrobu r\u00f4znych tvarov, ako s\u00fa vstrekova\u010de pou\u017e\u00edvan\u00e9 pri aplik\u00e1ci\u00e1ch pieskovania, tesnenia vodn\u00fdch \u010derpadiel automobilov a lo\u017eiskov\u00e9 komponenty.<\/p>\n
RSiC je vynikaj\u00faci elektrick\u00fd izolant, ktor\u00fd odol\u00e1va vysok\u00fdm teplot\u00e1m, \u010do z neho rob\u00ed ide\u00e1lny materi\u00e1l na vymurovanie ve\u013ek\u00fdch vysok\u00fdch pec\u00ed. Okrem toho je v\u010faka svojej odolnosti proti opotrebovaniu vhodn\u00fd pre potrubia, obe\u017en\u00e9 koles\u00e1 a cykl\u00f3ny; liatina m\u00e1 v t\u00fdchto aplik\u00e1ci\u00e1ch tendenciu r\u00fdchlo sa opotrebov\u00e1va\u0165, zatia\u013e \u010do dobre odol\u00e1va n\u00e1razom a vibr\u00e1ci\u00e1m, \u010do umo\u017e\u0148uje bansk\u00e9 aplik\u00e1cie.<\/p>\n
Karbid krem\u00edka s nitridovou v\u00e4zbou preuk\u00e1zal v\u00fdnimo\u010dn\u00fa odolnos\u0165 proti opotrebovaniu v \u013eahkej p\u00f4de obsahuj\u00facej sypk\u00fd piesok, pri\u010dom p\u00e4\u0165n\u00e1sobne prekonal typy ocele be\u017ene pou\u017e\u00edvan\u00e9 pre pracovn\u00e9 \u010dasti v p\u00f4de. Karbid krem\u00edka s nitridovou v\u00e4zbou poskytoval aj viac ako \u0161es\u0165n\u00e1sobne vy\u0161\u0161iu odolnos\u0165 proti opotrebovaniu v podmienkach stredne \u0165a\u017ekej a \u0165a\u017ekej p\u00f4dy, \u010do z neho robilo vynikaj\u00facu vo\u013ebu materi\u00e1lu pre v\u00fdpl\u0148ov\u00e9 vrstvy zvarov; jeho odolnos\u0165 proti opotrebovaniu sa menila v z\u00e1vislosti od podmienok p\u00f4dy.<\/p>\n
RSiC sa vyzna\u010duje vysokou tepelnou vodivos\u0165ou, \u010do z neho rob\u00ed vynikaj\u00faci materi\u00e1l pre vysokoteplotn\u00e9 aplik\u00e1cie. Tento materi\u00e1l, ktor\u00fd dok\u00e1\u017ee odol\u00e1va\u0165 teplot\u00e1m a\u017e do 1 600 \u00b0C, pri\u010dom jeho pevnos\u0165 zost\u00e1va kon\u0161tantn\u00e1, sa d\u00e1 tie\u017e \u013eahko formova\u0165 do r\u00f4znych tvarov, aby vyhovoval konkr\u00e9tnym aplik\u00e1ci\u00e1m - pri pr\u00e1ci s n\u00edm mo\u017eno pou\u017ei\u0165 v\u00fdrobn\u00e9 met\u00f3dy vr\u00e1tane klzn\u00e9ho odlievania, vytl\u00e1\u010dania a vstrekovania.<\/p>\n
RSiC sa m\u00f4\u017ee pochv\u00e1li\u0165 vynikaj\u00facou tepelnou vodivos\u0165ou v\u010faka svojej n\u00edzkej hustote a p\u00f3rovitej \u0161trukt\u00fare, ktor\u00e1 umo\u017e\u0148uje zachyt\u00e1vanie molek\u00fal plynnej f\u00e1zy na zadr\u017eiavanie tepla a z\u00e1rove\u0148 odol\u00e1va kor\u00f3znym procesom, ako je oxid\u00e1cia alebo in\u00e9 kor\u00f3zne procesy. Okrem toho sa tento materi\u00e1l vyzna\u010duje ni\u017e\u0161\u00edm bodom topenia ako v\u00e4\u010d\u0161ina technickej keramiky, \u010do z neho rob\u00ed bezpe\u010dnej\u0161\u00ed materi\u00e1l, s ktor\u00fdm sa d\u00e1 pracova\u0165.<\/p>\n
V\u010faka tomu, \u017ee sa d\u00e1 formova\u0165 pod\u013ea \u0161pecifick\u00fdch po\u017eiadaviek, je to vynikaj\u00faci materi\u00e1l na pou\u017eitie v tunelov\u00fdch peciach, kyvadlov\u00fdch peciach, dvojit\u00fdch valcov\u00fdch peciach a link\u00e1ch na v\u00fdrobu porcel\u00e1nov\u00fdch izol\u00e1torov. V\u010faka svojej n\u00edzkej hmotnosti a pevnostn\u00fdm vlastnostiam pri vysok\u00fdch teplot\u00e1ch predstavuje vynikaj\u00faci materi\u00e1l na nosn\u00e9 kon\u0161truk\u010dn\u00e9 r\u00e1my v t\u00fdchto peciach, navy\u0161e sa m\u00f4\u017ee pochv\u00e1li\u0165 vynikaj\u00facimi izola\u010dn\u00fdmi vlastnos\u0165ami a potenci\u00e1lom \u00faspory energie.<\/p>\n
Procesy spekania RSiC sa l\u00ed\u0161ia v z\u00e1vislosti od zvolenej met\u00f3dy tvarovania. Tento proces zvy\u010dajne zah\u0155\u0148a umiestnenie zmesi SiC pr\u00e1\u0161ku a spojovacieho materi\u00e1lu do formy, potom karbotermick\u00fa redukciu na vytvorenie spekan\u00e9ho telesa. Reak\u010dn\u00fdm sp\u00e1jan\u00edm vznikaj\u00fa hust\u00e9 produkty, zatia\u013e \u010do rekry\u0161taliza\u010dn\u00fdm spekan\u00edm vznikaj\u00fa por\u00e9zne produkty vhodn\u00e9 pre vysok\u00e9 teploty.<\/p>\n
Karbid krem\u00edka je v priemysle \u010doraz ob\u013e\u00fabenej\u0161\u00edm materi\u00e1lom v\u010faka svojim vynikaj\u00facim mechanick\u00fdm a elektrick\u00fdm vlastnostiam, \u010do z neho rob\u00ed vynikaj\u00facu vo\u013ebu pre vysokoteplotn\u00e9 pece a keramick\u00e9 aplik\u00e1cie. V\u010faka n\u00edzkej tepelnej roz\u0165a\u017enosti je rekry\u0161talizovan\u00fd karbid krem\u00edka vhodn\u00fd aj na pou\u017eitie pri tak\u00fdchto extr\u00e9mnych teplot\u00e1ch, ako aj na kon\u0161truk\u010dn\u00e9 komponenty, napr\u00edklad n\u00e1bytok a valce vo vysokoteplotn\u00fdch peciach.<\/p>\n
Tepeln\u00e1 roz\u0165a\u017enos\u0165 RSiC z\u00e1vis\u00ed od jeho mikro\u0161trukt\u00fary, procesu spekania a teploty; svoju \u00falohu zohr\u00e1va aj teplota a typ \u010dinidla. Z\u00e1sadn\u00fa \u00falohu pri formovan\u00ed jeho mikro\u0161trukt\u00fary zohr\u00e1vaj\u00fa aj met\u00f3dy tv\u00e1rnenia - tie ur\u010duj\u00fa sp\u00f4sob vz\u00e1jomn\u00e9ho prepojenia z\u0155n materi\u00e1lu, ako aj jeho odolnos\u0165 vo\u010di tepeln\u00fdm \u0161okom.<\/p>\n
Jedn\u00fdm z najlep\u0161\u00edch sp\u00f4sobov hodnotenia tepelnej roz\u0165a\u017enosti RSiC je stereoskopick\u00fd mikroskop, ktor\u00e9ho v\u00fdsledky sa pou\u017e\u00edvaj\u00fa na v\u00fdpo\u010det objemovej roz\u0165a\u017enosti na z\u00e1klade konkr\u00e9tnych podmienok pomocou vzorcov, ako napr\u00edklad \"av = Cv3BV\", kde Cv je kon\u0161tantn\u00fd objemov\u00fd mern\u00fd obsah tepla, Gruneisov parameter je \"g\" a Vm predstavuje objemov\u00fd modul.<\/p>\n
RSiC sa vyzna\u010duje neobvyklou mikro\u0161trukt\u00farou pozost\u00e1vaj\u00facou z kolm\u00fdch dosiek vz\u00e1jomne spojen\u00fdch pre maxim\u00e1lnu mechanick\u00fa pevnos\u0165, h\u00fa\u017eevnatos\u0165 a odolnos\u0165 proti kor\u00f3zii. Okrem toho jeho n\u00edzky koeficient tepelnej roz\u0165a\u017enosti a vynikaj\u00faca odolnos\u0165 vo\u010di tepeln\u00fdm \u0161okom robia z RSiC atrakt\u00edvny materi\u00e1l v prostred\u00ed s vysok\u00fdmi teplotami.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide is an increasingly popular material due to its great mechanical, thermal and electrical properties. Recrystallized silicon carbide has unique properties due to its microstructure. RSiC is often utilized in kiln furniture and ceramic products such as refractories, wear-resistant industries and industrial high temperature kilns due to its excellent corrosion resistance and temperature resistance […]<\/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":[64],"tags":[],"class_list":["post-80","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/80","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/comments?post=80"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/80\/revisions"}],"predecessor-version":[{"id":81,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/80\/revisions\/81"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/media?parent=80"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/categories?post=80"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/tags?post=80"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}