{"id":404,"date":"2026-10-11T21:35:13","date_gmt":"2026-10-11T13:35:13","guid":{"rendered":"https:\/\/siliconcarbideceramic.net\/?p=404"},"modified":"2026-10-11T21:35:13","modified_gmt":"2026-10-11T13:35:13","slug":"kapec-silicija-karbida-caurules-aukstaja-gala-plaisa-jau-pec-daziem-menesiem","status":"publish","type":"post","link":"https:\/\/siliconcarbideceramic.net\/lv\/why-silicon-carbide-tubes-crack-at-the-cold-end-after-only-a-few-months\/","title":{"rendered":"K\u0101p\u0113c sil\u012bcija karb\u012bda caurules p\u0113c tikai da\u017eiem m\u0113ne\u0161iem plais\u0101 aukstaj\u0101 gal\u0101?"},"content":{"rendered":"<h1 dir=\"auto\"><strong>K\u0101p\u0113c sil\u012bcija karb\u012bda caurules aukstaj\u0101 gal\u0101 plais\u0101 jau p\u0113c da\u017eiem m\u0113ne\u0161iem periodisk\u0101s darb\u012bbas kr\u0101sn\u012bs?<\/strong><\/h1>\n<p dir=\"auto\">P\u0113c divpadsmit gadiem, str\u0101d\u0101jot ar augsttemperat\u016bras iek\u0101rt\u0101m \u0160anhajas apk\u0101rtn\u0113, visbie\u017e\u0101k nov\u0113rot\u0101 sil\u012bcija karb\u012bda cauru\u013cu boj\u0101juma c\u0113lonis nav pak\u0101peniska izpl\u016b\u0161ana vai \u0137\u012bmiska korozija. Tas ir skaidri redzams pl\u012bsums, kas rodas pie aukst\u0101 gala vai pie mont\u0101\u017eas atloka jau p\u0113c da\u017eiem m\u0113ne\u0161iem norm\u0101las darb\u012bbas partiju re\u017e\u012bm\u0101. Operatori parasti pie\u0146em, ka caurule bija boj\u0101ta vai ka kr\u0101sns temperat\u016bra vienk\u0101r\u0161i bija p\u0101r\u0101k augsta. Iek\u0101rt\u0101s, kuras es p\u0101rbaudu, pati caurule reti kad ir galvenais c\u0113lonis. Probl\u0113ma sl\u0113pjas strauj\u0101 temperat\u016bras gradienta un caurules nostiprin\u0101\u0161anas veida kombin\u0101cij\u0101.<\/p>\n<p dir=\"auto\">Sil\u012bcija karb\u012bda caurules, ko izmanto k\u0101 termop\u0101ru aizsargapvalkus vai \u012bsus starojuma elementus, labi iztur karstuma zonu. Materi\u0101lam ir laba iztur\u012bba un siltumvad\u012btsp\u0113ja, kad tas ir vienm\u0113r\u012bgi uzkarsis. Probl\u0113mas rodas katru reizi, kad kr\u0101sns tiek atdzes\u0113ta un atk\u0101rtoti uzkars\u0113ta. Iegremd\u0113t\u0101 vai uzkars\u0113t\u0101 da\u013ca paliek karst\u0101ka ilg\u0101k, kam\u0113r da\u013ca, kas izvirz\u012bta v\u0113s\u0101k\u0101 apk\u0101rt\u0113j\u0101 gais\u0101, strauji atdziest. Tas rada strauju temperat\u016bras starp\u012bbu pa \u012bsu sil\u012bcija karb\u012bda cauru\u013cu garumu. Sil\u012bcija karb\u012bdam ir zema siltuma izple\u0161an\u0101s, ta\u010du tas joproj\u0101m ir trausls. Kad karstajai un aukstajai da\u013cai rodas v\u0113lme main\u012bt garumu at\u0161\u0137ir\u012bg\u0101 \u0101trum\u0101, bet caurule aukstaj\u0101 gal\u0101 ir stingri nostiprin\u0101ta vai nosl\u0113gta, tie\u0161i p\u0101rejas zon\u0101 veidojas stiepes spriegums. P\u0113c pietiekami daudziem cikliem spriegums p\u0101rsniedz viet\u0113jo iztur\u012bbu un veidojas plaisa, kas bie\u017ei s\u0101kas uz \u0101r\u0113j\u0101s virsmas.<\/p>\n<p dir=\"auto\">\u0160o tendenci visvair\u0101k varu nov\u0113rot intermit\u0113jo\u0161\u0101s keramikas kr\u0101sn\u012bs un maz\u0101s met\u0101la termisk\u0101s apstr\u0101des kr\u0101sn\u012bs, kuras darbojas katru dienu vai vair\u0101kas reizes ned\u0113\u013c\u0101. Nep\u0101rtrauktas darb\u012bbas kr\u0101sn\u012bs ar l\u0113n\u0101ku temperat\u016bras paaugstin\u0101\u0161anos un lab\u0101ku gala zonas izol\u0101ciju reti nov\u0113ro t\u0101das pa\u0161as agr\u012bn\u0101s plaisas identiskas kvalit\u0101tes caurul\u0113m. At\u0161\u0137ir\u012bba nav saist\u012bta ar pa\u0161u sil\u012bcija karb\u012bdu; t\u0101 ir saist\u012bta ar to, cik rei\u017eu caurule tiek pak\u013cauta lielam aksi\u0101lajam temperat\u016bras gradientam, kam\u0113r t\u0101 tiek tur\u0113ta nekust\u012bgi.<\/p>\n<p dir=\"auto\">Praktiskie risin\u0101jumi, kas patie\u0161\u0101m pagarina kalpo\u0161anas laiku, ir dr\u012bz\u0101k meh\u0101niski un procedur\u0101li, nevis saist\u012bti ar materi\u0101la klases mai\u0146u. Pirmk\u0101rt, izvairieties no stingras fiks\u0101cijas tie\u0161i taj\u0101 viet\u0101, kur caurule iziet no karst\u0101s zonas. Neliels elast\u012bgas bl\u012bv\u0113juma posms, atsperes tipa bl\u012bv\u0113jums vai vienk\u0101r\u0161i da\u017eu milimetru ass virziena kust\u012bbas nodro\u0161in\u0101\u0161ana \u013cauj caurulei izplesties un sarukt, neradot lielu stiepes spriedzi. Otrk\u0101rt, ap aukst\u0101 gala p\u0101reju j\u0101uzst\u0101da \u012bss izol\u0101cijas gredzens vai starojuma aizsargs. Samazinot temperat\u016bras kritumu caurules p\u0113d\u0113jos 100\u2013150 mm, gradients samazin\u0101s pietiekami, lai t\u0101 pati mont\u0101\u017eas sist\u0113ma iztur\u0113tu daudz vair\u0101k ciklu. Tre\u0161k\u0101rt, j\u0101kontrol\u0113 sild\u012b\u0161anas un dzes\u0113\u0161anas \u0101trums pa\u0161\u0101 kr\u0101sn\u012b. Pat neliels \u0101truma samazin\u0101jums temperat\u016bras paaugstin\u0101\u0161anas posm\u0101 400\u2013800 \u00b0C diapazon\u0101 samazina maksim\u0101lo spriegumu, k\u0101ds caurulei rodas katr\u0101 cikl\u0101.<\/p>\n<p dir=\"auto\">Sienu biezumam ir liel\u0101ka noz\u012bme, nek\u0101 to atz\u012bst daudzas iepirkuma specifik\u0101cijas. Biez\u0101kas sienas uzlabo meh\u0101nisko iztur\u012bbu un pal\u0113nina virsmas plaisas izplat\u012b\u0161an\u0101s \u0101trumu, ta\u010du t\u0101s ar\u012b palielina siltuma masu un var pasliktin\u0101t temperat\u016bras gradientu, ja aukstais gals ir slikti izol\u0113ts. Liel\u0101kaj\u0101 da\u013c\u0101 termop\u0101ru aizsardz\u012bbas gad\u012bjumu esmu secin\u0101jis, ka vid\u0113ja biezuma siena \u2014 pietiekami bieza, lai iztur\u0113tu boj\u0101jumus, kas rodas apstr\u0101des laik\u0101, bet ne tik smaga, lai uzkr\u0101tu p\u0101rm\u0113r\u012bgu siltumu \u2014 nodro\u0161ina vislab\u0101ko l\u012bdzsvaru, ja mont\u0101\u017ea \u013cauj caurulei nedaudz kust\u0113ties. Uz\u0146\u0113mumi, kas vienk\u0101r\u0161i nosaka augst\u0101ko bl\u012bvumu vai biez\u0101ko pieejamo sienu un p\u0113c tam cauruli stingri nostiprina, joproj\u0101m nomaina caurules \u012bs\u0101 cikl\u0101.<\/p>\n<p dir=\"auto\">Atgriezt\u0101s sil\u012bcija karb\u012bda caurules, kur\u0101m \u0161\u0101di radu\u0161\u0101s boj\u0101jumi, gandr\u012bz vienm\u0113r liecina, ka pl\u012bsums s\u0101kas pie stiprin\u0101juma punkta vai tie\u0161i t\u0101 iek\u0161pus\u0113, turkl\u0101t citviet ir maz paz\u012bmju, kas liecin\u0101tu par pla\u0161u oksid\u0101ciju vai eroziju. Ja t\u0101da pa\u0161a veida caurule tiek uzst\u0101d\u012bta ar nelielu aksi\u0101lo br\u012bv\u012bbu un samazin\u0101tu gala zonas gradientu, pl\u012bsumu ra\u0161an\u0101s interv\u0101ls parasti pagarin\u0101s no da\u017eiem m\u0113ne\u0161iem l\u012bdz pat vair\u0101k nek\u0101 gadam, str\u0101d\u0101jot ar to pa\u0161u darba ciklu. Materi\u0101ls ir sp\u0113j\u012bgs nodro\u0161in\u0101t \u0161\u0101du ilg\u0101ku ekspluat\u0101cijas laiku; ierobe\u017eojo\u0161ais faktors praks\u0113 parasti ir uzst\u0101d\u012b\u0161anas deta\u013cas, kas liek tam katr\u0101 uzsild\u012b\u0161anas un atdzi\u0161anas cikl\u0101 iztur\u0113t nevajadz\u012bgu termisko slodzi.<\/p>","protected":false},"excerpt":{"rendered":"<p>Why Silicon Carbide Tubes Crack at the Cold End After Only a Few Months in Batch Furnaces After twelve years [&hellip;]<\/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":[3],"tags":[],"class_list":["post-404","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/404","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=404"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/404\/revisions"}],"predecessor-version":[{"id":405,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/404\/revisions\/405"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/media?parent=404"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/categories?post=404"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/tags?post=404"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}