Karbid krem\u00edka je jedn\u00fdm z najtvrd\u0161\u00edch be\u017en\u00fdch br\u00fasnych materi\u00e1lov, na Mohsovej stupnici tvrdosti m\u00e1 hodnotu 9,1. M\u00f4\u017ee sa pou\u017e\u00edva\u0165 na umeleck\u00e9 a remeseln\u00e9 \u00fa\u010dely, ako je br\u00fasenie dreva, kovu a keramick\u00fdch povrchov.<\/p>\n
Okrem toho, \u017ee je zn\u00e1my svojou odolnos\u0165ou proti opotrebovaniu v s\u00fa\u010diastkach plynov\u00fdch turb\u00edn a raketov\u00fdch d\u00fdz, plast s elektroiskrov\u00fdm obr\u00e1ban\u00edm sa m\u00f4\u017ee pou\u017e\u00edva\u0165 aj na v\u00fdrobu presn\u00fdch s\u00fa\u010diastok so zlo\u017eitou geometriou.<\/p>\n
Karbid krem\u00edka je jedn\u00fdm z najtvrd\u0161\u00edch materi\u00e1lov, ak\u00e9 boli kedy vytvoren\u00e9, a vyzna\u010duje sa mimoriadnou odolnos\u0165ou proti opotrebovaniu, tak\u017ee je ide\u00e1lny pre aplik\u00e1cie, ktor\u00e9 vy\u017eaduj\u00fa vysok\u00fa odolnos\u0165 proti opotrebovaniu. Okrem toho je v\u010faka svojej tepelnej odolnosti a inertn\u00fdm vlastnostiam vhodn\u00fd do prostred\u00ed citliv\u00fdch na teplo, ako je napr\u00edklad tryskanie.<\/p>\n
Ostr\u00e9 a tvrd\u00e9 br\u00fasne zrn\u00e1 karbidu krem\u00edka z neho robia fantastick\u00fa vo\u013ebu pre keramiku, sklo, kame\u0148, mramor, sklolamin\u00e1t a in\u00e9 nekovov\u00e9 materi\u00e1ly, ako s\u00fa keramick\u00e9 dla\u017edice. Okrem toho ve\u013emi \u00fa\u010dinne funguje v procesoch tryskania, preto\u017ee jeho ostr\u00e9 abraz\u00edvne zrn\u00e1 leptaj\u00fa a pripravuj\u00fa podklad efekt\u00edvnej\u0161ie ako oxid hlinit\u00fd.<\/p>\n
Karbid krem\u00edka je tvrd\u00fd a odoln\u00fd, ale nie tak tvrd\u00fd ako diamant. Jeho tvrdos\u0165 pod\u013ea Brinella je pribli\u017ene 2400, zatia\u013e \u010do tvrdos\u0165 diamantu je viac ako 8100. Karbid krem\u00edka je v\u010faka svojim vysok\u00fdm teplot\u00e1m a odolnosti vhodn\u00fd na vykurovacie prvky v priemyseln\u00fdch peciach, ako aj na komponenty v \u010derpadl\u00e1ch, raketov\u00fdch motoroch a automobiloch; jeho odolnos\u0165 vo\u010di kor\u00f3zii znamen\u00e1, \u017ee spo\u013eahlivo funguje aj v kyslom a z\u00e1saditom prostred\u00ed po\u010das dlh\u0161ieho obdobia.<\/p>\n
Br\u00fasne materi\u00e1ly z karbidu krem\u00edka maj\u00fa ostrej\u0161ie a tvrd\u0161ie zrn\u00e1 ako br\u00fasne materi\u00e1ly z oxidu hlin\u00edka, v\u010faka \u010domu s\u00fa vhodn\u00e9 na rezanie skla, plastov, drevovl\u00e1knit\u00fdch dosiek strednej hustoty, kovov a dreva s mal\u00fdm tlakom. Okrem toho karbid krem\u00edka dobre funguje aj pri br\u00fasen\u00ed kovov a dreva - av\u0161ak vzh\u013eadom na to, \u017ee nem\u00e1 tak\u00e9 pru\u017en\u00e9 vlastnosti, po dlh\u0161\u00edch cykloch br\u00fasenia sa r\u00fdchlej\u0161ie opotrebuje.<\/p>\n
syntetick\u00fd materi\u00e1l s tvrdos\u0165ou pod\u013ea Mohsa 9, ktor\u00fa prekon\u00e1va len diamant, kubick\u00fd nitrid b\u00f3ru a karbid b\u00f3ru. Je \u013eahk\u00fd a z\u00e1rove\u0148 m\u00e1 vynikaj\u00face vlastnosti tepelnej vodivosti.<\/p>\n
Oxid hlinit\u00fd sa dod\u00e1va v ru\u017eovej, bielej a hnedej farbe a je skvel\u00fd na tryskanie r\u00f4znych materi\u00e1lov. Zatia\u013e \u010do keramick\u00fd alebo zirk\u00f3nov\u00fd oxid hlinit\u00fd m\u00f4\u017ee lep\u0161ie fungova\u0165 na povrchoch z nehrdzavej\u00facej ocele, oxid hlinit\u00fd vynik\u00e1 pri tryskan\u00ed m\u00e4k\u0161\u00edch oce\u013eov\u00fdch zliatin, ktor\u00e9 je cenovo v\u00fdhodnej\u0161ie a z\u00e1rove\u0148 poskytuje dlh\u0161ie pou\u017eitie ako in\u00e9 abraz\u00edva - ide\u00e1lne na pr\u00edpravu povrchov pred aplik\u00e1ciou n\u00e1terov!<\/p>\n
Br\u00fasny materi\u00e1l z karbidu krem\u00edka sa m\u00f4\u017ee pochv\u00e1li\u0165 tvrdos\u0165ou 9-9,5 pod\u013ea Mohsovej stupnice a m\u00e1 zrn\u00e1 ostr\u00e9 ako britva, ktor\u00e9 bez n\u00e1mahy prere\u017e\u00fa tvrd\u00e9 materi\u00e1ly, ako je sklo, kame\u0148 a keramika. Tento materi\u00e1l v\u0161ak, \u017eia\u013e, nedok\u00e1\u017ee tak \u00fa\u010dinne reza\u0165 kovy alebo tvrd\u00e9 drevo.<\/p>\n
Br\u00fasne materi\u00e1ly z karbidu krem\u00edka s\u00fa tie\u017e menej odoln\u00e9 ako ich n\u00e1protivky z oxidu hlinit\u00e9ho, postupne sa opotreb\u00favaj\u00fa pou\u017e\u00edvan\u00edm a nakoniec sa rozpadn\u00fa na mal\u00e9 k\u00fasky podobn\u00e9 \u017eiletk\u00e1m, ktor\u00e9 sa daj\u00fa znovu pou\u017ei\u0165. Okrem toho sa jeho \u00fazky tvar pou\u017e\u00edvan\u00edm postupne opotreb\u00fava. Napokon, ich nedostato\u010dn\u00e1 \u0165a\u017enos\u0165 s\u0165a\u017euje br\u00fasenie tvrd\u00fdch materi\u00e1lov, ako aj ich rozbitie na ostr\u00e9 k\u00fasky na op\u00e4tovn\u00e9 pou\u017eitie.<\/p>\n
Karbid krem\u00edka a karbid b\u00f3ru sa \u0161iroko vyu\u017e\u00edvaj\u00fa v priemysle v\u010faka svojej extr\u00e9mnej tvrdosti. Tepeln\u00e9 vlastnosti B4C mu umo\u017e\u0148uj\u00fa odol\u00e1va\u0165 vysok\u00fdm teplot\u00e1m bez degrad\u00e1cie, zatia\u013e \u010do polovodivos\u0165 SiC a jeho schopnos\u0165 absorbova\u0165 neutr\u00f3ny ho robia u\u017eito\u010dn\u00fdm v elektronick\u00fdch zariadeniach a aplik\u00e1ci\u00e1ch jadrovej techniky. Na druhej strane karbid krem\u00edka sa vo v\u00e4\u010d\u0161ej miere vyu\u017e\u00edva ako abraz\u00edvny materi\u00e1l; v\u010faka ni\u017e\u0161\u00edm n\u00e1kladom a vynikaj\u00facej tvrdosti pon\u00faka v\u00e4\u010d\u0161iu cenov\u00fa dostupnos\u0165 v porovnan\u00ed s karbidom volfr\u00e1mu, ktor\u00fd sa pou\u017e\u00edva na pokro\u010dilej\u0161ie pou\u017eitie, napr\u00edklad na obr\u00e1banie, ktor\u00e9 sa nach\u00e1dza v r\u00e1mci leteck\u00e9ho priemyslu alebo v lek\u00e1rskych aplik\u00e1ci\u00e1ch, ako jeho pokro\u010dilej\u0161\u00ed n\u00e1protivok.<\/p>\n
Karbid krem\u00edka sa od oxidu hlinit\u00e9ho l\u00ed\u0161i t\u00fdm, \u017ee sa vyzna\u010duje \u00fazkymi a ostr\u00fdmi abraz\u00edvnymi zrnami, ktor\u00e9 sa pri intenz\u00edvnom tryskan\u00ed r\u00fdchlo opotreb\u00favaj\u00fa, tak\u017ee je n\u00e1kladovo efekt\u00edvnej\u0161\u00ed na tryskanie m\u00e4kk\u00fdch materi\u00e1lov, ako s\u00fa sklo, plasty a drevovl\u00e1knit\u00e9 dosky strednej hustoty. Okrem toho karbid krem\u00edka dobre lept\u00e1 a je vynikaj\u00facou vo\u013ebou pre presn\u00e9 \u00falohy.<\/p>\n
V\u010faka tvrdosti, tepelnej vodivosti a elektrickej vodivosti je keramika vynikaj\u00facou vo\u013ebou materi\u00e1lu na pou\u017eitie v \u017eiaruvzdorn\u00fdch materi\u00e1loch, keramike a v aplik\u00e1ci\u00e1ch v\u00fdkonovej elektroniky. Keramika je tie\u017e dobre zn\u00e1ma svojou chemickou odolnos\u0165ou a schopnos\u0165ou absorbova\u0165 neutr\u00f3ny, \u010do umo\u017e\u0148uje jej pou\u017eitie v n\u00e1ro\u010dn\u00fdch chemick\u00fdch prostrediach alebo v jadrov\u00fdch aplik\u00e1ci\u00e1ch.<\/p>\n
Najlep\u0161ie tieto dve br\u00fasiv\u00e1 rozl\u00ed\u0161ite tak, \u017ee ich povar\u00edte v koncentrovanom roztoku NaOH; ak sa br\u00fasivo rozpust\u00ed, ide o oxid hlinit\u00fd; v opa\u010dnom pr\u00edpade by mohlo \u00eds\u0165 o karbid krem\u00edka. Vykonanie tohto jednoduch\u00e9ho testu v\u00e1m umo\u017en\u00ed r\u00fdchlo ur\u010di\u0165, ktor\u00fd materi\u00e1l najlep\u0161ie vyhovuje va\u0161ej \u00falohe bez toho, aby ste sa museli ob\u00e1va\u0165 pr\u00edli\u0161 r\u00fdchleho opotrebovania. Pochopen\u00edm ich rozdielov a podobnost\u00ed pri pou\u017e\u00edvan\u00ed na pracovisku sa podstatne zv\u00fd\u0161i efektivita, bezpe\u010dnos\u0165 a \u017eivotnos\u0165.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide is one of the hardest common abrasive materials, rated 9.1 on Mohs hardness scale. It can be used for artistic and craft applications like sanding wood, metal, and ceramic surfaces. As well as being known for its wear-resistance qualities in gas turbine and rocket nozzle parts, EDMed plastic can also be used to […]<\/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-160","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/160","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=160"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/160\/revisions"}],"predecessor-version":[{"id":161,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/posts\/160\/revisions\/161"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/media?parent=160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/categories?post=160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/sk\/wp-json\/wp\/v2\/tags?post=160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}