Silisyum karb\u00fcr, etkileyici mekanik ve elektriksel \u00f6zellikleri, \u00f6zellikle de d\u00fc\u015f\u00fck termal genle\u015fme oran\u0131 ve mukavemet \u00f6zellikleri nedeniyle end\u00fcstrilerde giderek daha pop\u00fcler bir malzeme haline gelmektedir. Bu \u00f6zelli\u011fi nedeniyle teleskop aynas\u0131 \u00fcretimi i\u00e7in ideal bir adayd\u0131r.<\/p>\n
Yeniden kristalle\u015ftirilmi\u015f silisyum karb\u00fcr \u00fcretmek i\u00e7in karbotermik indirgemeden olu\u015fan bir y\u00f6ntem sunulmu\u015ftur. Bu i\u015flem, kal\u0131pla \u015fekillendirilmi\u015f bir g\u00f6vdeyi iki veya daha fazla saat i\u00e7inde 2000 santigrat dereceye kadar \u0131s\u0131t\u0131r.<\/p>\n
Yeniden kristalize edilmi\u015f silisyum karb\u00fcr (RSiC), havac\u0131l\u0131k ve uzay m\u00fchendisli\u011fi gibi y\u00fcksek performansl\u0131 uygulamalarda kullan\u0131lan geli\u015fmi\u015f bir teknik seramiktir. RSiC, a\u015f\u0131r\u0131 son kullan\u0131m s\u0131cakl\u0131klar\u0131nda ola\u011fan\u00fcst\u00fc kimyasal ve mekanik \u00f6zelliklere sahiptir; mikro yap\u0131s\u0131, y\u00fcksek mukavemet, tokluk, a\u015f\u0131nma direnci ve d\u00fc\u015f\u00fck termal genle\u015fme katsay\u0131s\u0131n\u0131n yan\u0131 s\u0131ra iyi korozyon direnci \u00f6zellikleri veren birbirine kenetlenmi\u015f plaka benzeri tanelerden olu\u015fur. Olduk\u00e7a dayan\u0131kl\u0131d\u0131r.<\/p>\n
Yo\u011fun SiC seramikleri \u00fcretmek i\u00e7in yeniden kristalle\u015ftirme, reaksiyon sinterleme, s\u0131v\u0131 faz sinterleme, s\u0131cak presleme ve s\u0131cak izostatik sinterleme dahil olmak \u00fczere \u00e7e\u015fitli y\u00f6ntemler vard\u0131r. Bu i\u015flemlerden baz\u0131lar\u0131 serami\u011fin safl\u0131\u011f\u0131n\u0131 bozan sinterleme yard\u0131mc\u0131lar\u0131 kullansa da, t\u00fcm y\u00f6ntemler geni\u015f bir s\u0131cakl\u0131k aral\u0131\u011f\u0131nda m\u00fckemmel termal performansa sahip yo\u011fun seramikler \u00fcretir.<\/p>\n
SiC, zorlu ortamlarda dayan\u0131kl\u0131l\u0131\u011f\u0131n\u0131 art\u0131ran y\u00fcksek s\u0131cakl\u0131k dayan\u0131m\u0131 ve direnciyle geleneksel refrakter malzemelerden ayr\u0131l\u0131r ve seramik end\u00fcstrisi uygulamalar\u0131nda kullan\u0131m i\u00e7in m\u00fckemmeldir. \u00dcst\u00fcn mukavemeti ve oksidasyon direnci nedeniyle, yo\u011fun SiC seramik, f\u0131r\u0131n mobilyas\u0131 ve gaz br\u00fcl\u00f6r\u00fc ortam\u0131n\u0131n yan\u0131 s\u0131ra dizel partik\u00fcl filtreleri olarak kullan\u0131m i\u00e7in tercih edilir; ayr\u0131ca hem mevcut hem de ortaya \u00e7\u0131kan tehditlere kar\u015f\u0131 koruma i\u00e7in y\u00fcksek performansl\u0131 balistik z\u0131rhlarda bile bulunabilir.<\/p>\n
Yeniden kristalize edilmi\u015f silisyum karb\u00fcr (RSiC), \u00fcst\u00fcn termal \u015fok direnci \u00f6zelliklerine sahip geli\u015fmi\u015f bir y\u00fcksek s\u0131cakl\u0131k refrakter seramik malzemedir. Bu nedenle, RSiC gaz br\u00fcl\u00f6rleri, dizel partik\u00fcl filtreleri, termal e\u015fanj\u00f6rler ve termal e\u015fanj\u00f6rler gibi \u00e7ok \u00e7e\u015fitli uygulamalarda bulunabilir. Ola\u011fan\u00fcst\u00fc kimyasal ve oksidasyon direncinin yan\u0131 s\u0131ra termal genle\u015fme\/b\u00fcz\u00fclme dalgalanmalar\u0131na direnen sertli\u011fi ile RSiC'nin \u00fcst\u00fcn oldu\u011fu \u00e7ok say\u0131da end\u00fcstriyel kullan\u0131m alan\u0131 sunar.<\/p>\n
Son derece dayan\u0131kl\u0131 bir malzeme olmas\u0131n\u0131n yan\u0131 s\u0131ra, RSiC ola\u011fan\u00fcst\u00fc oda s\u0131cakl\u0131\u011f\u0131 mukavemetine sahiptir. Alev erozyonuna ve c\u00fcruf sald\u0131r\u0131s\u0131na kar\u015f\u0131 diren\u00e7li olmas\u0131n\u0131n yan\u0131 s\u0131ra a\u015f\u0131nmaya ve b\u00fck\u00fclmeye kar\u015f\u0131 diren\u00e7li olmas\u0131 sayesinde kolayca karma\u015f\u0131k \u015fekillere d\u00f6n\u00fc\u015ft\u00fcr\u00fclebilir - hatta elektrik yal\u0131tkan\u0131 olarak bile i\u015flev g\u00f6r\u00fcr!<\/p>\n
RSiC, silisyum karb\u00fcr tozu, karbon ve ba\u011flay\u0131c\u0131 malzemenin birlikte kar\u0131\u015ft\u0131r\u0131lmas\u0131ndan olu\u015fur ve daha sonra saf RSiC malzemesi \u00fcretmek i\u00e7in y\u00fcksek s\u0131cakl\u0131klarda sinterlenmek \u00fczere bir kal\u0131p haline getirilir. Bu s\u00fcre\u00e7 boyunca toz yeniden kristalle\u015firken ba\u011flay\u0131c\u0131 malzeme da\u011f\u0131l\u0131r ve geride saf RSiC malzemesi kal\u0131r.<\/p>\n
RSiC, y\u00fcksek s\u0131cakl\u0131k uygulamalar\u0131 i\u00e7in kullan\u0131lan \u00f6nde gelen malzemelerden biridir. Sertli\u011fi ve korozyon\/oksidasyon direnci nedeniyle \u00e7ubuklar, sundurma tahtalar\u0131 ve \u00f6zel \u015fekilli par\u00e7alar gibi f\u0131r\u0131n mobilyalar\u0131 i\u00e7in m\u00fckemmel bir se\u00e7imdir. Ayr\u0131ca bu malzeme, f\u0131r\u0131n\u0131n\u0131zda daha fazla kullan\u0131m i\u00e7in porselen par\u00e7alar\u0131n pi\u015firilmesini kolayla\u015ft\u0131rmaya yard\u0131mc\u0131 olman\u0131n yan\u0131 s\u0131ra a\u011f\u0131rl\u0131\u011f\u0131 ve enerji kullan\u0131m\u0131n\u0131 azaltan a\u00e7\u0131k g\u00f6zenekli formlara da d\u00f6n\u00fc\u015ft\u00fcr\u00fclebilir.<\/p>\n
Silisyum karb\u00fcr oda s\u0131cakl\u0131\u011f\u0131nda ola\u011fan\u00fcst\u00fc termal iletkenli\u011fe sahiptir ve d\u00fc\u015f\u00fck genle\u015fme katsay\u0131s\u0131 ve asit korozyon direnci sunar, bu da onu zorlu ortamlar i\u00e7in uygun bir malzeme haline getirir. \u00c7e\u015fitli geometrik \u015fekillerde kal\u0131planabilen Silisyum karb\u00fcr, y\u00fcksek s\u0131cakl\u0131klara da kolayl\u0131kla dayanabilir.<\/p>\n
Kil gibi malzemeler f\u0131r\u0131nlar i\u00e7in sarka\u00e7lar, sundurma tahtalar\u0131 ve silindirler gibi par\u00e7alar\u0131n imalat\u0131nda yayg\u0131n olarak kullan\u0131l\u0131r; bu par\u00e7alar f\u0131r\u0131n \u00fczerindeki y\u00fck\u00fc azalt\u0131rken kullan\u0131m\u0131 art\u0131r\u0131r ve enerji maliyetlerini d\u00fc\u015f\u00fcr\u00fcr. Ayr\u0131ca, g\u00f6zenekli formlar mevcuttur, b\u00f6ylece bir f\u0131r\u0131n\u0131n i\u00e7 duvar alan\u0131n\u0131n herhangi bir konturuna kolayca uyabilirler.<\/p>\n
RSiC, kimyasal olarak saf olmas\u0131 ve y\u00fcksek s\u0131cakl\u0131klarda mukavemetini koruyabilmesi sayesinde seramik emsallerinden ayr\u0131l\u0131r ve yar\u0131 iletken f\u0131r\u0131n bile\u015fenlerinde kullan\u0131m i\u00e7in ideal bir malzeme haline gelir. Ayr\u0131ca, m\u00fckemmel kimyasal safl\u0131\u011f\u0131 ve y\u00fcksek s\u0131cakl\u0131klarda mukavemetini koruma kabiliyeti, f\u0131r\u0131n izolat\u00f6r plakalar\u0131, k\u00fcrekler ve gofret tepsisi destekleri olarak pop\u00fcler bir \u015fekilde kullan\u0131lmas\u0131n\u0131 sa\u011flar. Ayr\u0131ca, bu \u00e7ok y\u00f6nl\u00fc malzeme end\u00fcstriyel y\u00fcksek s\u0131cakl\u0131k f\u0131r\u0131nlar\u0131nda a\u015f\u0131nmaya dayan\u0131kl\u0131 yap\u0131sal par\u00e7alar olarak hizmet vermektedir.<\/p>\n
RSIC seramik, buharla\u015ft\u0131rma-p\u0131ht\u0131la\u015ft\u0131rma i\u015flemi kullan\u0131larak yap\u0131lan ve f\u0131r\u0131nlama i\u00e7in 2400 degC'de pi\u015firilen g\u00f6zenekli bir a\u011f yap\u0131s\u0131na sahip y\u00fcksek safl\u0131kta bir SiC malzemedir. Toz sinterlemenin aksine, RSIC \u00fcretimi infiltrasyon a\u015famas\u0131nda b\u00fcz\u00fclme ya\u015famaz; bu da \u00e7ok b\u00fcy\u00fck par\u00e7alar\u0131n toz sinterlemeye k\u0131yasla daha dar toleranslarla \u00fcretilmesine ve genel olarak daha ucuz olmas\u0131na olanak tan\u0131r.<\/p>\n
Silisyum karb\u00fcr, parabolik kinetik olarak bilinen, oksijenin do\u011frudan substrat\u0131yla reaksiyona girmesini \u00f6nleyen koruyucu silika tabakas\u0131 nedeniyle y\u00fcksek s\u0131cakl\u0131klarda ola\u011fan\u00fcst\u00fc oksidasyon direnci sa\u011flar. Ancak ne yaz\u0131k ki bu s\u00fcre\u00e7, daha y\u00fcksek oksijen ge\u00e7irgenli\u011fi ile viskoz oksit tabakas\u0131 olu\u015fumunu art\u0131ran safs\u0131zl\u0131k katk\u0131 maddeleri veya katyonlar gibi safs\u0131zl\u0131klar ve \u00e7ekirdeklenme b\u00f6lgeleri nedeniyle karma\u015f\u0131kt\u0131r; ayr\u0131ca oksidasyon h\u0131z\u0131, y\u00fczey kaplama kaplamalar\u0131nda bulunan katyonlar\u0131n konsantrasyonlar\u0131na ba\u011fl\u0131d\u0131r.<\/p>\n
Sinterlenmi\u015f silisyum karb\u00fcr oksidasyonu, birka\u00e7 nanometreye kadar ince filmler de dahil olmak \u00fczere \u0131slak ve kuru ortamlar i\u00e7in ge\u00e7erli olan Deal-Grove modeli kullan\u0131larak modellenebilir. Birka\u00e7 nanometreye kadar olan kal\u0131nl\u0131klar i\u00e7in do\u011fru kinetik veriler bu yakla\u015f\u0131m kullan\u0131larak kolayca elde edilebilir; ancak, ince katmanlar yetersiz veri nedeniyle do\u011frusal-parabolik e\u011frilerle donat\u0131lamaz.<\/p>\n
Bas\u0131n\u00e7s\u0131z sinterlenmi\u015f silisyum karb\u00fcr (PSSiC), genellikle y\u00fcksek bas\u0131n\u00e7 ve s\u0131cakl\u0131k a\u015f\u0131nmas\u0131 ve korozyonun a\u015f\u0131r\u0131 ko\u015fullar\u0131na maruz kalan n\u00fckleer end\u00fcstride nozul ve valf olu\u015fturmak i\u00e7in giderek daha pop\u00fcler bir malzemedir. Ayr\u0131ca PSiC, antikorozif boru astarlar\u0131 olarak da b\u00fcy\u00fck bir ba\u015far\u0131yla kullan\u0131labilmektedir.<\/p>\n
SSIC, sinterleme katk\u0131 maddeleri i\u00e7eren \u00e7ok ince tozdan \u00fcretilir ve daha sonra geleneksel seramik \u00fcretim s\u00fcre\u00e7leri kullan\u0131larak i\u015flenir ve sinterleme i\u00e7in 2.000 \u00b0 C'de sinterlenir. Bu teknoloji, geleneksel y\u00f6ntemlere g\u00f6re daha d\u00fc\u015f\u00fck maliyetlerle seri \u00fcretim hacimlerini m\u00fcmk\u00fcn k\u0131lmaktad\u0131r.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide is an increasingly popular material across industries due to its impressive mechanical and electrical properties, particularly its low thermal expansion rate and strength characteristics. Due to this property it makes an ideal candidate for telescope mirror manufacturing. A method for producing recrystallized silicon carbide is presented, consisting of carbothermic reduction. This process heats […]<\/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-70","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/posts\/70","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/comments?post=70"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/posts\/70\/revisions"}],"predecessor-version":[{"id":71,"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/posts\/70\/revisions\/71"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/media?parent=70"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/categories?post=70"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/tr\/wp-json\/wp\/v2\/tags?post=70"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}