![\"Rekrystalizovan\u00fd](\"http:\/\/siliconcarbideceramic.net\/wp-content\/uploads\/2024\/03\/Recrystallized-Silicon-Carbide.jpg\")
<\/p>","protected":false},"excerpt":{"rendered":"Karbid k\u0159em\u00edku je extr\u00e9mn\u011b tvrd\u00e1 keramika, kter\u00e1 m\u00e1 vynikaj\u00edc\u00ed teplotn\u00ed stabilitu a odolnost proti korozi, d\u00edky \u010demu\u017e se hojn\u011b vyu\u017e\u00edv\u00e1 v chemick\u00e9m, metalurgick\u00e9m a ot\u011bruvzdorn\u00e9m pr\u016fmyslu.<\/p>\n
RSiC se vyr\u00e1b\u00ed procesem odpa\u0159ov\u00e1n\u00ed a koagulace p\u0159i vysok\u00e9 teplot\u011b a vyzna\u010duje se otev\u0159enou p\u00f3rovitost\u00ed v rozmez\u00ed 11-15%, velkou velikost\u00ed zrn a \u017e\u00e1dn\u00fdm smr\u0161\u0165ov\u00e1n\u00edm b\u011bhem procesu vypalov\u00e1n\u00ed.<\/p>\n
Rekrystalizovan\u00fd karbid k\u0159em\u00edku se od mnoha por\u00e9zn\u00edch keramik li\u0161\u00ed t\u00edm, \u017ee se b\u011bhem v\u00fdpalu nesmr\u0161\u0165uje, co\u017e umo\u017e\u0148uje vyr\u00e1b\u011bt v\u011bt\u0161\u00ed d\u00edly s ni\u017e\u0161\u00edmi energetick\u00fdmi n\u00e1klady a v krat\u0161\u00edch v\u00fdrobn\u00edch cyklech. Krom\u011b toho tento materi\u00e1l odol\u00e1v\u00e1 tepeln\u00fdm \u0161ok\u016fm i vysok\u00fdm teplot\u00e1m, ani\u017e by do\u0161lo k po\u0161kozen\u00ed jeho struktury.<\/p>\n
Velikost p\u00f3r\u016f a mikrostruktura hraj\u00ed ned\u00edlnou roli p\u0159i ur\u010dov\u00e1n\u00ed elektrick\u00e9ho odporu por\u00e9zn\u00edho karbidu k\u0159em\u00edku. Zm\u011bnou teploty sp\u00e9k\u00e1n\u00ed a nastaven\u00ed tlaku CIP lze p\u0159izp\u016fsobit velikost p\u00f3r\u016f speci\u00e1ln\u011b pro ur\u010dit\u00e9 aplikace, zat\u00edmco \u00fapravy chemick\u00e9ho slo\u017een\u00ed umo\u017e\u0148uj\u00ed odpov\u00eddaj\u00edc\u00edm zp\u016fsobem zm\u011bnit jeho p\u00f3rovitost.<\/p>\n
Velikost p\u00f3r\u016f lze tak\u00e9 regulovat pomoc\u00ed p\u0159\u00edsad druh\u00e9 f\u00e1ze, jako jsou oxidy nebo silicidy. Manipulac\u00ed s faktory, kter\u00e9 ovliv\u0148uj\u00ed elektrick\u00fd odpor v por\u00e9zn\u00edm karbidu k\u0159em\u00edku, se mohou objevit nov\u00e9 a zaj\u00edmav\u00e9 aplikace v mnoha oblastech.<\/p>\n
Rekrystalizovan\u00e1 keramika z karbidu k\u0159em\u00edku se vyzna\u010duje pokro\u010dilou mikrostrukturou, kter\u00e1 j\u00ed d\u00e1v\u00e1 v\u00fdjime\u010dn\u00e9 mechanick\u00e9, tepeln\u00e9 a elektrick\u00e9 vlastnosti p\u0159i v\u0161ech teplot\u00e1ch, v\u010detn\u011b rozm\u011brov\u00e9 stability, odolnosti proti korozi a pevnosti i p\u0159i extr\u00e9mn\u00edch teplot\u00e1ch. D\u00edky t\u011bmto vlastnostem je keramika RSiC vynikaj\u00edc\u00ed volbou pro pou\u017eit\u00ed jako vybaven\u00ed pec\u00ed (nap\u0159. tunelov\u00fdch, raketopl\u00e1nov\u00fdch a dvouv\u00e1lcov\u00fdch pec\u00ed) nebo dokonce jako panc\u00e9\u0159ov\u00e9 desky proti \u00fatok\u016fm balistick\u00fdch st\u0159el.<\/p>\n
Karbid k\u0159em\u00edku (SiC) s k\u0159emi\u010ditanovou vazbou, vyroben\u00fd z hrubozrnn\u00e9ho a st\u0159edn\u011bzrnn\u00e9ho SiC pr\u00e1\u0161ku slinut\u00e9ho s hlinitok\u0159emi\u010ditanov\u00fdm pojivem 5-15%, m\u00e1 homogenn\u00ed strukturu a vynikaj\u00edc\u00ed pevnost v ohybu; nav\u00edc vykazuje vynikaj\u00edc\u00ed oxida\u010dn\u00ed odolnost. Ve srovn\u00e1n\u00ed s t\u00edm se RSiC vyzna\u010duje homogenn\u011bj\u0161\u00ed strukturou s vy\u0161\u0161\u00ed pevnost\u00ed v ohybu a tak\u00e9 zv\u00fd\u0161enou odolnost\u00ed proti oxidaci.<\/p>\n
RSiC se vyr\u00e1b\u00ed procesem odpa\u0159ov\u00e1n\u00ed a kondenzace, kter\u00fd vytv\u00e1\u0159\u00ed \u010dist\u0161\u00ed a hust\u0161\u00ed materi\u00e1l ne\u017e standardn\u00ed procesy sp\u00e9k\u00e1n\u00ed pr\u00e1\u0161ku, co\u017e znamen\u00e1, \u017ee k vypln\u011bn\u00ed jeho p\u00f3r\u016f je zapot\u0159eb\u00ed m\u00e9n\u011b kovov\u00e9ho k\u0159em\u00edku, \u010d\u00edm\u017e se sni\u017euje riziko vzniku trhlin b\u011bhem sp\u00e9k\u00e1n\u00ed a z\u00e1rove\u0148 je zaji\u0161t\u011bna p\u0159esn\u011bj\u0161\u00ed geometrie d\u00edl\u016f d\u00edky absenci smr\u0161\u0165ov\u00e1n\u00ed b\u011bhem infiltrace.<\/p>\n
Karbid k\u0159em\u00edku se vyzna\u010duje vynikaj\u00edc\u00ed chemickou stabilitou a odolnost\u00ed proti tepeln\u00fdm \u0161ok\u016fm s n\u00edzk\u00fdm koeficientem rozta\u017enosti. Odol\u00e1v\u00e1 teplot\u00e1m a\u017e do 2 200 \u00b0C. D\u00edky t\u00e9to vysok\u00e9 teplotn\u00ed stabilit\u011b je karbid k\u0159em\u00edku vynikaj\u00edc\u00ed volbou materi\u00e1lu pro energetick\u00e9 aplikace, jako jsou jadern\u00e9 reaktory nebo sol\u00e1rn\u00ed elektr\u00e1rny.<\/p>\n
Reak\u010dn\u00ed slinov\u00e1n\u00ed je jednou z nejpou\u017e\u00edvan\u011bj\u0161\u00edch metod v\u00fdroby keramiky, p\u0159i n\u00ed\u017e se sm\u00edch\u00e1n\u00edm atom\u016f k\u0159em\u00edku a uhl\u00edku do pr\u00e1\u0161kov\u00e9ho oxidu k\u0159emi\u010dit\u00e9ho vytvo\u0159\u00ed keramick\u00fd materi\u00e1l s diamantov\u011b tvrd\u00fdmi vlastnostmi a kompaktn\u00ed strukturou, z n\u011bho\u017e se vyr\u00e1b\u011bj\u00ed r\u016fzn\u011b tvarovan\u00e9 d\u00edly.<\/p>\n
Spole\u010dnosti CoorsTek, Saint-Gobain Ceramic Materials, ESK-SIC GmbH a Fiven pat\u0159\u00ed k l\u00eddr\u016fm na trhu v\u00fdroby rekrystalizovan\u00e9ho karbidu k\u0159em\u00edku, p\u0159i\u010dem\u017e ka\u017ed\u00e1 z nich m\u00e1 ve sv\u00e9m oboru dlouhou historii a je siln\u011b zam\u011b\u0159ena na inovace. P\u0159esto\u017ee p\u0159esn\u00e9 \u00fadaje o jejich prodej\u00edch nejsou ve\u0159ejn\u011b dostupn\u00e9, tyto firmy si udr\u017euj\u00ed v\u00fdznamn\u00e9 postaven\u00ed na trhu a maj\u00ed z\u0159ejm\u011b dobr\u00e9 p\u0159edpoklady pro dal\u0161\u00ed expanzi i v budoucnu.<\/p>\n
Karbid k\u0159em\u00edku se vyzna\u010duje vynikaj\u00edc\u00ed odolnost\u00ed proti korozi d\u00edky sv\u00e9 p\u0159irozen\u00e9 struktu\u0159e materi\u00e1lu, kterou tvo\u0159\u00ed vz\u00e1jemn\u011b se prol\u00ednaj\u00edc\u00ed deskovit\u00e1 zrna, je\u017e se pohybuj\u00ed kolmo pod\u00e9l jeho povrchu. Jeho jedine\u010dn\u00e1 mikrostruktura nav\u00edc nab\u00edz\u00ed nep\u0159ekonatelnou odolnost proti erozi\/od\u011bru\/tepeln\u00fdm \u0161ok\u016fm a rozm\u011brovou st\u00e1lost p\u0159i vy\u0161\u0161\u00edch teplot\u00e1ch; je tak ide\u00e1ln\u00edm materi\u00e1lem pro v\u00fdrobu n\u00e1bytku do pec\u00ed a dal\u0161\u00ed vysokoteplotn\u00ed aplikace v pr\u016fmyslu.<\/p>\n
Rekrystalizovan\u00fd karbid k\u0159em\u00edku lze tvarovat pomoc\u00ed kluzn\u00e9ho lit\u00ed, vytla\u010dov\u00e1n\u00ed a vst\u0159ikov\u00e1n\u00ed, \u010d\u00edm\u017e se z\u00edsk\u00e1 materi\u00e1l s vynikaj\u00edc\u00ed pevnost\u00ed p\u0159i velmi vysok\u00fdch teplot\u00e1ch. D\u00edky sv\u00e9 pevnosti je zvl\u00e1\u0161t\u011b vhodn\u00fd pro konstrukci r\u00e1m\u016f nosn\u00fdch konstrukc\u00ed v tunelov\u00fdch pec\u00edch, kyvadlov\u00fdch pec\u00edch a pec\u00edch s doln\u00edm v\u00fdpalem, proto\u017ee umo\u017e\u0148uje odol\u00e1vat velmi vysok\u00fdm teplot\u00e1m a z\u00e1rove\u0148 zlep\u0161uje oxida\u010dn\u00ed odolnost vyzd\u00edvky pece a sni\u017euje spot\u0159ebu energie.<\/p>\n
Rekrystalizovan\u00fd karbid k\u0159em\u00edku m\u00e1 tak\u00e9 velk\u00fd potenci\u00e1l pro v\u00fdrobu keramiky vyztu\u017een\u00e9 kovy, co\u017e p\u0159edstavuje \u00fa\u010dinn\u00fd zp\u016fsob kombinace kov\u016f a keramiky v pokro\u010dil\u00fdch technick\u00fdch komponentech pou\u017e\u00edvan\u00fdch pro sol\u00e1rn\u00ed v\u011b\u017ee.<\/p>\n
<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide is an extremely hard ceramic that possesses superior temperature stability and corrosion resistance, making it widely utilized across […]<\/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":"default","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":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","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-70","post","type-post","status-publish","format-standard","hentry","category-product-related"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/posts\/70","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/comments?post=70"}],"version-history":[{"count":3,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/posts\/70\/revisions"}],"predecessor-version":[{"id":165,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/posts\/70\/revisions\/165"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/media?parent=70"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/categories?post=70"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/tags?post=70"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}