NBSiC pasi\u017eymi didele apkrovos laikom\u0105ja galia esant auk\u0161tai temperat\u016brai, taip pat yra atsparus r\u016bg\u0161tims, i\u0161lydytoms druskoms ir halogenams. Be to, \u0161\u012f ma\u017eos mas\u0117s gamin\u012f galima formuoti \u012f sud\u0117tingas formas ir \u012fvairiais b\u016bdais pakeisti metalines dalis.<\/p>\n
Med\u017eiaga labai atspari trapiam \u012ftr\u016bkimui ir sm\u016bginiam d\u0117v\u0117jimuisi. Be to, guma yra atsparesn\u0117 abrazyviniam dilimui nei plienas bet kokio tipo dirvo\u017eemyje.<\/p>\n
NBSiC keramika pasi\u017eymi i\u0161skirtiniu mechaniniu tvirtumu, tinkamu naudoti abrazyvin\u0117je aplinkoje, taip pat yra chemi\u0161kai inerti\u0161ka ir atspari r\u016bg\u0161tims. Be to, \u0161i ugniai atspari med\u017eiaga pasi\u017eymi puikiu \u0161iluminiu stabilumu, t. y. ji gali atlaikyti auk\u0161t\u0105 temperat\u016br\u0105, nesutr\u016bkin\u0117dama ir nesuirsdama, tod\u0117l tinka termoelementams apsaugoti nuo at\u0161iaurios aplinkos arba krosni\u0173 i\u0161klotin\u0117ms gaminti.<\/p>\n
Stiprum\u0105 lemia gr\u016bdeli\u0173 dyd\u017eio pasiskirstymas ir silicio nitrido daleli\u0173 buvimas tarp silicio karbido gr\u016bdeli\u0173. Did\u0117jant gr\u016bdeli\u0173 dyd\u017eiui, ma\u017e\u0117ja tribologinis atsparumas dilimui. NBSiC silicio nitride tarp dideli\u0173 gr\u016bdeli\u0173 susidaro smulki\u0173 por\u0173 strukt\u016bros, kad sutvirtinimo faz\u0117 gal\u0117t\u0173 i\u0161 naujo atakuoti dilinamus pavir\u0161ius ir suma\u017eint\u0173 atskir\u0173 gr\u016bdeli\u0173 apkrov\u0105.<\/p>\n
NBSiC galima formuoti sud\u0117ting\u0173 form\u0173, naudojant Blasch proces\u0105, kad j\u012f b\u016bt\u0173 galima naudoti ugniai atsparioms med\u017eiagoms, nes jis lengvai formuojamas. Formuojant komponentus, jo tikslumas siekia iki keli\u0173 mikron\u0173. Be to, NBSiC pasi\u017eymi i\u0161skirtiniu atsparumu dilimui ekstremaliose temperat\u016brose, taip pat dilimui nuo dirvo\u017eemio daleli\u0173, pranokdamas net special\u0173 plien\u0105, sukurt\u0105 specialiai darbui su dirvo\u017eemiu; dilimo bandym\u0173 metu nustatyta, kad vidutinio intensyvumo dirvo\u017eemio s\u0105lygomis dilimas yra devynis kartus ma\u017eesnis, o sunkaus dirvo\u017eemio s\u0105lygomis - iki 1,2 karto ma\u017eesnis, palyginti su plieno dilimo bandymais.<\/p>\n
Nitridais suri\u0161tas silicio karbidas yra pa\u017eangi ugniai atspari med\u017eiaga, pasi\u017eyminti puikiomis kietumo, atsparumo dilimui ir stiprumo savyb\u0117mis. Ji gali atlaikyti ekstremalias temperat\u016bras, i\u0161likdama itin stabili, pasi\u017eymi ribotu linijiniu pl\u0117timosi ir susitraukimo grei\u010diu, taip pat atsparumo terminiam sm\u016bgiui savyb\u0117mis. Nitridais suri\u0161t\u0105 silicio karbid\u0105 da\u017enai galima pamatyti naudojam\u0105 gele\u017eies gamybos auk\u0161takrosn\u0117se (ypa\u010d apatin\u0117se kamino dalyse, pilve ir bose), keramikos gamyboje ir kitose pramon\u0117s srityse.<\/p>\n
Gaminant nitridacijos b\u016bdu, silicio karbido (SiC gr\u016bdeliai ir metalinio silicio milteliai) sumai\u0161omi ir degami auk\u0161toje temperat\u016broje azoto turtingoje aplinkoje, kad reakcijos metu susiri\u0161\u0119 silicio karbido gr\u016bdeliai tapt\u0173 tankiomis keramin\u0117mis med\u017eiagomis, turin\u010diomis stiprius ry\u0161ius, pana\u0161ius \u012f keramikos gamyboje naudojam\u0105 plien\u0105.<\/p>\n
Nitridais suri\u0161to silicio karbido tyrimai parod\u0117, kad jis efektyviau nei plienas ma\u017eina abrazyvin\u012f dilim\u0105 \u012fvairiomis dirvos s\u0105lygomis, lyginant su plieno, boro plieno ir C+ Cr+Nb kalad\u0117li\u0173 suvirinimo si\u016bli\u0173 efektyvumu \u012fvairiose srityse. Be to, nustatyta, kad gr\u016bd\u0117tumo pasiskirstymas turi tiesiogin\u0117s \u012ftakos \u0161ios med\u017eiagos atsparumui dilimui ir atsparumui dilimui.<\/p>\n
Ma\u017e\u0117jant nitridais sujungto silicio karbido gr\u016bdeli\u0173 dyd\u017eiui, did\u0117ja jo atsparumas dilimui ir jis tampa idealia med\u017eiaga darbin\u0117s dirvos mas\u0117s detal\u0117ms gaminti.<\/p>\n
Nitridais suri\u0161tas silicio karbidas pasi\u017eymi puikiu stabilumu, mechaniniu atsparumu ir atsparumu l\u016b\u017eiams esant auk\u0161tesnei nei 1375 laipsni\u0173 C temperat\u016brai (silicio lydymosi temperat\u016bra). NBSIC keramikai gaminti \"Silcarb\" naudoja pa\u017eang\u0173 gamybos proces\u0105, vadinam\u0105 slydimo liejimu ir (arba) presavimu, po kurio deginimas vyksta deguonies kontroliuojamoje aplinkoje, kad b\u016bt\u0173 pasiekta maksimali galima eksploatavimo temperat\u016bra. Su nitridais suri\u0161tas silicio karbidas naudojamas \u012fvairiose pramon\u0117s srityse, \u012fskaitant aliuminio lydymo katil\u0173 krosni\u0173 bald\u0173 \u0161onines sieneles arba auk\u0161takrosni\u0173 apatinius kaminus.<\/p>\n
\u0160i med\u017eiaga pasi\u017eymi puikiu atsparumu korozijai \u012fvairiose aplinkose - nuo sauso oro iki i\u0161lydyt\u0173 drusk\u0173 ir metal\u0173, taip pat sud\u0117tingose aplinkose, pavyzd\u017eiui, angli\u0173 pelen\u0173 ir \u0161lak\u0173. Tam tikrais atvejais su nitridais suri\u0161tas silicio karbidas netgi gal\u0117t\u0173 pakeisti plien\u0105.<\/p>\n
Su nitridais suri\u0161tas silicio karbidas pasi\u017eymi \u012fsp\u016bdingu atsparumu dilimui abrazyvin\u0117se dirvos s\u0105lygose. Tyrimais \u012frodyta, kad jis yra iki devyni\u0173 kart\u0173 atsparesnis u\u017e special\u0173 plien\u0105, naudojam\u0105 dirvos apdirbimui, ir daugiau nei du kartus atsparesnis u\u017e boro turint\u012f plien\u0105, naudojam\u0105 38GSA plieno trinkeli\u0173 suvirinimui. Na\u0161umas lengvo dirvo\u017eemio s\u0105lygomis da\u017enai pranokdavo vidutinio ir sunkaus dirvo\u017eemio s\u0105lygas; ypa\u010d naudingas lengvo, palyginti su vidutinio sunkumo s\u0105lygomis.<\/p>\n
Nitridais suri\u0161tas silicio karbidas da\u017enai naudojamas toms reikm\u0117ms, kurioms reikia stiprumo, tvirtumo ir \u0161iluminio stabilumo. \u0160i\u0105 med\u017eiag\u0105 d\u0117l atsparumo dilimui da\u017enai galima rasti dylan\u010diose detal\u0117se, guoliuose ir antgaliuose; be to, d\u0117l puiki\u0173 eksploatacini\u0173 savybi\u0173 auk\u0161toje temperat\u016broje ji da\u017enai naudojama aviacijos ir automobili\u0173 pramon\u0117je, \u012fskaitant duj\u0173 turbin\u0173 komponentus, varikli\u0173 dalis ir \u0161ilumokai\u010dius.<\/p>\n
Jungiamojoje faz\u0117je esantis nitridas apsaugo nuo korozijos, kuri\u0105 sukelia kar\u0161tos dujos, i\u0161lydytos druskos ir metalai. Med\u017eiagos da\u017enai papildomai padengiamos silicio dioksidu, kad dar labiau padid\u0117t\u0173 j\u0173 atsparumas korozijai, kartu apsaugant silicio karbid\u0105 nuo erozijos ir pagerinant bendr\u0105 atsparum\u0105 korozijai. Nitridas taip pat prisideda prie atsparumo \u0161iluminiam sm\u016bgiui, tod\u0117l jas galima veiksmingai naudoti toms reikm\u0117ms, kurioms b\u016bdingi staig\u016bs temperat\u016bros poky\u010diai.<\/p>\n
Su azotu suri\u0161to silicio karbido (NBC) ugniai atsparios med\u017eiagos da\u017enai naudojamos sunkiomis eksploatavimo s\u0105lygomis vietoj lydini\u0173 ir kit\u0173 form\u0173 ugniai atspari\u0173 med\u017eiag\u0173, pvz., legiruot\u0173 med\u017eiag\u0173. Da\u017eniausiai pasitaikantys pavyzd\u017eiai - ciklon\u0173 \u012fd\u0117klai mineralini\u0173 med\u017eiag\u0173 perdirbimo gamyklose, taip pat siurbli\u0173 komponentai, vo\u017etuv\u0173 \u012fd\u0117klai, antgaliai ir purk\u0161tukai, pagaminti i\u0161 liejam\u0173 ugniai atspari\u0173 med\u017eiag\u0173, kuri\u0173 sud\u0117tyje yra NBC.<\/p>\n
Su azotu suri\u0161tos silicio karbido plytos pla\u010diai naudojamos plieno ir spalvotosios metalurgijos krosnyse kaip aliuminio lydymo katil\u0173 \u0161onin\u0117s sienel\u0117s ir apatiniai kaminai, auk\u0161takrosn\u0117s, krosni\u0173 baldai ir auk\u0161takrosn\u0117s. Jos pasi\u017eymi puikiu atsparumu sm\u016bgiams, galimybe lengvai formuoti sud\u0117tingas formas ir i\u0161skirtiniu atsparumu dilimui.<\/p>","protected":false},"excerpt":{"rendered":"
NBSiC boasts high load carrying capacities at elevated temperatures, as well as being resistant to acids, molten salts and halogens. Furthermore, this low mass product can be formed into complex shapes to replace metal parts in various ways. Material features excellent resistance to brittle cracking and impact wear. Furthermore, rubber has superior abrasive wear resistance […]<\/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-108","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts\/108","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=108"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts\/108\/revisions"}],"predecessor-version":[{"id":109,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/posts\/108\/revisions\/109"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/media?parent=108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/categories?post=108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lt\/wp-json\/wp\/v2\/tags?post=108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}