Sil\u012bcija karb\u012bds ir neaizst\u0101jams struktur\u0101ls keramikas materi\u0101ls, pateicoties t\u0101 izcilajai iztur\u012bbai augst\u0101s temperat\u016br\u0101s un iztur\u012bbai pret oksid\u0101ciju, kas padara to neaizst\u0101jamu meh\u0101nisk\u0101s ra\u017eo\u0161anas, kosmisk\u0101s avi\u0101cijas tehnolo\u0123iju un inform\u0101cijas elektronikas jom\u0101.<\/p>\n
Reakcijas sa\u0137epin\u0101\u0161ana nodro\u0161ina zemas temperat\u016bras un \u012bsu sa\u0137epin\u0101\u0161anas laiku, vienlaikus ieg\u016bstot gandr\u012bz neto izm\u0113ra formas, ta\u010du to ierobe\u017eo nevienm\u0113r\u012bgs bl\u012bvuma sadal\u012bjums, sa\u0137epin\u0101to produktu plais\u0101\u0161ana un nepietiekama sil\u012bcija iek\u013c\u016b\u0161ana sa\u0137epin\u0101\u0161anas procesu laik\u0101.<\/p>\n
Sil\u012bcija karb\u012bds ir \u0101rk\u0101rt\u012bgi ciets un iztur\u012bgs keramikas materi\u0101ls, kas paz\u012bstams ar savu izcilo iztur\u012bbu augst\u0101 temperat\u016br\u0101, nodilumiztur\u012bbu un iztur\u012bbu pret \u0137\u012bmisko oksid\u0101ciju. \u0160o \u012bpa\u0161\u012bbu d\u0113\u013c sil\u012bcija karb\u012bdu izmanto daudz\u0101s r\u016bpniec\u012bbas nozar\u0113s, tostarp kodolsp\u0113kstacij\u0101s, kr\u0101sn\u012bs, reakt\u012bvajos dzin\u0113jos, ra\u0137e\u0161u sprausl\u0101s un pap\u012bra ra\u017eo\u0161an\u0101.<\/p>\n
Viens no veidiem, k\u0101 uzlabot sa\u0137epin\u0101t\u0101 sil\u012bcija karb\u012bda meh\u0101nisk\u0101s \u012bpa\u0161\u012bbas augst\u0101 temperat\u016br\u0101, ir pievienot piedevas, piem\u0113ram, alum\u012bniju, boru un oglekli (SiC-ABC), kas uzlabo iztur\u012bbu pret sl\u012bd\u0113\u0161anu. \u0160\u012bs piedevas maina graudu robe\u017eu ener\u0123iju un virsmas ener\u0123iju, vienlaikus palielinot tilpuma dif\u016bzijas \u0101trumu un kav\u0113jot stikla veido\u0161anos graudu robe\u017e\u0101s.<\/p>\n
V\u0113l viens veids, k\u0101 uzlabot meh\u0101nisk\u0101s \u012bpa\u0161\u012bbas, ir bezspiediena sa\u0137epin\u0101\u0161ana, kas ietver SiC pulvera kompaktu sa\u0137epin\u0101\u0161anu bez \u0101r\u0113ja spiediena pielik\u0161anas. \u0160\u012bs metodes priek\u0161roc\u012bba ir t\u0101, ka t\u0101 nov\u0113r\u0161 bl\u012bvuma sv\u0101rst\u012bbas, ko izraisa tradicion\u0101l\u0101s karst\u0101s pres\u0113\u0161anas sa\u0137epin\u0101\u0161anas metodes, kuru rezult\u0101t\u0101 rodas iev\u0113rojamas izm\u0113ru izmai\u0146as un pazemin\u0101s izstr\u0101d\u0101jumu kvalit\u0101te, k\u0101 ar\u012b rada bl\u012bvumu, kas ir tuv\u0101ks teor\u0113tiskaj\u0101m v\u0113rt\u012bb\u0101m nek\u0101 jebkad agr\u0101k.<\/p>\n
Sil\u012bcija karb\u012bdam piem\u012bt izcila iztur\u012bba pret \u0137\u012bmisko koroziju da\u017e\u0101d\u0101s vid\u0113s l\u012bdz 1700 gr\u0101diem p\u0113c C, piem\u0113ram, saus\u0101 sk\u0101bekl\u012b, karstos g\u0101zveida tvaikos un \u0161\u0137idros s\u0101\u013cos un met\u0101los, k\u0101 ar\u012b izkaus\u0113tos s\u0101\u013cos un og\u013cu pelnu s\u0101r\u0146os.<\/p>\n
Sinter\u0113tais sil\u012bcija karb\u012bds nodro\u0161ina izcilu iztur\u012bbu pret koroziju, pateicoties t\u0101 strukt\u016brai un virsmas kvalit\u0101tei. \u0160im materi\u0101lam piem\u012bt sp\u0113c\u012bga iztur\u012bba pret eroziju (sl\u012bd\u0113\u0161anu), meh\u0101nisko iztur\u012bbu, termisko triecienu un nodilumu.<\/p>\n
Augst\u0101 temperat\u016br\u0101 sa\u0137epin\u0101tais sil\u012bcija karb\u012bda materi\u0101ls XICAR (parasti saukts par Hexoloy SE alternat\u012bvu) ir izr\u0101d\u012bjies \u013coti iztur\u012bgs pret \u0137\u012bmisko koroziju sk\u0101b\u0101 vid\u0113, piem\u0113ram, koncentr\u0113t\u0101 HCl un HNO3, un ar Y2O3 apstr\u0101d\u0101tiem paraugiem ir liel\u0101ka iztur\u012bba nek\u0101 paraugiem, kuros izmantots MgO sa\u0137epin\u0101\u0161anas pal\u012bgl\u012bdzeklis.<\/p>\n
Rea\u0123\u0113jot saist\u012btais sa\u0137epin\u0101tais sil\u012bcija karb\u012bds, ko parasti d\u0113v\u0113 par pa\u0161savienojo\u0161o sil\u012bcija karb\u012bdu, tiek ieg\u016bts, rea\u0123\u0113jot oglekli saturo\u0161am porainam keramikas \u0137ermenim ar \u0161\u0137idro sil\u012bciju. \u0160is mais\u012bjums iefiltr\u0113jas keramikas korpus\u0101, rea\u0123\u0113 ar graf\u012btu, veidojot b-SiC, un p\u0113c tam savienojas ar eso\u0161aj\u0101m a-SiC da\u013ci\u0146\u0101m, lai veidotu pilna bl\u012bvuma reakcijas sa\u0137epin\u0101tu sil\u012bcija karb\u012bdu ar da\u017e\u0101d\u0101m form\u0101m, kas pieejamas \u0161aj\u0101 proces\u0101.<\/p>\n
Sil\u012bcija karb\u012bds ir viens no iztur\u012bg\u0101kajiem keramikas materi\u0101liem. T\u0101 k\u0101 sil\u012bcija karb\u012bds ir iztur\u012bgs pret augst\u0101m temperat\u016br\u0101m un oksid\u0101ciju, tas ir lielisks materi\u0101ls, ko var izmantot daudzos r\u016bpnieciskos lietojumos.<\/p>\n
Sil\u012bcija karb\u012bda keramiku parasti var izgatavot, izmantojot bezspiediena sa\u0137epin\u0101\u0161anas vai reakcijas sa\u0137epin\u0101\u0161anas ra\u017eo\u0161anas procesus, un Saint-Gobain Performance Ceramics & Refractories pied\u0101v\u0101 abus veidus, lai atbilstu da\u017e\u0101diem gala lietojumiem.<\/p>\n
Bez spiediena sa\u0137epin\u0101tu sil\u012bcija karb\u012bdu ra\u017eo, apvienojot smalku da\u013ci\u0146u SiC pulveri ar sa\u0137epin\u0101\u0161anas pal\u012bgviel\u0101m, kas nav oks\u012bdi, un sa\u0137epinot to temperat\u016br\u0101, kas augst\u0101ka par 2000 gr\u0101diem C inert\u0101 atmosf\u0113r\u0101, ieg\u016bstot augsta bl\u012bvuma materi\u0101lu ar izcilu iztur\u012bbu pret oksid\u0101ciju, iztur\u012bbu pret koroziju un meh\u0101nisk\u0101m \u012bpa\u0161\u012bb\u0101m.<\/p>\n
Reakcijas sa\u0137epin\u0101\u0161ana ir jauns process sil\u012bcija karb\u012bda (SiC) keramikas ra\u017eo\u0161an\u0101, kas pied\u0101v\u0101 t\u0101das priek\u0161roc\u012bbas k\u0101 bl\u012bvas strukt\u016bras, zem\u0101kas apstr\u0101des temperat\u016bras, formas iesp\u0113jas, zemas izmaksas un augst\u0101ka t\u012br\u012bba. Tom\u0113r diem\u017e\u0113l t\u0101 lieces iztur\u012bba ir daudz zem\u0101ka nek\u0101 standarta sa\u0137epin\u0101t\u0101 SiC, jo t\u0101 mikrostrukt\u016br\u0101 ir oglek\u013ca (Si) atlikumi.<\/p>\n
Sinter\u0113ta sil\u012bcija karb\u012bda keramika ir viens no ciet\u0101kajiem un iztur\u012bg\u0101kajiem keramikas materi\u0101liem, kas joproj\u0101m ir iztur\u012bgs ar\u012b \u013coti augst\u0101s temperat\u016br\u0101s, t\u0101p\u0113c tas ir lieliska izv\u0113le lietojumiem, kur ir svar\u012bga iztur\u012bba pret augst\u0101m temperat\u016br\u0101m.<\/p>\n
SSIC uzr\u0101da gandr\u012bz nemain\u012bgu stipr\u012bbu pla\u0161\u0101 temperat\u016bras diapazon\u0101 un saglab\u0101 savu iztur\u012bbu pat zem liela spiediena, padarot to par \u013coti popul\u0101ru materi\u0101lu augstas veiktsp\u0113jas s\u016bk\u0146u deta\u013c\u0101m un cit\u0101m svar\u012bg\u0101m iek\u0101rtu da\u013c\u0101m.<\/p>\n
SSIC ra\u017eo, izmantojot parast\u0101s keramikas form\u0113\u0161anas metodes. P\u0113c tam, kad SSIC ir noform\u0113ti vajadz\u012bgaj\u0101 form\u0101, tie tiek sa\u0137epin\u0101ti augst\u0101 temperat\u016br\u0101 un spiedien\u0101 inertas g\u0101zes atmosf\u0113r\u0101.<\/p>\n
Sinter\u0113\u0161anu var iedal\u012bt div\u0101s at\u0161\u0137ir\u012bg\u0101s f\u0101z\u0113s - ciet\u0101s f\u0101zes un \u0161\u0137idr\u0101s f\u0101zes sa\u0137epin\u0101\u0161an\u0101. Ciet\u0101s f\u0101zes sa\u0137epin\u0101\u0161anai nepiecie\u0161ams pievienot C un B k\u0101 sa\u0137epin\u0101\u0161anas pal\u012bgl\u012bdzek\u013cus, lai samazin\u0101tu SiC keramikas graudu robe\u017eu ener\u0123iju, savuk\u0101rt \u0161\u0137idr\u0101 f\u0101z\u0113 k\u0101 a\u0123entu izmanto vienu vai vair\u0101kus elementu eitektiskos oks\u012bdus (piem\u0113ram, Y2O3), radot elektrol\u012btisku f\u0101zi ar kust\u012bbu, dif\u016bziju un masas p\u0101rnesi starp sil\u012bcija oks\u012bda da\u013ci\u0146\u0101m, lai bl\u012bvin\u0101tu materi\u0101la bl\u012bvumu.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide is an irreplaceable structural ceramic material due to its exceptional high temperature strength and oxidation resistance, making it […]<\/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-72","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\/72","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=72"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/72\/revisions"}],"predecessor-version":[{"id":73,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/72\/revisions\/73"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/media?parent=72"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/categories?post=72"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/tags?post=72"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}