Reakcijos b\u016bdu suri\u0161tas silicio karbidas yra itin atspari keramin\u0117 med\u017eiaga, pasi\u017eyminti i\u0161skirtiniu atsparumu sm\u016bgiams ir d\u0117v\u0117jimuisi, atsparumu terminiams sm\u016bgiams ir cheminiam poveikiui.<\/p>\n
Akyt\u0173 SiC ir anglies daleli\u0173 preparatai, infiltruoti skystu arba dujiniu siliciu, d\u0117l chemin\u0117s silicio ir anglies reakcijos savaime susijungia. Siliciui reaguojant su anglimi, susidaro papildomos silicio karbido dalel\u0117s, kurios dar labiau suri\u0161a pradines daleles.<\/p>\n
Reakcijos b\u016bdu suri\u0161tas silicio karbidas (RBSiC) yra itin patvari keramin\u0117 med\u017eiaga, pasi\u017eyminti i\u0161skirtiniu atsparumu chemin\u0117ms med\u017eiagoms, atsparumu sm\u016bgiams, dilimui ir terminiam sm\u016bgiui. Gaminamas infiltruojant i\u0161lydyt\u0105 silic\u012f \u012f akytas anglies arba grafito ruo\u0161inius, kur jis reaguoja su anglimi ir susidaro SiC, tod\u0117l d\u0117l savo i\u0161skirtinio stiprumo ir didelio plasti\u0161kumo RBSiC idealiai tinka netoli grynojo formavimo procesams, tokiems kaip presavimas, \u012fpur\u0161kimas ir i\u0161spaudimas, tod\u0117l galima formuoti dideles detales su ma\u017eais nuokrypiais.<\/p>\n
D\u0117l ma\u017eesnio RB SiC kietumo, palyginti su sukepintu silicio karbidu, j\u012f lengviau formuoti, tod\u0117l i\u0161 \u0161ios med\u017eiagos pagamintus sud\u0117tingus in\u017einerinius elementus lengviau nei bet kada anks\u010diau formuoti ir projektuoti taip, kad jie apsaugot\u0173 \u012frang\u0105 nuo dilimo ir sm\u016bgi\u0173, taip padidinant ilgaam\u017ei\u0161kum\u0105 ir saugum\u0105. Be to, d\u0117l atsparumo terminiams sm\u016bgiams ir geb\u0117jimo greitai atsistatyti po staigi\u0173 temperat\u016bros poky\u010di\u0173 \u0161i med\u017eiaga puikiai tinka naudoti elektrin\u0117se, plieno gamyklose, kalnakasybos \u012fmon\u0117se ir visur, kur \u012franga turi veikti esant ekstremalioms temperat\u016broms.<\/p>\n
RBSiC ne tik pasi\u017eymi ypatingu tvirtumu, bet ir i\u0161skirtiniu matmen\u0173 stabilumu bei atsparumu korozijai. Be to, RBSiC pasi\u017eymi itin ma\u017eu \u0161iluminio pl\u0117timosi koeficientu ir i\u0161laiko savo mechanines savybes net auk\u0161toje temperat\u016broje, tod\u0117l tinka tuneli\u0173 krosnims, hidraulinio skaldymo siurbliams ir kitoms pramonin\u0117ms reikm\u0117ms. Be to, \u0161i\u0105 lengv\u0105 med\u017eiag\u0105 galima lengvai formuoti \u012f didesnius komponentus, skirtus tokiems taikymams, kaip mechaniniai sandarikliai ir srauto reguliavimo droseliai kasybos darbuose.<\/p>\n
Reakcijos b\u016bdu suri\u0161ta silicio karbido keramika gali atlaikyti iki 1350 laipsni\u0173 C temperat\u016br\u0105 be dideli\u0173 matmen\u0173 poky\u010di\u0173 ir pasi\u017eymi puikiomis cheminio atsparumo savyb\u0117mis, tod\u0117l puikiai tinka kalnakasybos pramon\u0117je, pvz., ciklonams, srauto reguliavimo droseliams ir dideliems dylantiems komponentams.<\/p>\n
Reaktyvin\u0117 lydalo infiltracija (RMI) \u012f anglies ruo\u0161inius - tai j\u0173 infiltracija skystu siliciu taikant reaktyvi\u0105j\u0105 lydalo infiltracij\u0105 (RMI). Vykstant RMI procesui, skystas silicis kapiliarine j\u0117ga prasiskverbia \u012f poras ir reaguoja su amorfine anglimi, sudarydamas b-SiC. Likusios nesureagavusios anglies dalel\u0117s ir nesureagavusi anglis i\u0161gryninamos daugiafaz\u0117s anglies b\u016bdu, taip dar labiau i\u0161gryninant por\u0117tum\u0105 ir suma\u017einant sal\u0173 susidarym\u0105 RB-SiC, kaip tinklinio formavimo dal\u012f, pasi\u017eymin\u010di\u0105 puikiomis matmen\u0173 tolerancijomis.<\/p>\n
Reakcijos b\u016bdu suri\u0161tas silicio karbidas lenkia sukepint\u0105 silicio karbid\u0105, nes pasi\u017eymi didesniu \u0161ilumos laidumu ir ma\u017eesniu pl\u0117timosi koeficientu auk\u0161toje temperat\u016broje, tod\u0117l labiau tinka naudoti ten, kur vyrauja vibracija, sm\u016bgiai, dilimas ar \u0161iluminiai sm\u016bgiai. Tod\u0117l reakcijos b\u016bdu suri\u0161tas silicio karbidas yra ideali med\u017eiaga tokiose aplinkose kaip pramonin\u0117s stakl\u0117s.<\/p>\n
Reakcijos b\u016bdu suri\u0161tas silicio karbidas pasi\u017eymi ypatingu atsparumu auk\u0161tatemperat\u016brinei korozijai bei pasyviajai ir aktyviajai oksidacijai, tod\u0117l d\u0117l savo matmen\u0173 stabilumo, didelio stiprumo, atsparumo chemin\u0117ms med\u017eiagoms ir dilimui jis tinka didel\u0117s apimties komponent\u0173 gamybai. J\u012f galima lengvai formuoti \u012f \u012fvairias formas ir dyd\u017eius. D\u0117l savo formuojamumo jis ypa\u010d tinka dideliems, sud\u0117tingiems komponentams gaminti.<\/p>\n
Reakcijos b\u016bdu suri\u0161tas silicio karbidas (RB SiC) pasi\u017eymi puikiu atsparumu terminiams sm\u016bgiams, tod\u0117l tinka naudoti ten, kur da\u017enai b\u016bna ekstremalios temperat\u016bros. Taip yra d\u0117l ma\u017eo \u0161iluminio pl\u0117timosi koeficiento, t. y. jis labai nei\u0161siple\u010dia ir nesusitraukia veikiamas staigi\u0173 temperat\u016bros poky\u010di\u0173. Be to, jis pasi\u017eymi viena did\u017eiausi\u0173 kietumo ver\u010di\u0173 tarp in\u017einerini\u0173 med\u017eiag\u0173, tod\u0117l RB SiC yra ne\u012ftik\u0117tinai tvirtas ir atsparus.<\/p>\n
RB SiC gerai atlaiko sm\u016bgius, tod\u0117l yra puiki med\u017eiaga mechaniniams sandarikliams, vamzd\u017ei\u0173 \u012fd\u0117klams, mechaniniams komponentams, srauto reguliavimo droseliams ir didesniems d\u0117v\u0117jimosi komponentams kasybos pramon\u0117je ir sunkiasvor\u0117se ma\u0161inose. Gaminamas \u012fpur\u0161kiant i\u0161lydyt\u0105 silic\u012f \u012f akytas anglies arba grafito ruo\u0161inius ir reaguojant su anglimi susidaro silicio karbidas; formos ir dyd\u017eiai gali b\u016bti pritaikomi atsi\u017evelgiant \u012f konkre\u010dius taikymo reikalavimus.<\/p>\n
Ji ir kiti atliko RB silicio karbido bandymus, kad \u012fvertint\u0173 jo atsparum\u0105 \u0161iluminiam sm\u016bgiui, \u012fvertindami jo stipr\u012f keturi\u0173 ta\u0161k\u0173 lenkimo metu, kai temperat\u016bra pakyla nuo kambario temperat\u016bros iki 1 000 laipsni\u0173 Celsijaus. J\u0173 i\u0161vados parod\u0117, kad terminis \u012ftempimas suk\u0117l\u0117 gedimus pluo\u0161tine med\u017eiaga suri\u0161toje keramikoje, kai \u012ftr\u016bkimai plinta tarp pluo\u0161tini\u0173 element\u0173 ir per j\u0173 s\u0105sajas; j\u0173 reakcinio sukepinimo metu naudoti anglies \u0161altiniai, pavyzd\u017eiui, suod\u017eiai arba stambiagr\u016bd\u0117 mikrosferin\u0117 grafituota anglis, l\u0117m\u0117 med\u017eiagos elgsen\u0105.<\/p>\n
Reakcijos b\u016bdu suri\u0161tas silicio karbidas (RB SiC) yra didelio tankio keramin\u0117 med\u017eiaga, pasi\u017eyminti puikiomis savyb\u0117mis, \u012fskaitant r\u016bg\u0161\u010di\u0173, \u0161arm\u0173 ir tirpikli\u0173 atsparum\u0105 chemin\u0117ms med\u017eiagoms ir korozijos pa\u017eeidimams. D\u0117l ma\u017eo pl\u0117timosi koeficiento j\u0105 galima pritaikyti \u012fvairioms formoms ir dyd\u017eiams, \u012fskaitant mechaninius sandariklius, srauto reguliavimo droselines sklendes, siurblius ir didelius d\u0117vimuosius komponentus, kurie da\u017eniausiai naudojami kasybos ciklonuose.<\/p>\n
Silicio karbidas, pagamintas skystu ar dujiniu siliciu infiltruojant akytas anglies ar grafito formas, yra tvirtesnis ir pasi\u017eymi geresniu \u0161iluminiu stabilumu nei sukepintas. D\u0117l to \u0161i forma idealiai tinka toms reikm\u0117ms, kurioms reikia ma\u017eesnio kietumo, bet didesnio temperat\u016brinio stabilumo.<\/p>\n
RB SiC keramikos korozijos \u017eala yra minimali, ji labai atspari oksidacijai, druskos r\u016bg\u0161\u010diai, sieros r\u016bg\u0161\u010diai, vandenilio chlorido r\u016bg\u0161\u010diai ir stipriems \u0161armams. Be to, ma\u017eas pralaidumas padeda pasiekti i\u0161skirtin\u012f atsparum\u0105 chemin\u0117ms med\u017eiagoms.<\/p>\n
Sukepintas silicio karbidas paprastai yra brangesnis nei RB SiC, ta\u010diau jis gali b\u016bti naudingas tais atvejais, kai priimtinas \u017eemas kietumo lygis, bet reikia geresnio terminio stabilumo. RB SiC u\u017etikrina didesn\u012f gamybos lankstum\u0105 ir yra ekonomi\u0161kesnis nei sukepintas silicio karbidas.<\/p>","protected":false},"excerpt":{"rendered":"
Reaction-bonded silicon carbide is an ultra-resilient ceramic material that offers exceptional strength against impact and wear, thermal shock resistance, and chemical attack. Formulations of porous SiC and carbon particles, when infiltrated with liquid or gaseous silicon, become self-bonding due to chemical reaction between silicon and carbon. Silicon reacts with carbon to form additional silicon carbide […]<\/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-331","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts\/331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/comments?post=331"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts\/331\/revisions"}],"predecessor-version":[{"id":332,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts\/331\/revisions\/332"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/media?parent=331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/categories?post=331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/tags?post=331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}