Nitridais suri\u0161tas silicio karbidas (NBSIC) pasi\u017eymi i\u0161skirtin\u0117mis mechanin\u0117mis, termin\u0117mis ir chemin\u0117mis savyb\u0117mis. \u012evairiais formavimo b\u016bdais j\u012f galima suformuoti \u012f daugyb\u0119 form\u0173 ir dyd\u017ei\u0173.<\/p>\n
Tyrimai parod\u0117, kad NBSIC pasi\u017eymi geresniu atsparumu dilimui, palyginti su da\u017eniausiai dirvo\u017eemio darbin\u0117se dalyse naudojamais plieno tipais.<\/p>\n
Nitridais suri\u0161tas silicio karbidas pasi\u017eymi puikiomis mechanin\u0117mis savyb\u0117mis, tokiomis kaip stiprumas, atsparumas sm\u016bgiams, atsparumas auk\u0161tai temperat\u016brai ir dilimui. Jis pasi\u017eymi viena did\u017eiausi\u0173 kietumo ver\u010di\u0173 tarp in\u017einerini\u0173 med\u017eiag\u0173 ir vienu ma\u017eiausi\u0173 trinties koeficient\u0173 - tai padeda i\u0161vengti kiet\u0173 daleli\u0173 ar su juo besilie\u010dian\u010di\u0173 pavir\u0161i\u0173 dilimo.<\/p>\n
\"Silcarb\" gamina plat\u0173 NBSIC keramikos form\u0173, dyd\u017ei\u0173 ir profili\u0173 asortiment\u0105, kuris tinka \u012fvairioms reikm\u0117ms, pavyzd\u017eiui, panardinamiesiems vamzd\u017ei\u0173 \u0161ildytuvams, krosni\u0173 \u012fd\u0117klams ir liejamoms ugniai atsparioms med\u017eiagoms, pavyzd\u017eiui, krosni\u0173 \u012fd\u0117klams arba liejamoms ugniai atsparioms med\u017eiagoms.<\/p>\n
Silicio karbido chemin\u0117 sud\u0117tis lemia, kad jis itin stabilus esant auk\u0161tai temperat\u016brai, o jo stiprumas i\u0161lieka beveik nepakit\u0119s esant didel\u0117ms apkrovoms; d\u0117l to NBSIC yra ypa\u010d patikimas vertinant keramines ugniai atsparias med\u017eiagas at\u0161iaurioje aplinkoje. Be to, \u0161i med\u017eiaga pasi\u017eymi i\u0161skirtiniu atsparumu r\u016bg\u0161tiniams ir baziniams tirpalams, pavyzd\u017eiui, kar\u0161toms dujoms, i\u0161lydytoms druskoms, metalams - labiau nei oksidais suri\u0161ti silicio karbido gaminiai!<\/p>\n
Reakcijos b\u016bdu suri\u0161tas silicio karbidas (NB SiC) yra pa\u017eangi ugniai atspari med\u017eiaga, pasi\u017eyminti puikiomis termin\u0117mis ir chemin\u0117mis savyb\u0117mis. Ji pasi\u017eymi dideliu stiprumu esant auk\u0161tai temperat\u016brai ir gali b\u016bti formuojama beveik tinklin\u0117mis formomis, skirtomis beveik tinkliniam liejimui, pavyzd\u017eiui, i\u0161 \u0161ios med\u017eiagos paprastai gaminami ciklon\u0173 \u012fd\u0117klai mineral\u0173 ir anglies gamyklose, taip pat korozijai atspar\u016bs komponentai, esantys pramoninio perdirbimo \u012frangoje.<\/p>\n
Auk\u0161toje temperat\u016broje silicio milteliams reaguojant su azotu, susidaro nitridais suri\u0161ta strukt\u016bra, kuri sujungia SiC gr\u016bdelius ir pagerina j\u0173 mechanines savybes: 1400 laipsni\u0173 temperat\u016broje padid\u0117ja tempimo stipris 50%, taip pat atsiranda puikios atsparumo nuovargiui savyb\u0117s.<\/p>\n
D\u0117l puikaus atsparumo oksidacijai ir atsparumo terminiams sm\u016bgiams NB SiC yra ideali med\u017eiaga didel\u0117s apkrovos krosni\u0173 baldams, \u012fskaitant atliek\u0173 deginimo ir aliuminio redukcijos element\u0173 krosnis. Be to, jis lengvai atlaiko vibracij\u0105 ir dilim\u0105, taip pat pasi\u017eymi ma\u017eu linijinio pl\u0117timosi koeficientu, kuris pagerina mechanin\u012f atsparum\u0105 \u0161iluminio ciklo metu.<\/p>\n
Silicio karbidas yra chemi\u0161kai inerti\u0161kas ir atsparus daugumai chemini\u0173 med\u017eiag\u0173, \u012fskaitant r\u016bg\u0161tis. Be to, d\u0117l savo \u0161iluminio stabilumo jis gali atlaikyti auk\u0161t\u0105 temperat\u016br\u0105, nesugadindamas ir neprarasdamas mechanini\u0173 savybi\u0173.<\/p>\n
Nitridais suri\u0161t\u0105 silicio karbid\u0105 galima formuoti \u012f sud\u0117tingas formas, tod\u0117l jis yra puiki med\u017eiaga, naudojama tais atvejais, kai labai svarbus konstrukcinis tvirtumas. Didel\u0117 tempimo j\u0117ga ir puiki lenkimo j\u0117ga apsaugo nuo lenkimo ar i\u0161linkimo, kai veikia skersiniai \u012ftempiai.<\/p>\n
Su nitridais suri\u0161tas silicio karbidas (NB SiC) gali b\u016bti brangesnis nei jo neoksidin\u0117s in\u017einerin\u0117s keramikos analogai, pavyzd\u017eiui, HP SiC ir SSiC, ta\u010diau jis daug tvirtesnis. Be to, jo atsparumas sm\u016bgiams ir dilimui ypa\u010d vertingas dirbant dirvo\u017eemio aplinkoje; atlikus bandymus paai\u0161k\u0117jo, kad lengvo dirvo\u017eemio su abrazyvin\u0117mis dalel\u0117mis s\u0105lygomis jis yra daugiau kaip 1,2 karto tvirtesnis nei plienas ar trinkeli\u0173 suvirinimo si\u016bl\u0117, daugiau kaip 1,5 karto tvirtesnis vidutinio sunkumo dirvo\u017eemyje ir beveik a\u0161tuonis kartus tvirtesnis nei plienas ir trinkeli\u0173 suvirinimo si\u016bl\u0117 bandant sunkiomis dirvo\u017eemio s\u0105lygomis.<\/p>\n
Nitridais suri\u0161tas silicio karbidas gerai \u017einomas d\u0117l savo ypatingo atsparumo dilimui ir cheminio inerti\u0161kumo. Jis paprastai naudojamas \u0161achtin\u0117se krosnyse variui lydyti, vario \u0161lakui ir aliuminio gamybos procesuose.<\/p>\n
Su nitridais suri\u0161tas silicio karbidas pasi\u017eymi puikiu atsparumu dilimui lengvo grunto s\u0105lygomis ir gerokai lenkia plieno atsparum\u0105. Tai ypa\u010d akivaizdu F-61 trinkeli\u0173 suvirinimo si\u016bl\u0117je, kurioje niobio kiekis yra didesnis nei postmartensitiniame B27 pliene ir kurioje yra smulki\u0173 martensito gr\u016bdeli\u0173, kiet\u0117jan\u010di\u0173 martensite, atleid\u017eiamojo martensito viduje, o tai \u012frodo geresnis atsparumas dilimui nei plieno ir F-61 trinkeli\u0173 suvirinimo si\u016bl\u0117s lengvo dirvo\u017eemio s\u0105lygomis.<\/p>\n
NB SiC pasi\u017eymi puikiu atsparumu \u0161iluminiam sm\u016bgiui, t. y. gali atlaikyti staigius temperat\u016bros poky\u010dius be \u012ftr\u016bkim\u0173 ar l\u016b\u017ei\u0173. D\u0117l to tai puiki med\u017eiaga, kuri\u0105 galima naudoti intensyviomis eksploatavimo s\u0105lygomis, kai \u012fprastomis temperat\u016brin\u0117mis apkrovos s\u0105lygomis kita keramika deformuojasi arba \u012ftr\u016bksta. Be to, d\u0117l savo atsparumo skersin\u0117ms apkrovoms NB SiC yra puiki med\u017eiaga, kuri\u0105 galima naudoti tunelin\u0117se krosnyse, mar\u0161rutin\u0117se krosnyse ir kitose pramonin\u0117se krosnyse.<\/p>","protected":false},"excerpt":{"rendered":"
Nitride-bonded silicon carbide (NBSIC) offers outstanding mechanical, thermal and chemical properties. It can be formed into numerous shapes and sizes by various forming methods. Studies have demonstrated that NBSIC exhibits superior wear resistance compared to commonly used steel types in soil working parts. Mechanical Properties Nitride-bonded silicon carbide exhibits superior mechanical properties such as strength, […]<\/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-170","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts\/170","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=170"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts\/170\/revisions"}],"predecessor-version":[{"id":171,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts\/170\/revisions\/171"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/media?parent=170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/categories?post=170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/tags?post=170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}