Ar nitr\u012bdu saist\u012btais sil\u012bcija karb\u012bds (NbSC) ir augsttemperat\u016bras keramikas materi\u0101ls, ko pla\u0161i izmanto da\u017e\u0101dos lietojumos. Lai to ra\u017eotu, paaugstin\u0101t\u0101 temperat\u016br\u0101 sajauc sil\u012bcija pulveri un g\u0101zveida sl\u0101pekli, k\u0101 sa\u0137epin\u0101\u0161anas pal\u012bgvielu izmantojot magniju.<\/p>\n
Tika atkl\u0101ts, ka nitr\u012bdu savienotajam sil\u012bcija karb\u012bdam ir daudz liel\u0101ka nodilumiztur\u012bba nek\u0101 t\u0113raudam viegl\u0101 augsn\u0113 ar irden\u0101m smilts da\u013ci\u0146\u0101m un vair\u0101k nek\u0101 se\u0161as reizes liel\u0101ka smag\u0101 augsn\u0113; tom\u0113r t\u0101 nodilumiztur\u012bba at\u0161\u0137\u012br\u0101s atkar\u012bb\u0101 no augsnes veida, kur\u0101 tas tika ievietots.<\/p>\n
Ar nitr\u012bdu savienotais sil\u012bcija karb\u012bds nodro\u0161ina izcilu iztur\u012bbu pret termiskiem triecieniem un var iztur\u0113t p\u0113k\u0161\u0146as temperat\u016bras mai\u0146as bez plais\u0101m vai l\u016bzumiem. Turkl\u0101t t\u0101 virsma ir notur\u012bga pret \u0137\u012bmiskiem uzbrukumiem un oksid\u0101ciju, nodro\u0161inot maksim\u0101lu aizsardz\u012bbu pret degrad\u0101ciju.<\/p>\n
NB SiC stipr\u0101 puse ir t\u0101 ra\u017eo\u0161anas process - nitrid\u0113\u0161ana. Tas ietver sil\u012bcija karb\u012bda graudu un met\u0101lisk\u0101 sil\u012bcija pulvera mais\u012bjuma ielie\u0161anu\/pres\u0113\u0161anu\/iespie\u0161anu injekcijas veidn\u0113 un kars\u0113\u0161anu sl\u0101pekli saturo\u0161\u0101 atmosf\u0113r\u0101, l\u012bdz viss met\u0101liskais sil\u012bcija pulveris p\u0101rv\u0113r\u0161as keramikas bag\u0101t\u0101 f\u0101z\u0113, kas sil\u012bcija karb\u012bda graudus savieno vien\u0101 ciet\u0101 mas\u0101, radot necaurlaid\u012bgu keramikas f\u0101zi un pretsadrumstalotu un nesadal\u0101mu produktu, kas ir ide\u0101li piem\u0113rots \u0137ie\u0123e\u013cu ra\u017eo\u0161anai, kurus izmantos kr\u0101sn\u012bs un kr\u0101sn\u012bs.<\/p>\n
Ar nitr\u012bdu saist\u012btais sil\u012bcija karb\u012bds iev\u0113rojami p\u0101rsp\u0113j ar reakciju infiltr\u0113to sil\u012bcija karb\u012bdu. Reakcijas infiltr\u0113tajam materi\u0101lam parasti ir 5 - 15% poras, un to vajadz\u0113tu izmantot tikai zemas spriedzes lietojumos bez tie\u0161as kr\u0101saino met\u0101lu vai izkaus\u0113tu s\u0101r\u0146u iedarb\u012bbas. Ar nitr\u012bdu saist\u012btais sil\u012bcija karb\u012bds ar\u012b p\u0101rsp\u0113j karst\u0101s pres\u0113\u0161anas un karst\u0101s izostatisk\u0101s pres\u0113\u0161anas \u0161\u0137irnes, kur\u0101m ab\u0101m ir liel\u0101ka porain\u012bba, kas ierobe\u017eo izmanto\u0161anu tikai neliel\u0101s \u0123eometrij\u0101s.<\/p>\n
Ar nitr\u012bdu saist\u012btais sil\u012bcija karb\u012bds (NBSC) ir \u0101rk\u0101rt\u012bgi iztur\u012bgs materi\u0101ls ar izcilu nodilumiztur\u012bbu, kura ciet\u012bba ir 1080, kas ir daudz augst\u0101ka nek\u0101 t\u0113rauda ciet\u012bba, kas \u013cauj no t\u0101 izgatavot gandr\u012bz neto formas, kas atveido met\u0101la deta\u013cas. T\u0101d\u0113j\u0101di NBSC ir ide\u0101li piem\u0113rots sakaus\u0113jumu vai citu ugunsiztur\u012bgu materi\u0101lu aizst\u0101\u0161anai smagos ekspluat\u0101cijas apst\u0101k\u013cos, un to var izmantot ar\u012b k\u0101 nodilumiztur\u012bgu materi\u0101lu, piem\u0113ram, ciklonu oder\u0113jumu miner\u0101lu ra\u017eotn\u0113s un og\u013cu sp\u0113kstacij\u0101s, k\u0101 ar\u012b korozijiztur\u012bgu materi\u0101lu \u0137\u012bmiskaj\u0101s ra\u017eotn\u0113s.<\/p>\n
Ar nitr\u012bdu savienotam sil\u012bcija karb\u012bdam piem\u012bt liela triecieniztur\u012bba vieglos augsnes apst\u0101k\u013cos, bet t\u0101 nodilumiztur\u012bba samazin\u0101s smag\u0101kos apst\u0101k\u013cos, jo smil\u0161u graudi\u0146i, kas uzbr\u016bk t\u0101 virsmai, ir br\u012bvi abraz\u012bvi. \u0160\u0101da veida nodilumu bie\u017ei raksturo skr\u0101p\u0113jumi un rievojumi, nevis agres\u012bva erozija, k\u0101da v\u0113rojama t\u0101diem materi\u0101liem k\u0101 XAR 600 t\u0113raudiem vai F-61 polster\u0113juma \u0161uv\u0113m.<\/p>\n
Sinter\u0113tajam sil\u012bcija karb\u012bdam piem\u012bt izcila iztur\u012bba pret termisko triecienu un sl\u012bd\u0113\u0161anu, t\u0101p\u0113c tas ir ide\u0101ls materi\u0101ls izmanto\u0161anai augst\u0101s temperat\u016br\u0101s no 1300-1650oC. Turkl\u0101t t\u0101 unik\u0101l\u0101 meh\u0101nisk\u0101 iztur\u012bba, zemais line\u0101r\u0101s izple\u0161an\u0101s koeficients, lab\u0101 \u0137\u012bmisk\u0101 stabilit\u0101te un viegli apstr\u0101d\u0101jam\u0101 mikrostrukt\u016bra padara \u0161o materi\u0101lu \u013coti \u0113rtu lieto\u0161anai. IPS Ceramics var pieg\u0101d\u0101t sa\u0137epin\u0101tas sil\u012bcija karb\u012bda pl\u0101ksnes, setsteru caurules vai sijas, kas atbilst vis\u0101m j\u016bsu kr\u0101sns m\u0113be\u013cu pras\u012bb\u0101m.<\/p>\n
Ar nitr\u012bdu saist\u012bt\u0101 sil\u012bcija karb\u012bda augst\u0101 meh\u0101nisk\u0101 iztur\u012bba padara to par izcilu materi\u0101lu, kas iztur\u012bgs pret nodilumu. Vieglos augsnes apst\u0101k\u013cos t\u0101 iztur\u012bba ir augst\u0101ka nek\u0101 t\u0101diem t\u0113raudiem k\u0101 bora t\u0113rauds vai F-61 polster\u0113juma \u0161uve, t\u0101p\u0113c tas ir pat iztur\u012bg\u0101ks pret nodilumu nek\u0101 to t\u0113rauda analogi; prec\u012bzs nodiluma ce\u013c\u0161 galu gal\u0101 ir atkar\u012bgs no t\u0101, k\u0101 abraz\u012bv\u0101s da\u013ci\u0146as mijiedarbojas ar berzes virsm\u0101m - br\u012bvi kust\u012bgi smil\u0161u graudi\u0146i var \u0161\u012bs virsmas saskr\u0101p\u0113t, bet cietas da\u013ci\u0146as - \u0161\u0137elt.<\/p>\n
Ar nitr\u012bdu saist\u012btu sil\u012bcija karb\u012bdu ra\u017eo, sl\u0101pek\u013ca atmosf\u0113r\u0101 nitrid\u0113jot veidotu SiC granulu un met\u0101lisk\u0101 sil\u012bcija pulvera \u0137ermeni. \u0160aj\u0101 proces\u0101 met\u0101liskais sil\u012bcijs p\u0101rv\u0113r\u0161as par sil\u012bcija nitr\u012bdu, kas cie\u0161i savienojas ar SiC graudiem, veidojot bl\u012bvu strukt\u016bru.<\/p>\n
Ieg\u016btais materi\u0101ls ir ne tikai iztur\u012bgs pret \u0137\u012bmisko iedarb\u012bbu un koroziju temperat\u016br\u0101 l\u012bdz 1600oC, bet ar\u012b nodro\u0161ina izcilu meh\u0101nisko iztur\u012bbu - \u012bpa\u0161\u012bbas, kas padara NB SiC ide\u0101li piem\u0113rotu t\u0101diem pielietojumiem k\u0101 kr\u0101sns m\u0113beles, vafe\u013cu palikt\u0146u balsti un l\u0101psti\u0146as vai citiem pielietojumiem, kas saist\u012bti ar augstu temperat\u016bru un zemu spiedienu. IPS Ceramics pied\u0101v\u0101 gan atv\u0113rt\u0101s porain\u0101s, gan piln\u012bb\u0101 bl\u012bv\u0101s \u0161\u012b materi\u0101la formas.<\/p>\n
Ar nitr\u012bdu saist\u012btais sil\u012bcija karb\u012bds nav neaizsarg\u0101ts pret \u0137\u012bmisku iedarb\u012bbu, t\u0101p\u0113c tas ir piem\u0113rots lietojumiem, kas saist\u012bti ar agres\u012bv\u0101m \u0137\u012bmisk\u0101m viel\u0101m. Turkl\u0101t tas nodro\u0161ina izcilu iztur\u012bbu pret termiskiem triecieniem.<\/p>\n
Ugunsiztur\u012bg\u0101 keramika ir ide\u0101ls materi\u0101ls, ko izmantot ce\u013cu b\u016bves projektos, kur tiek izmantoti smagie kravas automobi\u013ci, pateicoties t\u0101s izcilaj\u0101m nodilumiztur\u012bbas \u012bpa\u0161\u012bb\u0101m abraz\u012bvas augsnes mas\u0101 un sp\u0113jai iztur\u0113t transportl\u012bdzek\u013ca spiedienu augst\u0101 temperat\u016br\u0101. T\u0101d\u0113j\u0101di tas ir lieliska izv\u0113le bru\u0123a un ce\u013cu seguma kl\u0101\u0161anas darbiem, kur var tikt izmantotas smag\u0101s kravas automa\u0161\u012bnas.<\/p>\n
Tas, k\u0101 nitr\u012bdu savienotais sil\u012bcija karb\u012bds nodilst, ir atkar\u012bgs no abraz\u012bv\u0101s augsnes masas rakstura un graudu lieluma sadal\u012bjuma. Viegla augsne parasti rada br\u012bvus smil\u0161u graudus, kas br\u012bvi p\u0101rvietojas pa t\u0101s virsmu, skr\u0101p\u0113jot berzes virsmas; ja augsnes masa ir smag\u0101ka, abraz\u012bv\u0101 iedarb\u012bba ir maz\u0101ka un notiek mikrop\u013cau\u0161ana, k\u0101 rezult\u0101t\u0101 tiek no\u0146emti visi m\u012bkstie sl\u0101\u0146i (1. att\u0113ls).<\/p>\n
Rea\u0123\u0113jot saist\u012btais sil\u012bcija karb\u012bds (RB SiC) tiek rad\u012bts, ievadot izkaus\u0113tu sil\u012bciju porain\u0101 oglek\u013ca materi\u0101l\u0101, kas iepild\u012bts v\u0113lamaj\u0101 da\u013c\u0101, k\u0101 rezult\u0101t\u0101 tas rea\u0123\u0113 un veidojas k\u0101 SiC. RB SiC ir \u0101rk\u0101rt\u012bgi ciets materi\u0101ls ar izcilu meh\u0101nisko iztur\u012bbu, ko var izgatavot da\u017e\u0101d\u0101s form\u0101s un izm\u0113ros, lai izmantotu k\u0101 meh\u0101niskos bl\u012bv\u0113jumus, gult\u0146us vai pl\u016bsmas kontroles aizb\u012bd\u0146us.<\/p>\n
Ar nitr\u012bdu savienots sil\u012bcija karb\u012bds (NiC) ir \u0101rk\u0101rt\u012bgi iztur\u012bgs keramikas materi\u0101ls, kas sast\u0101v no SiC da\u013ci\u0146\u0101m, kuras sakaus\u0113tas kop\u0101 nitrid\u0113\u0161anas proces\u0101. Ar nitr\u012bdu saist\u012btais SiC ir ide\u0101li piem\u0113rots lietojumiem, kam nepiecie\u0161ama augsta slodzes nestsp\u0113ja un temperat\u016bras iztur\u012bba, piem\u0113ram, smagajiem meh\u0101nismiem.<\/p>\n
NBSiC ir iztur\u012bgs pret sk\u0101bju, izkaus\u0113tu s\u0101\u013cu un halog\u0113nu izrais\u012btu koroziju. Turkl\u0101t \u0161im materi\u0101lam piem\u012bt laba iztur\u012bba pret izded\u017eiem un augsta termisko triecienu iztur\u012bba; turkl\u0101t tas var iztur\u0113t temperat\u016bru l\u012bdz 1650 gr\u0101diem p\u0113c Celsija, vienlaikus saglab\u0101jot izcilas meh\u0101nisk\u0101s \u012bpa\u0161\u012bbas.<\/p>\n
NBSiC korozija ir daudzpak\u0101pju process, ko ietekm\u0113 da\u017e\u0101das sugas, piemais\u012bjumi, sa\u0137epin\u0101\u0161anas pal\u012bgvielas, graudu robe\u017ef\u0101zes, porain\u012bba un virsmas morfolo\u0123ija. Ir zin\u0101ms, ka uz substr\u0101tiem uzkr\u0101tie sakrific\u0113tie oks\u012bdu sl\u0101\u0146i veicina parabolisku reakcijas kin\u0113tiku, kas samazina sk\u0101bek\u013ca dif\u016bzijas \u0101trumu.<\/p>\n
Tika konstat\u0113ts, ka NBSiC nodilumiztur\u012bba ir atkar\u012bga no augsnes masas veida, kam tas tika pak\u013cauts. Vieglai augsnei bija vislab\u0101k\u0101s nodilumiztur\u012bbas \u012bpa\u0161\u012bbas sal\u012bdzin\u0101jum\u0101 ar t\u0113raudu un \u0161uvju polster\u0113jumu, bet vid\u0113ji smagai un smagai augsnei bija vismaz\u0101k\u0101 nodilumiztur\u012bba, ko izrais\u012bja izded\u017eu iespie\u0161an\u0101s, kas laika gait\u0101 izraisa NBSiC m\u012bksto da\u013ci\u0146u atdal\u012b\u0161anos.<\/p>","protected":false},"excerpt":{"rendered":"
Nitride-bonded silicon carbide (NbSC) is a high-temperature ceramic material widely used across a range of applications. To produce it, silicon powder and gaseous nitrogen are mixed at elevated temperatures with the aid of magnesium as a sintering aid. Nitride-bonded silicon carbide was discovered to have much higher wear resistance than steel in light soil with […]<\/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-87","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/posts\/87","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/comments?post=87"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/posts\/87\/revisions"}],"predecessor-version":[{"id":88,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/posts\/87\/revisions\/88"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/media?parent=87"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/categories?post=87"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/tags?post=87"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}