Keramika z karbidu krem\u00edka je jedn\u00fdm z najtvrd\u0161\u00edch a najpevnej\u0161\u00edch dostupn\u00fdch technick\u00fdch materi\u00e1lov, ktor\u00fd nach\u00e1dza \u0161irok\u00e9 uplatnenie v automobilovom, stroj\u00e1rskom a chemickom priemysle.<\/p>\n
Spolo\u010dnos\u0165 Saint-Gobain Performance Ceramics & Refractories pon\u00faka \u0161irok\u00fd v\u00fdber spekan\u00fdch karbidov krem\u00edka s reak\u010dnou v\u00e4zbou, s kovovou matricou a s mullitovou v\u00e4zbou s v\u00fdnimo\u010dn\u00fdmi chemick\u00fdmi a mechanick\u00fdmi vlastnos\u0165ami pri teplot\u00e1ch do 1600 \u00b0C pre kone\u010dn\u00e9 pou\u017eitie. Tieto plne zhutnen\u00e9 v\u00fdrobky sa m\u00f4\u017eu pochv\u00e1li\u0165 vynikaj\u00facimi chemick\u00fdmi a mechanick\u00fdmi vlastnos\u0165ami pri teplot\u00e1ch kone\u010dn\u00e9ho pou\u017eitia u\u017e od 150 stup\u0148ov Celzia.<\/p>\n
Keramika z karbidu krem\u00edka je jedn\u00fdm z naj\u013eah\u0161\u00edch, najtvrd\u0161\u00edch a najpevnej\u0161\u00edch modern\u00fdch technick\u00fdch materi\u00e1lov. Je toxikologicky bezpe\u010dn\u00fd, odoln\u00fd vo\u010di oteru a m\u00e1 vynikaj\u00face mechanick\u00e9 vlastnosti v porovnan\u00ed s kovmi, napr\u00edklad vysok\u00fd Youngov modul a n\u00edzky koeficient tepelnej roz\u0165a\u017enosti.<\/p>\n
SiC je ide\u00e1lny materi\u00e1l, ktor\u00fd sp\u013a\u0148a pr\u00edsne po\u017eiadavky r\u00f4znych priemyseln\u00fdch odvetv\u00ed a poskytuje tvrdos\u0165 a modul pru\u017enosti potrebn\u00e9 pre pancierov\u00fa balistiku pri zlomku hmotnosti in\u00fdch materi\u00e1lov. \u010cierno\u0161ed\u00fd SiC pon\u00faka obe vlastnosti s\u00fa\u010dasne, aby splnil t\u00fato v\u00fdzvu.<\/p>\n
SSiC je vynikaj\u00faci materi\u00e1l na v\u00fdrobu komponentov odoln\u00fdch vo\u010di kor\u00f3zii a oderu, ako s\u00fa napr\u00edklad tesnenia \u010derpadiel a mechanick\u00e9 tesnenia, trysky na otrysk\u00e1vanie a cykl\u00f3ny. Okrem toho sa tento tuh\u00fd materi\u00e1l s n\u00edzkym koeficientom roz\u0165a\u017enosti osved\u010dil ako optick\u00e9 zrkadl\u00e1 v teleskopoch v\u010faka svojej odolnosti vo\u010di chemik\u00e1li\u00e1m, opotrebovaniu, oxid\u00e1cii a pevnosti pri vysok\u00fdch teplot\u00e1ch.<\/p>\n
Karbid krem\u00edka je jedn\u00fdm z naj\u013eah\u0161\u00edch a najtvrd\u0161\u00edch keramick\u00fdch materi\u00e1lov. Je odoln\u00fd vo\u010di kor\u00f3zii a kyselin\u00e1m a l\u00fahom. Okrem toho m\u00e1 vynikaj\u00facu tepeln\u00fa vodivos\u0165 s n\u00edzkou tepelnou roz\u0165a\u017enos\u0165ou; v\u010faka tomu je vhodn\u00fd do vysok\u00fdch tepl\u00f4t, ako aj do drsn\u00e9ho prostredia. V\u010faka svojim pevnostn\u00fdm vlastnostiam je vynikaj\u00facou vo\u013ebou materi\u00e1lu pre d\u00fdzy, lo\u017eisk\u00e1, nepriestreln\u00e9 dosky a podobn\u00e9 aplik\u00e1cie.<\/p>\n
Odolnos\u0165 SiC proti kor\u00f3zii vypl\u00fdva z jeho tenkej ochrannej vrstvy, ktor\u00e1 sa vytv\u00e1ra na jeho povrchu a vytv\u00e1ra oxidov\u00fa bari\u00e9ru, ktor\u00e1 br\u00e1ni priamej interakcii substr\u00e1tu s \u00fato\u010diacimi druhmi, \u010do vedie k parabolickej kinetike kor\u00f3zie. Obnovenie tejto oxidovej bari\u00e9ry z\u00e1vis\u00ed od faktorov, ako s\u00fa chemick\u00e9 druhy pr\u00edtomn\u00e9 v \u00fato\u010dnom prostred\u00ed, ako aj ne\u010distoty, pomocn\u00e9 l\u00e1tky pri spekan\u00ed a f\u00e1zy na hranici zrna pr\u00edtomn\u00e9 v materi\u00e1li substr\u00e1tu.<\/p>\n
Penov\u00e1 keramika sa vyzna\u010duje rovnomern\u00fdm rozlo\u017een\u00edm p\u00f3rov, vysokou p\u00f3rovitos\u0165ou a \u0161pecifick\u00fdm povrchom, selekt\u00edvnou priepustnos\u0165ou pre kvapaln\u00e9 a plynn\u00e9 m\u00e9di\u00e1, vynikaj\u00facimi chemick\u00fdmi, elektrick\u00fdmi, magnetick\u00fdmi a optick\u00fdmi funkciami, ako aj vynikaj\u00facimi chemick\u00fdmi, fyzik\u00e1lnymi, magnetick\u00fdmi a optick\u00fdmi funkciami - vlastnos\u0165ami, ktor\u00e9 z nej robia ide\u00e1lnu vo\u013ebu materi\u00e1lu pre v\u00fdrobky pracuj\u00face pri vysok\u00fdch teplot\u00e1ch, vysokom tlaku alebo v extr\u00e9mnych prostrediach.<\/p>\n
Keramika z penov\u00e9ho karbidu krem\u00edka sa vyzna\u010duje vynikaj\u00facou odolnos\u0165ou proti oxid\u00e1cii, v\u010faka \u010domu je vhodn\u00e1 na pou\u017eitie v stavebn\u00edctve a v oblasti polovodi\u010dov na kon\u0161trukciu v\u00fdmenn\u00edkov tepla v\u0161etk\u00fdch druhov. Ich \u0161peci\u00e1lna priestorov\u00e1 sie\u0165ov\u00e1 \u0161trukt\u00fara zlep\u0161uje tepeln\u00fa vodivos\u0165 pre lep\u0161\u00ed prenos tepla.<\/p>\n
Kombin\u00e1cia mechanick\u00fdch vlastnost\u00ed a chemickej odolnosti karbidu krem\u00edka z neho rob\u00ed vyh\u013ead\u00e1van\u00fd technick\u00fd materi\u00e1l. Odol\u00e1va kor\u00f3zii, oderu, er\u00f3zii, zatia\u013e \u010do jeho vysok\u00fd modul pru\u017enosti zabezpe\u010duje rozmerov\u00fa stabilitu. Karbid krem\u00edka vynik\u00e1 aj ako adh\u00e9zny materi\u00e1l v \u010derpadl\u00e1ch, mechanick\u00fdch tesneniach a lo\u017eisk\u00e1ch, pri\u010dom z h\u013eadiska tribologick\u00fdch vlastnost\u00ed mu sekunduje diamant a kubick\u00fd nitrid b\u00f3ru.<\/p>\n
Keramika z karbidu krem\u00edka je tvrd\u00fd a teplotne odoln\u00fd materi\u00e1l, ktor\u00fd je ide\u00e1lnou vo\u013ebou pre priemyseln\u00e9 aplik\u00e1cie. Ich pevnos\u0165 zost\u00e1va kon\u0161tantn\u00e1 aj pri extr\u00e9mne vysok\u00fdch teplot\u00e1ch, preto\u017ee odol\u00e1vaj\u00fa n\u00e1ro\u010dn\u00fdm podmienkam so zn\u00ed\u017een\u00fdm koeficientom trenia, odolnos\u0165ou proti kor\u00f3zii kyselinami a z\u00e1sadami a vynikaj\u00facou chemickou odolnos\u0165ou.<\/p>\n
Vlastnosti opotrebovania keramiky z karbidu krem\u00edka s\u00fa podmienen\u00e9 viacer\u00fdmi faktormi vr\u00e1tane po\u010diato\u010dnej drsnosti povrchu a chemick\u00fdch a mechanick\u00fdch vlastnost\u00ed jej materi\u00e1lu. Po\u010diato\u010dn\u00e1 drsnos\u0165 povrchu ovplyv\u0148uje tribologicky transformovan\u00e9 vytvoren\u00e9 vrstvy \u0161trukt\u00fary, ktor\u00e9 zni\u017euj\u00fa energiu potrebn\u00fa na aktiv\u00e1ciu opotrebenia a z\u00e1rove\u0148 zni\u017euj\u00fa tvorbu \u00falomkov opotrebenia.<\/p>\n
Penov\u00e1 keramika m\u00e1 prirodzene rovnomern\u00fa trojrozmern\u00fa sie\u0165ov\u00fa \u0161trukt\u00faru a vyzna\u010duje sa ve\u013ek\u00fdm \u0161pecifick\u00fdm povrchom, selekt\u00edvnou priepustnos\u0165ou pre kvapaln\u00e9 a plynn\u00e9 m\u00e9di\u00e1, vynikaj\u00facimi tepeln\u00fdmi, elektrick\u00fdmi, magnetick\u00fdmi a optick\u00fdmi funkciami a vlastnos\u0165ami tepelnej regul\u00e1cie. Preto nach\u00e1dzaj\u00fa \u0161irok\u00e9 uplatnenie v najr\u00f4znej\u0161\u00edch oblastiach, ako je metalurgia, stroj\u00e1rstvo, dopravn\u00e9 stroje, n\u00e1rodn\u00e1 obrana a ochrana \u017eivotn\u00e9ho prostredia.<\/p>\n
Pokro\u010dil\u00e1 keramika m\u00e1 jedine\u010dn\u00e9 at\u00f3mov\u00e9 zlo\u017eenie, ktor\u00e9 jej umo\u017e\u0148uje zosta\u0165 stabiln\u00e1 pri vysok\u00fdch teplot\u00e1ch, zatia\u013e \u010do in\u00e9 materi\u00e1ly sa pri zvy\u0161uj\u00facich sa teplot\u00e1ch rozp\u00ednaj\u00fa, ako napr\u00edklad nehrdzavej\u00faca oce\u013e. Karbid krem\u00edka m\u00e1 menej ako polovi\u010dn\u00fd koeficient tepelnej roz\u0165a\u017enosti ako nehrdzavej\u00faca oce\u013e.<\/p>\n
Ako tak\u00fd je ide\u00e1lnym materi\u00e1lom pre plynov\u00e9 tesniace kr\u00fa\u017eky, mechanick\u00e9 tesnenia, lo\u017eiskov\u00e9 diely v petrochemick\u00fdch a leteck\u00fdch aplik\u00e1ci\u00e1ch, preto\u017ee poskytuje odolnos\u0165 proti kor\u00f3zii, oxid\u00e1cii, chemick\u00e9mu opotrebovaniu a tepeln\u00fdm \u0161okom.<\/p>\n
Spekan\u00fd karbid krem\u00edka (SSiC) sa vyzna\u010duje extr\u00e9mnou tvrdos\u0165ou a vysok\u00fdm modulom pru\u017enosti, v\u010faka \u010domu dok\u00e1\u017ee spo\u013eahlivo absorbova\u0165 energiu n\u00e1razu a pon\u00faka balistick\u00fa ochranu pri zna\u010dnej \u00faspore hmotnosti v porovnan\u00ed s kovov\u00fdmi komponentmi.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide ceramic is one of the hardest and strongest engineering materials available, finding widespread application across automotive, mechanical and […]<\/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-78","post","type-post","status-publish","format-standard","hentry","category-product-related"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/78","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/comments?post=78"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/78\/revisions"}],"predecessor-version":[{"id":79,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/78\/revisions\/79"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/media?parent=78"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/categories?post=78"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/tags?post=78"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}