{"id":70,"date":"2024-03-31T03:41:48","date_gmt":"2024-03-30T19:41:48","guid":{"rendered":"http:\/\/siliconcarbideceramic.net\/?p=70"},"modified":"2024-07-15T20:47:30","modified_gmt":"2024-07-15T12:47:30","slug":"parkristalizets-silicija-karbids","status":"publish","type":"post","link":"https:\/\/siliconcarbideceramic.net\/lv\/recrystallized-silicon-carbide\/","title":{"rendered":"P\u0101rkristaliz\u0113ts sil\u012bcija karb\u012bds"},"content":{"rendered":"

Sil\u012bcija karb\u012bds ir \u0101rk\u0101rt\u012bgi cieta keramika, kurai piem\u012bt izcila temperat\u016bras stabilit\u0101te un iztur\u012bba pret koroziju, t\u0101p\u0113c to pla\u0161i izmanto \u0137\u012bmijas, metalur\u0123ijas un nodilumiztur\u012bbas nozar\u0113s.<\/p>\n

RSiC tiek ra\u017eots iztvaic\u0113\u0161anas-koagul\u0101cijas proces\u0101 augst\u0101 temperat\u016br\u0101, un tam piem\u012bt atv\u0113rta porain\u012bba no 11-15%, liels graudu izm\u0113rs un tas nesa\u0161aurin\u0101s apdedzin\u0101\u0161anas procesa laik\u0101.<\/p>\n

Augsta porain\u012bba<\/h2>\n

P\u0101rkristaliz\u0113ts sil\u012bcija karb\u012bds at\u0161\u0137iras no daudz\u0101m porain\u0101m keramikas izstr\u0101d\u0101jumiem ar to, ka apdedzin\u0101\u0161anas laik\u0101 tas nesamazin\u0101s, t\u0101d\u0113j\u0101di \u013caujot izgatavot liel\u0101kas deta\u013cas ar zem\u0101k\u0101m ener\u0123ijas izmaks\u0101m un \u012bs\u0101kos ra\u017eo\u0161anas ciklos. Turkl\u0101t \u0161is materi\u0101ls var iztur\u0113t termiskus triecienus, k\u0101 ar\u012b augstas temperat\u016bras, neboj\u0101jot t\u0101 strukt\u016bru.<\/p>\n

Poru lielumam un mikrostrukt\u016brai ir b\u016btiska noz\u012bme porain\u0101 sil\u012bcija karb\u012bda elektrisk\u0101s pretest\u012bbas noteik\u0161an\u0101. Mainot sa\u0137epin\u0101\u0161anas temperat\u016bru un CIP spiediena iestat\u012bjumus, poru izm\u0113ru var piel\u0101got konkr\u0113tiem lietojumiem, savuk\u0101rt \u0137\u012bmisk\u0101 sast\u0101va korekcijas \u013cauj attiec\u012bgi main\u012bt porain\u012bbu.<\/p>\n

Poru izm\u0113ru var kontrol\u0113t ar\u012b ar otr\u0101s f\u0101zes piedev\u0101m, piem\u0113ram, oks\u012bdiem vai silic\u012bdiem. Manipul\u0113jot ar faktoriem, kas ietekm\u0113 porain\u0101 sil\u012bcija karb\u012bda elektrisko pretest\u012bbu, var rasties jauni un aizraujo\u0161i pielietojumi daudz\u0101s jom\u0101s.<\/p>\n

Augsta iztur\u012bba<\/h2>\n

P\u0101rkristaliz\u0113tai sil\u012bcija karb\u012bda keramikai piem\u012bt uzlabota mikrostrukt\u016bra, kas nodro\u0161ina izcilas meh\u0101nisk\u0101s, termisk\u0101s un elektrisk\u0101s \u012bpa\u0161\u012bbas vis\u0101s temperat\u016br\u0101s, tostarp izm\u0113ru stabilit\u0101ti, iztur\u012bbu pret koroziju un iztur\u012bbu pat ekstrem\u0101los karstuma l\u012bme\u0146os. Pateicoties \u0161\u012bm \u012bpa\u0161\u012bb\u0101m, RSiC keramika ir lieliska izv\u0113le izmanto\u0161anai k\u0101 kr\u0101sns m\u0113bel\u0113m (piem\u0113ram, tune\u013cu, \u0161\u016bpu\u013ckr\u0101sn\u012bm un dubultrull\u012b\u0161u kr\u0101sn\u012bm) vai pat bru\u0146u pl\u0101ksn\u0113m pret ballistisko ra\u0137e\u0161u uzbrukumiem.<\/p>\n

Silik\u0101ta saist\u012btais sil\u012bcija karb\u012bds (SiC), kas ieg\u016bts no rupjgraudaina un vid\u0113ji graudaina SiC pulvera, kas sa\u0137epin\u0101ts ar 5-15% aluminosilik\u0101ta saistvielu, ir ar viendab\u012bgu strukt\u016bru un izcilu iztur\u012bbu pie lieces; turkl\u0101t tam piem\u012bt izcila iztur\u012bba pret oksid\u0101ciju. Sal\u012bdzin\u0101jumam, RSiC ir viendab\u012bg\u0101ka strukt\u016bra ar liel\u0101ku lieces iztur\u012bbu, k\u0101 ar\u012b paaugstin\u0101tu iztur\u012bbu pret oksid\u0101ciju.<\/p>\n

RSiC tiek ra\u017eots iztvaic\u0113\u0161anas-kondens\u0101cijas proces\u0101, kas rada t\u012br\u0101ku un bl\u012bv\u0101ku materi\u0101lu nek\u0101 standarta pulverveida sa\u0137epin\u0101\u0161anas procesi, kas noz\u012bm\u0113, ka poru aizpild\u012b\u0161anai nepiecie\u0161ams maz\u0101k met\u0101lisk\u0101 sil\u012bcija, t\u0101d\u0113j\u0101di samazinot plaisu ra\u0161an\u0101s risku sa\u0137epin\u0101\u0161anas laik\u0101 un nodro\u0161inot prec\u012bz\u0101ku deta\u013cu \u0123eometriju, jo infiltr\u0101cijas laik\u0101 nav sarauties.<\/p>\n

Augsta termisk\u0101 stabilit\u0101te<\/h2>\n

Sil\u012bcija karb\u012bds izce\u013cas ar izcilu \u0137\u012bmisko stabilit\u0101ti un iztur\u012bbu pret termiskiem triecieniem, k\u0101 ar\u012b zemu izple\u0161an\u0101s koeficientu. Tas var iztur\u0113t temperat\u016bru l\u012bdz 2200 gr\u0101diem C. Pateicoties \u0161ai augstajai temperat\u016bras stabilit\u0101tei, sil\u012bcija karb\u012bds ir lielisks materi\u0101ls ener\u0123ijas ra\u017eo\u0161anas iek\u0101rt\u0101m, piem\u0113ram, kodolreaktoriem vai saules sp\u0113kstacij\u0101m.<\/p>\n

Reakcijas sa\u0137epin\u0101\u0161ana ir viena no vispla\u0161\u0101k izmantotaj\u0101m keramikas ra\u017eo\u0161anas metod\u0113m, kur\u0101 sil\u012bcija un oglek\u013ca atomi tiek sajaukti kop\u0101 sil\u012bcija dioks\u012bda pulver\u012b, veidojot keramikas materi\u0101lu ar dimanta ciet\u012bbas \u012bpa\u0161\u012bb\u0101m un kompaktu strukt\u016bru, kas \u013cauj izgatavot da\u017e\u0101das formas deta\u013cas.<\/p>\n

CoorsTek, Saint-Gobain Ceramic Materials, ESK-SIC GmbH un Fiven ir vieni no tirgus l\u012bderiem p\u0101rkristaliz\u0113ta sil\u012bcija karb\u012bda ra\u017eo\u0161an\u0101, un katram no tiem ir ilga v\u0113sture sav\u0101 nozar\u0113, un tie piev\u0113r\u0161as inov\u0101cij\u0101m. Lai gan prec\u012bzi p\u0101rdo\u0161anas r\u0101d\u012bt\u0101ji nav publiski pieejami, \u0161ie uz\u0146\u0113mumi saglab\u0101 iev\u0113rojamu kl\u0101tb\u016btni tirg\u016b un, \u0161\u0137iet, ir labi sagatavoti turpm\u0101kai izaugsmei n\u0101kotn\u0113.<\/p>\n

Augsta iztur\u012bba pret koroziju<\/h2>\n

Sil\u012bcija karb\u012bds izce\u013cas ar izcilu iztur\u012bbu pret koroziju, pateicoties t\u0101 dabiskajai materi\u0101la strukt\u016brai, kas sast\u0101v no savstarp\u0113ji savienotiem pl\u0101ksn\u012bt\u0113m l\u012bdz\u012bgiem graudiem, kas perpendikul\u0101ri izvietoti pa virsmu. Turkl\u0101t t\u0101 unik\u0101l\u0101 mikrostrukt\u016bra nodro\u0161ina nep\u0101rsp\u0113jamu iztur\u012bbu pret eroziju\/abr\u0101ziju\/termiskajiem triecieniem, k\u0101 ar\u012b izm\u0113ru stabilit\u0101ti augst\u0101 temperat\u016br\u0101, padarot to par ide\u0101lu materi\u0101lu kr\u0101sns m\u0113be\u013cu ra\u017eo\u0161anai un citiem augsttemperat\u016bras lietojumiem r\u016bpniec\u012bb\u0101.<\/p>\n

P\u0101rkristaliz\u0113tu sil\u012bcija karb\u012bdu var veidot, izmantojot sl\u012bdo\u0161\u0101s lie\u0161anas, ekstr\u016bzijas un iesmidzin\u0101\u0161anas procesus, lai ieg\u016btu materi\u0101lu ar izcilu iztur\u012bbu \u013coti augst\u0101 temperat\u016br\u0101. T\u0101 iztur\u012bba padara to \u012bpa\u0161i piem\u0113rotu tune\u013ckr\u0101\u0161\u0146u, \u0161\u016bpu\u013ckr\u0101\u0161\u0146u un lejupejo\u0161\u0101s apdedzin\u0101\u0161anas kr\u0101\u0161\u0146u neso\u0161o konstrukciju r\u0101mju izgatavo\u0161anai, jo tas \u013cauj iztur\u0113t \u013coti augstas temperat\u016bras, vienlaikus uzlabojot kr\u0101\u0161\u0146u oder\u0113juma iztur\u012bbu pret oksid\u0101ciju un samazinot ener\u0123ijas pat\u0113ri\u0146u.<\/p>\n

P\u0101rkristaliz\u0113ts sil\u012bcija karb\u012bds pied\u0101v\u0101 ar\u012b lielu potenci\u0101lu met\u0101liem pastiprin\u0101tas keramikas ra\u017eo\u0161an\u0101, nodro\u0161inot efekt\u012bvu met\u0101lu un keramikas apvieno\u0161anu progres\u012bvos tehniskos komponentos, ko izmanto saules ener\u0123ijas tor\u0146os.<\/p>\n

\"P\u0101rkristaliz\u0113ts<\/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\/lv\/wp-json\/wp\/v2\/posts\/70","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=70"}],"version-history":[{"count":3,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/70\/revisions"}],"predecessor-version":[{"id":165,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/70\/revisions\/165"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/media?parent=70"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/categories?post=70"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/tags?post=70"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}