Rekry\u0161talizovan\u00fd karbid krem\u00edka (RSiC) pon\u00faka v\u00fdnimo\u010dn\u00fa pevnos\u0165 pri vysok\u00fdch teplot\u00e1ch a odolnos\u0165 proti oderu, v\u010faka \u010domu je vhodn\u00fdm materi\u00e1lom pre cel\u00fd rad aplik\u00e1ci\u00ed. V\u010faka svojej jedine\u010dnej mikro\u0161trukt\u00fare rekry\u0161talizovan\u00fd SiC prekon\u00e1va reak\u010dne spekan\u00fd alebo beztlakovo spekan\u00fd SiC z h\u013eadiska tepeln\u00fdch, mechanick\u00fdch a chemick\u00fdch vlastnost\u00ed.<\/p>\n
RSiC sa vyr\u00e1ba odlievan\u00edm, vytl\u00e1\u010dan\u00edm alebo vstrekovan\u00edm a potom sa na pou\u017eitie zahrieva na vysok\u00e9 teploty.<\/p>\n
Karbid krem\u00edka je mimoriadne tvrd\u00e1 a odoln\u00e1 keramika s vynikaj\u00facimi mechanick\u00fdmi vlastnos\u0165ami a vysokou odolnos\u0165ou proti kor\u00f3zii, v\u010faka \u010domu je \u0161iroko pou\u017eite\u013en\u00e1 v leteckom a vojenskom priemysle a v in\u00fdch oblastiach na zv\u00fd\u0161enie v\u00fdkonu zariaden\u00ed a zlep\u0161enie ich pou\u017e\u00edvania.<\/p>\n
Rekry\u0161talizovan\u00fd karbid krem\u00edka (RSiC) na rozdiel od v\u00e4\u010d\u0161iny keramiky SiC vykazuje po\u010das spekania minim\u00e1lne zmr\u0161tenie a mo\u017eno ho formova\u0165 do mnoh\u00fdch geometrick\u00fdch tvarov. Okrem toho jeho pevnos\u0165 zost\u00e1va prakticky kon\u0161tantn\u00e1 aj pri ve\u013emi vysok\u00fdch teplot\u00e1ch, pri\u010dom odol\u00e1va obrovsk\u00e9mu za\u0165a\u017eeniu.<\/p>\n
RSiC mo\u017eno vyrobi\u0165 r\u00f4znymi v\u00fdrobn\u00fdmi technikami vr\u00e1tane odlievania, vytl\u00e1\u010dania a vstrekovania. Je ide\u00e1lny na r\u00f4zne aplik\u00e1cie v oblasti n\u00e1bytku do pec\u00ed, od jednoduch\u00fdch ty\u010d\u00ed a\u017e po zlo\u017eit\u00e9 kon\u0161truk\u010dn\u00e9 diely, a to v\u010faka svojej vynikaj\u00facej tepelnej vodivosti a odolnosti vo\u010di oxida\u010dnej kor\u00f3zii tepeln\u00fdm \u0161okom a pevnosti za tepla - dokonca prekon\u00e1va nitridov\u00e9 \u017eiaruvzdorn\u00e9 materi\u00e1ly SiC viazan\u00e9 oxidmi!<\/p>\n
Rekry\u0161talizovan\u00fd karbid krem\u00edka je inertn\u00e1 p\u00f3rovit\u00e1 spekan\u00e1 keramika s vynikaj\u00facimi komplexn\u00fdmi vlastnos\u0165ami, ktor\u00e1 na\u0161la uplatnenie vo viacer\u00fdch oblastiach, napr\u00edklad v n\u00e1bytku pec\u00ed, m\u00e9di\u00e1ch plynov\u00fdch hor\u00e1kov a filtroch pevn\u00fdch \u010dast\u00edc. V\u010faka svojej vynikaj\u00facej vysokoteplotnej tuhosti a vlastnostiam odolnosti vo\u010di kor\u00f3zii predstavuje rekry\u0161talizovan\u00fd karbid krem\u00edka vynikaj\u00faci kon\u0161truk\u010dn\u00fd materi\u00e1l vhodn\u00fd do prostredia s vysokou teplotou.<\/p>\n
Odolnos\u0165 proti kor\u00f3zii z\u00e1vis\u00ed od viacer\u00fdch faktorov vr\u00e1tane chemick\u00e9ho prostredia \u00fatoku a reak\u010dn\u00fdch sekvenci\u00ed v r\u00e1mci oxidovej vrstvy materi\u00e1lu. Mechanick\u00e9 nam\u00e1hanie m\u00f4\u017ee t\u00fato stabilitu oxidovej vrstvy zmeni\u0165. Mal\u00e9 mno\u017estv\u00e1 ytria, hafnia a kovov vz\u00e1cnych zem\u00edn m\u00f4\u017eu zlep\u0161i\u0165 odolnos\u0165 vo\u010di cyklickej oxid\u00e1cii, odolnos\u0165 vo\u010di er\u00f3zii a kor\u00f3zii a odolnos\u0165 vo\u010di odletuj\u00facim oxidom.<\/p>\n
Rekry\u0161talizovan\u00fd karbid krem\u00edka pon\u00faka nielen vysok\u00fa pevnos\u0165, ale aj ve\u013emi n\u00edzke zmr\u0161tenie. V\u010faka tomu je mo\u017en\u00e9 vyr\u00e1ba\u0165 ve\u013ek\u00e9 diely s presn\u00fdmi rozmermi bez probl\u00e9mov s vn\u00fatorn\u00fdm nap\u00e4t\u00edm alebo povrchovou kor\u00f3ziou. Prilo\u017een\u00edm nap\u00e4tia na jeho povrch sa z neho m\u00f4\u017ee sta\u0165 antikor\u00f3zna f\u00f3lia bez potreby \u0161peci\u00e1lnych zdrojov energie; namiesto toho f\u00f3lia generuje dostatok tepla na \u00fa\u010dinn\u00e9 zni\u010denie zdroja kor\u00f3zie.<\/p>\n
Spekan\u00fd karbid krem\u00edka sa od v\u00e4\u010d\u0161iny keramiky l\u00ed\u0161i vysokou tepelnou vodivos\u0165ou a n\u00edzkou hustotou, \u010do z neho rob\u00ed vynikaj\u00faci materi\u00e1l pre elektrick\u00e9 aplik\u00e1cie vr\u00e1tane chladiacich potrub\u00ed a ochrann\u00fdch bari\u00e9r. Okrem toho je v\u010faka svojej odolnosti vo\u010di vibr\u00e1ci\u00e1m a chemik\u00e1li\u00e1m vhodn\u00fd na vibr\u00e1cie motorov, ako aj na chemick\u00e9 zne\u010distenie.<\/p>\n
Chemicky odoln\u00e1 guma sa \u010dasto pou\u017e\u00edva pri v\u00fdrobe mechanick\u00fdch tesnen\u00ed a \u010derpadiel v\u010faka svojej mimoriadnej odolnosti proti opotrebovaniu, oderu a kor\u00f3zii. Okrem toho tento materi\u00e1l odol\u00e1va vysokor\u00fdchlostn\u00fdm projektilom, ako s\u00fa gu\u013eky a \u010drepiny vystre\u013eovan\u00e9 z vozidiel, a nach\u00e1dza sa aj v tesneniach dieselov\u00fdch motorov automobilov. Tento univerz\u00e1lny materi\u00e1l sa vyu\u017e\u00edva aj v trysk\u00e1ch a ventiloch v\u010faka jeho chemick\u00fdm vlastnostiam a odolnosti vo\u010di opotrebovaniu.<\/p>\n
RSiC sa od tradi\u010dn\u00fdch \u017eiaruvzdorn\u00fdch materi\u00e1lov odli\u0161uje nieko\u013ek\u00fdmi v\u00fdnimo\u010dn\u00fdmi vlastnos\u0165ami, ktor\u00e9 ho odli\u0161uj\u00fa, ako je vysok\u00e1 pevnos\u0165 nitridovej v\u00e4zby, n\u00edzka tepeln\u00e1 roz\u0165a\u017enos\u0165 a \u010dist\u00e9 rozhranie. Okrem toho je v\u00fdroba jednoduch\u00e1, preto\u017ee RSiC sa d\u00e1 \u013eahko formova\u0165 do r\u00f4znych tvarov.<\/p>\n
Vysok\u00e1 tepeln\u00e1 vodivos\u0165 karbidu krem\u00edka a jeho n\u00edzka tepeln\u00e1 roz\u0165a\u017enos\u0165 mu umo\u017e\u0148uj\u00fa odol\u00e1va\u0165 tepeln\u00fdm \u0161okom sp\u00f4soben\u00fdm polovodi\u010dov\u00fdmi elektronick\u00fdmi zariadeniami, \u010d\u00edm sa predl\u017euje jeho \u017eivotnos\u0165 a umo\u017e\u0148uje mu odol\u00e1va\u0165 vysok\u00fdm teplot\u00e1m a nap\u00e4tiam.<\/p>\n
Karbid krem\u00edka sa m\u00f4\u017ee pri p\u00f4soben\u00ed vody formova\u0165 do dvoch polymorfov: alfa (a-SiC) s wurtzitovou kry\u0161t\u00e1lovou \u0161trukt\u00farou a beta (b-SiC) s kry\u0161t\u00e1lmi zinku blende. Z t\u00fdchto dvoch foriem beta SiC pon\u00faka v\u00e4\u010d\u0161iu odolnos\u0165 vo\u010di kor\u00f3zii a oxida\u010dn\u00fdm \u00fatokom, tak\u017ee b-SiC je vhodnej\u0161\u00ed.<\/p>\n
Techniky odparovania a konglomer\u00e1cie m\u00f4\u017eu produkova\u0165 vysoko por\u00e9znu keramiku karbidu krem\u00edka s otvoren\u00fdmi p\u00f3rmi 11%-15% a ve\u013ekos\u0165ou z\u0155n medzi 100 pm a 500 pm, zn\u00e1mu ako RSIC. Tento materi\u00e1l sa m\u00f4\u017ee pochv\u00e1li\u0165 vynikaj\u00facou MOR pri izbovej teplote, ako aj odolnos\u0165ou vo\u010di teplotn\u00e9mu \u0161oku pri 300 stup\u0148och Celzia, n\u00edzkym zmr\u0161\u0165ovan\u00edm po\u010das spekania, ako aj t\u00fdm, \u017ee je pou\u017eite\u013en\u00fd v r\u00f4znych aplik\u00e1ci\u00e1ch vr\u00e1tane n\u00e1bytku do pec\u00ed - \u010do je obrovsk\u00e1 v\u00fdhoda oproti hust\u00fdm materi\u00e1lom z oxykarbidu krem\u00edka, ktor\u00e9 nemaj\u00fa odolnos\u0165 vo\u010di teplotn\u00fdm \u0161okom a schopnos\u0165 MOR.<\/p>\n
Rekry\u0161talizovan\u00fd karbid krem\u00edka vynik\u00e1 ako elektroizola\u010dn\u00fd materi\u00e1l s neprekonate\u013en\u00fdmi elektroizola\u010dn\u00fdmi vlastnos\u0165ami, ktor\u00fd odol\u00e1va vysok\u00fdm teplot\u00e1m bez toho, aby praskal pod tlakom a bol po\u0161koden\u00fd kor\u00f3ziou alebo kyslou kor\u00f3ziou - ide\u00e1lny do r\u00f4znych prostred\u00ed. Okrem toho jeho n\u00edzka tepeln\u00e1 roz\u0165a\u017enos\u0165 mu umo\u017e\u0148uje odol\u00e1va\u0165 zlomom sp\u00f4soben\u00fdm tepeln\u00fdm \u0161okom.<\/p>\n
Sodnov\u00e1penat\u00e9 sklo je ide\u00e1lnym materi\u00e1lom na pou\u017eitie vo vysokoteplotn\u00fdch peciach a zariadeniach, v sol\u00e1rnych elektr\u00e1r\u0148ach na premenu slne\u010dn\u00e9ho svetla na elektrinu a v \u010fal\u0161\u00edch aplik\u00e1ci\u00e1ch, ktor\u00e9 si vy\u017eaduj\u00fa vysok\u00e9 teploty.<\/p>\n
Odlievanie, vytl\u00e1\u010danie a vstrekovanie s\u00fa tri z\u00e1kladn\u00e9 sp\u00f4soby v\u00fdroby RSiC. Vstrekovanie sa v\u0161ak stalo uprednost\u0148ovanou met\u00f3dou v\u010faka svojej n\u00e1kladovej efekt\u00edvnosti a \u00fa\u010dinnosti; RSiC lisovan\u00fd vstrekovan\u00edm v\u0161ak b\u00fdva po vytvoren\u00ed slab\u00fd a p\u00f3rovit\u00fd, \u010do zhor\u0161uje jeho vlastnosti; preto bol vyvinut\u00fd cyklick\u00fd proces impregn\u00e1cie a pyrol\u00fdzy polym\u00e9rov (PIP) s n\u00e1slednou rekry\u0161taliz\u00e1ciou ako rie\u0161enie, ktor\u00e9 zvy\u0161uje pevnos\u0165 v ohybe a z\u00e1rove\u0148 zni\u017euje p\u00f3rovitos\u0165 komer\u010dn\u00fdch v\u00fdrobkov RSiC.<\/p>\n
Karbid krem\u00edka m\u00e1 v\u010faka svojej pevnosti, tvrdosti a odolnosti proti kor\u00f3zii mnoho aplik\u00e1ci\u00ed. \u010casto sa vyskytuje vo v\u00fdrobkoch, ako s\u00fa br\u00fasne kot\u00fa\u010de a rezn\u00e9 n\u00e1stroje pre ich vysok\u00fa pevnos\u0165 a tvrdos\u0165; vysokoteplotn\u00e9 kachle a chemick\u00e9 reaktory; ochrann\u00e9 zariadenia (pancier tanku a pancier na telo).<\/p>\n
RSiC mo\u017eno vytvori\u0165 nieko\u013ek\u00fdmi technikami vr\u00e1tane odlievania, vytl\u00e1\u010dania a vstrekovania. Po vytvoren\u00ed sa mus\u00ed spiec\u0165 pri vysok\u00fdch teplot\u00e1ch v peci, aby rekry\u0161talizoval a zbavil sa spojovacieho materi\u00e1lu - RSiC je tak elektrick\u00fd izolant s vynikaj\u00facou dielektrickou pevnos\u0165ou vhodn\u00fd na elektronick\u00e9 aplik\u00e1cie.<\/p>\n
Karborundum (\/karbrnm\/), zliatina zlo\u017een\u00e1 z hlin\u00edka a uhl\u00edka, ktor\u00e1 sa v pr\u00edrode vyskytuje ako drahokam moissanit, bola prv\u00fdkr\u00e1t s\u00e9riovo vyr\u00e1ban\u00e1 Edwardom Goodrichom Achesonom ako priemyseln\u00e1 forma karbidu krem\u00edka na pou\u017eitie v trec\u00edch brzd\u00e1ch a keramick\u00fdch dosk\u00e1ch nepriestreln\u00fdch viest. Karborundum sl\u00fa\u017ei aj ako abraz\u00edvum a tvor\u00ed z\u00e1klad kolografickej zrnitosti; po nanesen\u00ed priamo na hlin\u00edkov\u00fa dosku sa po jeho aplik\u00e1cii vytvoria stopy po tla\u010di atramentu.<\/p>","protected":false},"excerpt":{"rendered":"
Recrystallized silicon carbide (RSiC) offers exceptional high-temperature strength and abrasion resistance, making it the go-to material in a range of applications. Thanks to its unique microstructure, recrystallized SiC outshone both reaction sintered or pressureless sintered SiC in terms of thermal, mechanical and chemical properties. RSiC is produced through slip casting, extrusion or injection molding processes […]<\/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-78","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/78","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=78"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/78\/revisions"}],"predecessor-version":[{"id":79,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/78\/revisions\/79"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/media?parent=78"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/categories?post=78"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/tags?post=78"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}