Karbid k\u0159em\u00edku je jedn\u00edm z nejtvrd\u0161\u00edch b\u011b\u017en\u00fdch brusn\u00fdch materi\u00e1l\u016f, na Mohsov\u011b stupnici tvrdosti m\u00e1 hodnotu 9,1. Lze jej pou\u017e\u00edt pro um\u011bleck\u00e9 a \u0159emesln\u00e9 aplikace, jako je brou\u0161en\u00ed d\u0159eva, kovu a keramick\u00fdch povrch\u016f.<\/p>\n
Krom\u011b toho, \u017ee je plast zn\u00e1m\u00fd svou odolnost\u00ed proti opot\u0159eben\u00ed v d\u00edlech plynov\u00fdch turb\u00edn a raketov\u00fdch trysek, lze jej tak\u00e9 pou\u017e\u00edt k v\u00fdrob\u011b p\u0159esn\u00fdch sou\u010d\u00e1st\u00ed se slo\u017eitou geometri\u00ed.<\/p>\n
Karbid k\u0159em\u00edku je jedn\u00edm z nejtvrd\u0161\u00edch materi\u00e1l\u016f, kter\u00e9 kdy byly vytvo\u0159eny, a vyzna\u010duje se vynikaj\u00edc\u00ed odolnost\u00ed proti opot\u0159eben\u00ed, tak\u017ee je ide\u00e1ln\u00ed pro aplikace, kter\u00e9 vy\u017eaduj\u00ed vysokou odolnost proti opot\u0159eben\u00ed. Krom\u011b toho je d\u00edky sv\u00e9 tepeln\u00e9 odolnosti a inertn\u00edm vlastnostem vhodn\u00fd pro prost\u0159ed\u00ed citliv\u00e1 na teplo, jako je nap\u0159\u00edklad trysk\u00e1n\u00ed.<\/p>\n
Ostr\u00e1 a tvrd\u00e1 brusn\u00e1 zrna karbidu k\u0159em\u00edku jsou skv\u011blou volbou pro brou\u0161en\u00ed keramiky, skla, kamene, mramoru, sklen\u011bn\u00fdch vl\u00e1ken a dal\u0161\u00edch nekovov\u00fdch materi\u00e1l\u016f, jako jsou keramick\u00e9 dla\u017edice. Krom\u011b toho funguje velmi efektivn\u011b p\u0159i trysk\u00e1n\u00ed, proto\u017ee jeho ostr\u00e1 abrazivn\u00ed zrna leptaj\u00ed a p\u0159ipravuj\u00ed podklad \u00fa\u010dinn\u011bji ne\u017e oxid hlinit\u00fd.<\/p>\n
Karbid k\u0159em\u00edku je tvrd\u00fd a odoln\u00fd, ale ne tak tvrd\u00fd jako diamant. Jeho tvrdost podle Brinella je p\u0159ibli\u017en\u011b 2400, zat\u00edmco tvrdost diamantu je v\u00edce ne\u017e 8100. Karbid k\u0159em\u00edku je d\u00edky sv\u00fdm vysok\u00fdm teplot\u00e1m a odolnosti vhodn\u00fd pro topn\u00e1 t\u011blesa v pr\u016fmyslov\u00fdch pec\u00edch i pro sou\u010d\u00e1sti \u010derpadel, raketov\u00fdch motor\u016f a automobil\u016f; jeho odolnost proti korozi znamen\u00e1, \u017ee spolehliv\u011b funguje i v kysel\u00e9m a z\u00e1sadit\u00e9m prost\u0159ed\u00ed po del\u0161\u00ed dobu.<\/p>\n
Brusiva z karbidu k\u0159em\u00edku maj\u00ed ost\u0159ej\u0161\u00ed a tvrd\u0161\u00ed zrna ne\u017e brusiva z oxidu hlin\u00edku, tak\u017ee jsou vhodn\u00e1 k \u0159ez\u00e1n\u00ed skla, plast\u016f, st\u0159edn\u011b hust\u00fdch d\u0159evovl\u00e1knit\u00fdch desek, kov\u016f a d\u0159eva mal\u00fdm tlakem. Krom\u011b toho karbid k\u0159em\u00edku dob\u0159e brous\u00ed tak\u00e9 kovy a d\u0159evo - av\u0161ak vzhledem k tomu, \u017ee nem\u00e1 tak pru\u017en\u00e9 vlastnosti, rychleji se opot\u0159ebov\u00e1v\u00e1 po del\u0161\u00edch cyklech trysk\u00e1n\u00ed.<\/p>\n
syntetick\u00fd materi\u00e1l s tvrdost\u00ed 9 stup\u0148\u016f podle Mohsovy stupnice, kterou v tvrdosti p\u0159ekon\u00e1v\u00e1 pouze diamant, kubick\u00fd nitrid boru a karbid boru. Je lehk\u00fd a p\u0159itom m\u00e1 vynikaj\u00edc\u00ed tepeln\u011b vodiv\u00e9 vlastnosti.<\/p>\n
Oxid hlinit\u00fd se dod\u00e1v\u00e1 v r\u016f\u017eov\u00e9, b\u00edl\u00e9 a hn\u011bd\u00e9 barv\u011b a je vhodn\u00fd k trysk\u00e1n\u00ed r\u016fzn\u00fdch materi\u00e1l\u016f. Zat\u00edmco keramick\u00fd nebo zirkonov\u00fd oxid hlinit\u00fd m\u016f\u017ee l\u00e9pe fungovat na povr\u0161\u00edch z nerezov\u00e9 oceli, oxid hlinit\u00fd vynik\u00e1 p\u0159i trysk\u00e1n\u00ed m\u011bk\u010d\u00edch ocelov\u00fdch slitin, kter\u00e9 je cenov\u011b v\u00fdhodn\u011bj\u0161\u00ed a z\u00e1rove\u0148 poskytuje del\u0161\u00ed pou\u017eit\u00ed ne\u017e jin\u00e1 abraziva - ide\u00e1ln\u00ed pro p\u0159\u00edpravu povrch\u016f p\u0159ed nanesen\u00edm n\u00e1t\u011br\u016f!<\/p>\n
Brusn\u00fd materi\u00e1l z karbidu k\u0159em\u00edku se m\u016f\u017ee pochlubit tvrdost\u00ed 9-9,5 podle Mohsovy stupnice a m\u00e1 zrna ostr\u00e1 jako b\u0159itva, kter\u00e1 snadno pro\u0159ez\u00e1vaj\u00ed tvrd\u00e9 materi\u00e1ly, jako je sklo, k\u00e1men a keramika. Bohu\u017eel v\u0161ak tento materi\u00e1l ne\u0159e\u017ee kovy nebo tvrd\u00e9 d\u0159evo t\u00e9m\u011b\u0159 tak efektivn\u011b.<\/p>\n
Brusiva z karbidu k\u0159em\u00edku jsou tak\u00e9 m\u00e9n\u011b odoln\u00e1 ne\u017e jejich prot\u011bj\u0161ky z oxidu hlin\u00edku, postupn\u011b se opot\u0159ebov\u00e1vaj\u00ed pou\u017e\u00edv\u00e1n\u00edm a nakonec se rozpadaj\u00ed na mal\u00e9 kousky podobn\u00e9 \u017eiletk\u00e1m, kter\u00e9 lze znovu pou\u017e\u00edt. Krom\u011b toho se jejich \u00fazk\u00fd tvar pou\u017e\u00edv\u00e1n\u00edm postupn\u011b opot\u0159ebov\u00e1v\u00e1. A kone\u010dn\u011b, jejich nedostate\u010dn\u00e1 tv\u00e1rnost \u010din\u00ed brou\u0161en\u00ed tvrd\u00fdch materi\u00e1l\u016f n\u00e1ro\u010dn\u011bj\u0161\u00edm, stejn\u011b jako jejich rozbit\u00ed na ostr\u00e9 kousky pro op\u011btovn\u00e9 pou\u017eit\u00ed.<\/p>\n
Karbid k\u0159em\u00edku a karbid b\u00f3ru jsou d\u00edky sv\u00e9 extr\u00e9mn\u00ed tvrdosti \u0161iroce vyu\u017e\u00edv\u00e1ny v pr\u016fmyslu. Tepeln\u00e9 vlastnosti B4C mu umo\u017e\u0148uj\u00ed odol\u00e1vat vysok\u00fdm teplot\u00e1m bez degradace, zat\u00edmco polovodivost SiC a jeho schopnost pohlcovat neutrony jej \u010din\u00ed u\u017eite\u010dn\u00fdm v elektronick\u00fdch za\u0159\u00edzen\u00edch a aplikac\u00edch v jadern\u00e9 technice. Karbid k\u0159em\u00edku je naproti tomu v\u00edce vyu\u017e\u00edv\u00e1n jako brusn\u00fd materi\u00e1l; d\u00edky sv\u00fdm ni\u017e\u0161\u00edm n\u00e1klad\u016fm a vynikaj\u00edc\u00ed tvrdosti nab\u00edz\u00ed v\u011bt\u0161\u00ed cenovou dostupnost ve srovn\u00e1n\u00ed s karbidem wolframu, kter\u00fd se pou\u017e\u00edv\u00e1 pro pokro\u010dilej\u0161\u00ed pou\u017eit\u00ed, jako jsou obr\u00e1b\u011bc\u00ed aplikace nach\u00e1zej\u00edc\u00ed se v leteck\u00e9m pr\u016fmyslu nebo v l\u00e9ka\u0159sk\u00fdch aplikac\u00edch, ne\u017e jeho pokro\u010dilej\u0161\u00ed prot\u011bj\u0161ek.<\/p>\n
Karbid k\u0159em\u00edku se od oxidu hlinit\u00e9ho li\u0161\u00ed t\u00edm, \u017ee m\u00e1 \u00fazk\u00e1 a ostr\u00e1 abrazivn\u00ed zrna, kter\u00e1 se p\u0159i n\u00e1ro\u010dn\u00e9m trysk\u00e1n\u00ed rychle opot\u0159ebov\u00e1vaj\u00ed, tak\u017ee je cenov\u011b v\u00fdhodn\u011bj\u0161\u00ed pro tryskac\u00ed cykly na m\u011bkk\u00fdch materi\u00e1lech, jako je sklo, plast a d\u0159evovl\u00e1knit\u00e9 desky st\u0159edn\u00ed hustoty. Krom\u011b toho karbid k\u0159em\u00edku tak\u00e9 dob\u0159e lept\u00e1 a je vynikaj\u00edc\u00ed volbou pro p\u0159esn\u00e9 \u00fakoly.<\/p>\n
Tvrdost, tepeln\u00e1 vodivost a elektrick\u00e1 vodivost \u010din\u00ed z keramiky vynikaj\u00edc\u00ed materi\u00e1l pro pou\u017eit\u00ed v \u017e\u00e1ruvzdorn\u00fdch materi\u00e1lech, keramice a v\u00fdkonov\u00e9 elektronice. Keramika je tak\u00e9 dob\u0159e zn\u00e1m\u00e1 pro svou chemickou odolnost a schopnost pohlcovat neutrony, co\u017e umo\u017e\u0148uje jej\u00ed pou\u017eit\u00ed v n\u00e1ro\u010dn\u00fdch chemick\u00fdch prost\u0159ed\u00edch nebo v jadern\u00fdch aplikac\u00edch.<\/p>\n
Nejl\u00e9pe tyto dva druhy brusiva rozezn\u00e1te tak, \u017ee je pova\u0159\u00edte v koncentrovan\u00e9m roztoku NaOH; pokud se brusivo rozpust\u00ed, jedn\u00e1 se o oxid hlinit\u00fd; v opa\u010dn\u00e9m p\u0159\u00edpad\u011b by se mohlo jednat o karbid k\u0159em\u00edku. Proveden\u00ed tohoto jednoduch\u00e9ho testu v\u00e1m umo\u017en\u00ed rychle zjistit, kter\u00fd materi\u00e1l nejl\u00e9pe vyhovuje va\u0161emu \u00fakolu, ani\u017e byste se museli ob\u00e1vat p\u0159\u00edli\u0161 rychl\u00e9ho opot\u0159eben\u00ed. Pochopen\u00edm jejich rozd\u00edl\u016f a podobnost\u00ed p\u0159i pou\u017eit\u00ed na pracovi\u0161ti se podstatn\u011b zv\u00fd\u0161\u00ed efektivita, bezpe\u010dnost a \u017eivotnost.<\/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\/cs\/wp-json\/wp\/v2\/posts\/160","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/comments?post=160"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/posts\/160\/revisions"}],"predecessor-version":[{"id":161,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/posts\/160\/revisions\/161"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/media?parent=160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/categories?post=160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/cs\/wp-json\/wp\/v2\/tags?post=160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}