Sil\u012bcija karb\u012bds, ko d\u0113v\u0113 ar\u012b par karborundumu\/karbornmu\/, ir \u0101rk\u0101rt\u012bgi cietais un iztur\u012bgs sil\u012bcija un oglek\u013ca krist\u0101lisks savienojums, ko jau kop\u0161 19. gadsimta beig\u0101m pla\u0161i izmanto k\u0101 r\u016bpniec\u012bbas materi\u0101lu.<\/p>\n
Lai gan dab\u012bgi sastopamais moissan\u012bts ir atrodams meteor\u012btos un kimberl\u012bta atradn\u0113s, liel\u0101k\u0101 da\u013ca SiC m\u016bsdien\u0101s tiek ra\u017eota sint\u0113tiski, vai nu iz\u0161\u0137\u012bdinot oglekli izkaus\u0113t\u0101 sil\u012bcij\u0101, vai izmantojot \u0137\u012bmisk\u0101s tvaika nogulsn\u0113\u0161anas procesus.<\/p>\n
Pateicoties sil\u012bcija karb\u012bda izcilajai siltumvad\u012btsp\u0113jai, tas sp\u0113j iztur\u0113t augstas darba temperat\u016bras. \u0160\u012b \u012bpa\u0161\u012bba pal\u012bdz \u0101tri un efekt\u012bvi novad\u012bt siltumu, t\u0101d\u0113j\u0101di pasarg\u0101jot materi\u0101lu no kaus\u0113\u0161an\u0101s vai l\u016bzumiem smagos apst\u0101k\u013cos.<\/p>\n
Aizsarg\u0101jot iek\u0101rtas pret nodilumu, tas pal\u012bdz pagarin\u0101t to kalpo\u0161anas laiku. Pateicoties zemajam siltuma izple\u0161an\u0101s koeficientam un izcilajai ciet\u012bbai, tas ir iztur\u012bgs pret meh\u0101nisk\u0101m slodz\u0113m, piem\u0113ram, berzi un nodilumu.<\/p>\n
Melna sil\u012bcija karb\u012bda pulverim rakstur\u012bgs stingri kontrol\u0113ts da\u013ci\u0146u izm\u0113rs, kas nodro\u0161ina izcilu grie\u0161anas \u0101trumu un virsmas apdari, t\u0101d\u0113j\u0101di padarot to piem\u0113rotu da\u017e\u0101diem pielietojumiem, piem\u0113ram, stiklveida un sve\u0137u sl\u012bp\u0113\u0161anas diskiem, str\u016bklas apstr\u0101des graudu\/pulvera mais\u012bjumiem, mais\u012bjumiem, lapp\u0113\u0161anai, pul\u0113\u0161anai, pretsl\u012bd\u0113\u0161anas apstr\u0101dei, k\u0101 ar\u012b sil\u012bcija un kvarca grie\u0161anai ar stiep\u013cu z\u0101\u0123i.<\/p>\n
Karborunduma grafikas tehnika \u2014 tradicion\u0101la kolagrafijas metode, kur\u0101 uz alum\u012bnija pl\u0101ksnes tiek uzkl\u0101ts karborunduma smil\u0161u sl\u0101nis un p\u0101rkl\u0101ts ar kr\u0101su, p\u0113c tam pl\u0101ksne tiek izlaista caur velt\u0146u presi, lai uz pap\u012bra ieg\u016btu iespieddarbus ar dabisku fakt\u016bru, kas liecina par to iztur\u012bbu.<\/p>\n
SiC ir \u0101rk\u0101rt\u012bgi cietais materi\u0101ls (9 p\u0113c Mosa skalas). Turkl\u0101t t\u0101 iztur\u012bba pret nodilumu padara to piem\u0113rotu izmanto\u0161anai sporta automa\u0161\u012bnu keramiskajos brem\u017eu diskos, bru\u0146u vest\u0113s, k\u0101 ar\u012b s\u016bk\u0146u v\u0101rpstu bl\u012bv\u0113jos. Turkl\u0101t \u0161is materi\u0101ls sp\u0113j iztur\u0113t \u0101rk\u0101rt\u012bgi augstas temperat\u016bras, vienlaikus saglab\u0101jot savu integrit\u0101ti saskarsm\u0113 ar citiem cietiem materi\u0101liem, piem\u0113ram, t\u0113raudu.<\/p>\n
Tam piem\u012bt izcila iztur\u012bba pret oksid\u0113\u0161anos temperat\u016br\u0101 l\u012bdz aptuveni 1400 \u00b0C, un tas ir ne\u0161\u0137\u012bst \u016bden\u012b, spirt\u0101 un sk\u0101b\u0113s, iz\u0146emot fluor\u016bde\u0146ra\u017esk\u0101bi.<\/p>\n
Za\u013co SIC var ra\u017eot no t\u012bra kvarca smilts un naftas koksa, to apstr\u0101d\u0101jot ar da\u017e\u0101d\u0101m form\u0113\u0161anas metod\u0113m un sinter\u0113jot augst\u0101 temperat\u016br\u0101 elektriskaj\u0101 iek\u0161\u0113j\u0101s pretest\u012bbas kr\u0101sn\u012b, lai ieg\u016btu gan saist\u012btus, gan reakcijas ce\u013c\u0101 saist\u012btus izstr\u0101d\u0101jumus. Uz\u0146\u0113mums \u201eSaint-Gobain Performance Ceramics & Refractories\u201c izmanto \u0161o produktu abraz\u012bvo materi\u0101lu, metalur\u0123ijas un speci\u0101lo ugunsiztur\u012bgo materi\u0101lu ra\u017eo\u0161an\u0101, k\u0101 ar\u012b met\u0101la matricas kompoz\u012btu un kr\u0101sns piederumu ra\u017eo\u0161an\u0101 \u2013 neaizmirstot ar\u012b kompoz\u012btu bru\u0146u sist\u0113mu ra\u017eo\u0161anu!<\/p>\n
Sil\u012bcija karb\u012bds ir pier\u0101d\u012bjis savu iztur\u012bbu, izturot ekstrem\u0101lus \u0137\u012bmiskos apst\u0101k\u013cus un vidi, piem\u0113ram, r\u016bpn\u012bc\u0101s izmantotajos sl\u012bp\u0113\u0161anas diskos. Turkl\u0101t to izmanto sl\u012bp\u0113\u0161anai un pul\u0113\u0161anai, k\u0101 ar\u012b r\u016bpnieciskajiem grie\u0161anas un urb\u0161anas darbiem; papildus tam tam piem\u012bt augsta nodilumiztur\u012bba, kas padara to piem\u0113rotu izmanto\u0161anai metalur\u0123ij\u0101.<\/p>\n
Jau kop\u0161 19. gadsimta beig\u0101m silikona gumija tiek izmantota da\u017e\u0101diem m\u0113r\u0137iem, tostarp abraz\u012bvajos materi\u0101los un sl\u012bp\u0113\u0161anas r\u012bkos, k\u0101 ar\u012b ugunsiztur\u012bgajos ap\u0161uvumos un kr\u0101sns velt\u0146os. Pateicoties t\u0101s izcilajai temperat\u016bras iztur\u012bbai un iztur\u012bbai pret termiskajiem triecieniem, silikona gumija ir lieliska materi\u0101la izv\u0113le kosmosa un avi\u0101cijas nozar\u0113.<\/p>\n
Sil\u012bcija karb\u012bda pulveri var ieg\u016bt, kaus\u0113jot kvarca smiltis un og\u013cu koksu elektriskaj\u0101 pretest\u012bbas kr\u0101sn\u012b 2500degC temperat\u016br\u0101, p\u0113c tam to sasmalcinot vai veidojot cietos priek\u0161metos. Liel\u0101kus monokrist\u0101lus var audz\u0113t no t\u012bra sil\u012bcija un oglek\u013ca tvaika \u0101rk\u0101rt\u012bgi liel\u0101 vakuum\u0101 3500 \u00b0C temperat\u016br\u0101, izmantojot l\u012bdz\u012bgus procesus k\u0101 pusvad\u012bt\u0101ju pl\u0101ksn\u012bt\u0113m. Past\u0101v polimorfas, jeb strukt\u016bras ar da\u017e\u0101d\u0101m krist\u0101lisk\u0101m strukt\u016br\u0101m, kuras atkar\u012bb\u0101 no to atom\u0101r\u0101s strukt\u016bras var klasific\u0113t k\u0101 alfa vai beta; alfa parasti ir se\u0161st\u016braina (vurtz\u012bts).<\/p>\n
Sil\u012bcija karb\u012bds, kas ir neoks\u012bda keramikas materi\u0101ls, sp\u0113j iztur\u0113t augstas temperat\u016bras un nodilumu. T\u0101d\u0113\u013c to jau sen izmanto k\u0101 iztur\u012bgu deta\u013cu sl\u012bp\u0113\u0161anas, hon\u0113\u0161anas un smil\u0161u str\u016bklas apstr\u0101des procesos, turkl\u0101t to bie\u017ei izmanto ar\u012b kosmosa un automobi\u013cu r\u016bpniec\u012bb\u0101 k\u0101 abraz\u012bvu materi\u0101lu da\u017e\u0101du materi\u0101lu pul\u0113\u0161anai.<\/p>\n
Alum\u012bnijs nerea\u0123\u0113 ar sk\u0101b\u0113m un iztur temperat\u016bras l\u012bdz 1600 \u00b0C. Pateicoties t\u0101 tetraedriskajai krist\u0101lstrukt\u016brai, noteiktos apst\u0101k\u013cos tas sp\u0113j pretoties oksid\u0101cijai \u2013 tom\u0113r, ja tas ilgsto\u0161i tiek pak\u013cauts augstai sk\u0101bek\u013ca koncentr\u0101cijai, tas var \u0101tri oksid\u0113ties.<\/p>\n
Rekristaliz\u0101cija, karst\u0101 pres\u0113\u0161ana, mikrovi\u013c\u0146u sa\u0137epin\u0101\u0161ana, sa\u0137epin\u0101\u0161ana bez spiediena un reakcijas sa\u0137epin\u0101\u0161ana ir da\u017eas no metod\u0113m, kas pieejamas, lai izgatavotu keramiku da\u017e\u0101d\u0101s form\u0101s un izm\u0113ros. Keramiku pla\u0161i izmanto k\u0101 sast\u0101vda\u013cu termiski iztur\u012bgajos ugunsiztur\u012bgajos materi\u0101los un keramikas izstr\u0101d\u0101jumos, ko izmanto k\u0101 sast\u0101vda\u013cas bru\u0146u vest\u0113s; turkl\u0101t t\u0101s stingr\u012bba un iztur\u012bba padara to piem\u0113rotu ar\u012b astronomisko teleskopu spogu\u013ciem.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide, also referred to as carborundum\/karbornm\/ is an exceptionally hard and durable crystalline compound of silicon and carbon that […]<\/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-40","post","type-post","status-publish","format-standard","hentry","category-product-related"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/40","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/comments?post=40"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/40\/revisions"}],"predecessor-version":[{"id":41,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/40\/revisions\/41"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/media?parent=40"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/categories?post=40"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/tags?post=40"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}