Reaksiyona ba\u011fl\u0131 silisyum karb\u00fcr (RBSC), \u00fcst\u00fcn mekanik mukavemet, darbe direnci, kimyasal stabilite ve \u015fekillendirilebilirli\u011fe sahip, \u00e7e\u015fitli uygulamalar i\u00e7in uygun hale getiren ola\u011fan\u00fcst\u00fc sert ve g\u00fc\u00e7l\u00fc bir seramik malzemedir.<\/p>\n
RB-SiC, sinterlenmi\u015f silisyum karb\u00fcr ile kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda daha d\u00fc\u015f\u00fck sertlik sunar, ancak m\u00fckemmel termal \u015fok direnci \u00f6zelliklerine sahipken \u00fcretimi daha kolay ve daha az maliyetlidir.<\/p>\n
RMI prosesi, reaksiyona ba\u011fl\u0131 silisyum karb\u00fcr elde etmek i\u00e7in s\u0131v\u0131 silisyum ile infiltre edilmeden \u00f6nce g\u00f6zenekli bir karbon preformuna (G0) dahil edilmi\u015f a-SiC partik\u00fcllerini kullan\u0131r. Ancak ne yaz\u0131k ki s\u0131v\u0131 silikon, infiltrasyon i\u015flemi nedeniyle g\u00f6zeneklerin t\u0131kanmas\u0131na neden olabilir ve bu nedenle bu \u00e7al\u0131\u015fmada \u00e7ok fazl\u0131 karbon, bu soruna kar\u015f\u0131 bir panzehir olarak ve RB-SiC'nin mekanik \u00f6zelliklerini geli\u015ftirmek i\u00e7in kullan\u0131lm\u0131\u015ft\u0131r.<\/p>\n
\u00c7ok fazl\u0131 karbon, ince amorf karbon siyah\u0131 ve kaba mikro-k\u00fcresel karbondan olu\u015fmu\u015ftur. S\u0131v\u0131 silikon ile infiltre edildi\u011finde, mikro-k\u00fcresel karbon t\u00fcketilirken, amorf karbon g\u00f6zenek dolum reaksiyonlar\u0131n\u0131n t\u0131kanmas\u0131n\u0131 \u00f6nlemek i\u00e7in g\u00f6zeneklerden ka\u00e7abilir - bu nedenle, P10F90, P20F80 ve P30F70 numunelerinde g\u00f6zlemlendi\u011finde karakteristik pik mevcut de\u011fildi, bu da \u00e7ok fazl\u0131 karbonun bu sorunu \u00f6nlemeye yard\u0131mc\u0131 oldu\u011funu ve infiltrasyon s\u0131cakl\u0131\u011f\u0131 ve \u0131slatma s\u00fcresi artt\u0131k\u00e7a e\u011filme mukavemetini art\u0131rd\u0131\u011f\u0131n\u0131 g\u00f6stermektedir.<\/p>\n
RB silisyum karb\u00fcr, erimi\u015f silikonun g\u00f6zenekli bir karbon veya grafit preform i\u00e7ine s\u0131zd\u0131r\u0131lmas\u0131yla \u00fcretilir; burada karbonla reaksiyona girerek SiC olu\u015fturur ve basit koni ve kovan \u015fekillerinden madencilik veya i\u015fleme end\u00fcstrileri i\u00e7in daha b\u00fcy\u00fck m\u00fchendislik par\u00e7alar\u0131na kadar \u00e7e\u015fitli \u015fekil ve boyutlarda gelen ola\u011fan\u00fcst\u00fc bir a\u015f\u0131nma, darbe ve kimyasal diren\u00e7li seramik malzeme olu\u015fturur.<\/p>\n
Kompozit bir \u00f6nc\u00fcl\u00fcn bile\u015fimi, \u00f6zellikle PF'nin FA'ya oran\u0131, y\u00fcksek s\u0131cakl\u0131kta piroliz s\u0131ras\u0131nda karbon ve s\u0131v\u0131 silikon aras\u0131ndaki reaksiyon h\u0131z\u0131n\u0131 etkiler. \u00c7ok fazl\u0131 karbon, g\u00f6zenekli preformlardaki g\u00f6zeneklerden s\u0131v\u0131 silikon penetrasyonunu art\u0131r\u0131r; kademeli karbon kaynaklar\u0131 hem b-SiC i\u00e7eri\u011fini hem de serbest Si'yi kontrol etmeye yard\u0131mc\u0131 olur.<\/p>\n
RB silisyum karb\u00fcr\u00fcn e\u011filme mukavemeti ve elastik mod\u00fcl\u00fc, b\u00fck\u00fclme s\u0131ras\u0131nda taneler aras\u0131 k\u0131r\u0131lmaya neden olan p\u00fcr\u00fczs\u00fcz siyah ve beyaz blok tane y\u00fczeylerinin ortadan kald\u0131r\u0131lmas\u0131 nedeniyle karbon kayna\u011f\u0131n\u0131n dikkatli bir \u015fekilde derecelendirilmesiyle \u00f6nemli \u00f6l\u00e7\u00fcde art\u0131r\u0131labilir.<\/p>\n
Reaksiyonla ba\u011flanm\u0131\u015f silisyum karb\u00fcr seramiklerin termal \u00f6zellikleri, ba\u011flanma t\u00fcr\u00fcne ve oran\u0131na ba\u011fl\u0131d\u0131r. Metalik silikon partik\u00fclleri ile infiltre edilmi\u015f reaksiyon ba\u011fl\u0131 silisyum karb\u00fcr (RBSC), bu i\u015flem s\u0131ras\u0131nda b\u00fcz\u00fclmeyen karbon veya grafit preformlara infiltre edilir; b\u00f6ylece \u00e7ok hassas boyutlara sahip par\u00e7alar olu\u015fturulabilir.<\/p>\n
RBSC ile infiltre edildikten sonra y\u00fcksek s\u0131cakl\u0131klarda nitr\u00fcrleme i\u015flemine tabi tutulur. Bu i\u015flem metalik silikonu SiC nitr\u00fcre d\u00f6n\u00fc\u015ft\u00fcr\u00fcr ve kalan g\u00f6zenek bo\u015fluklar\u0131n\u0131 silisyum karb\u00fcr a\u011f malzemesi ile doldurur. XRD, bu formun elmas, a-SiC, b-SiC, Si ve SiO2 i\u00e7erdi\u011fini g\u00f6sterirken SEM, grafit katmanlar\u0131n\u0131n yan\u0131 s\u0131ra amorf karbonu da g\u00f6stermektedir.<\/p>\n
Mevcut grafit tabakas\u0131 nedeniyle RBSC, sinterlenmi\u015f SiC'den daha d\u00fc\u015f\u00fck k de\u011ferleri sergilemekle birlikte NSIC'inkileri g\u00f6lgede b\u0131rakm\u0131\u015ft\u0131r. Ayr\u0131ca, korozyon direnci, y\u00fcksek s\u0131cakl\u0131k direnci, termal \u015fok direnci ve termal \u015fok emme kapasitesi a\u00e7\u0131s\u0131ndan SiO2 bazl\u0131 seramiklerden \u00f6nemli \u00f6l\u00e7\u00fcde daha iyi performans g\u00f6stermi\u015ftir.<\/p>\n
Reaksiyona ba\u011fl\u0131 silisyum karb\u00fcr, d\u00fc\u015f\u00fck \u00f6zg\u00fcl diren\u00e7 ve y\u00fcksek termal iletkenlik gibi harika elektriksel \u00f6zellikler sunar. Bu \u00f6zellikler onu elektrikli \u0131s\u0131tma elemanlar\u0131 i\u00e7in m\u00fckemmel bir malzeme se\u00e7imi haline getirir. Ayr\u0131ca, kimyasal inertli\u011fi ve oksidasyona kar\u015f\u0131 direnci onu f\u0131r\u0131n termokupllar\u0131, br\u00fcl\u00f6r u\u00e7lar\u0131, kontrol tu\u011flalar\u0131 ve f\u0131r\u0131nlardaki muflalar i\u00e7in uygun hale getirir; \u00fcst\u00fcn termal \u015fok direnci de onu f\u0131r\u0131nlarda mobilya olarak uygun hale getirir.<\/p>\n
Reaksiyon Ba\u011flant\u0131l\u0131 SiC, ince b\u00f6l\u00fcnm\u00fc\u015f samimi sic ve karbon kar\u0131\u015f\u0131mlar\u0131n\u0131n plastikle\u015ftirici ile kar\u0131\u015ft\u0131r\u0131lmas\u0131, ard\u0131ndan s\u0131v\u0131 veya gaz halindeki silikon ile infiltre edilmeden \u00f6nce plastikle\u015ftiricinin \u015fekillendirilmesi ve yak\u0131lmas\u0131 i\u015flemiyle olu\u015fturulabilir. Bu reaksiyon, silikonun karbon ile ba\u011f kurarak daha fazla silisyum karb\u00fcr \u00fcretmesini sa\u011flar ve daha sonra orijinal silisyum karb\u00fcr ile reaksiyona girerek a-SiC, b-SiC ve art\u0131k Si'den olu\u015fan kompozit olu\u015fturur.<\/p>\n
\u0130nfiltrasyon zaman\u0131nda, reaksiyon s\u0131ras\u0131nda olu\u015fan a-SiC gran\u00fcllerinin ve b-SiC'in, muhtemelen yeni olu\u015fan b-SiC partik\u00fclleri taraf\u0131ndan t\u0131kanmayan k\u0131lcal kanallara atfedilen, topaklanma olmaks\u0131z\u0131n g\u00f6zenekli preform boyunca e\u015fit olarak da\u011f\u0131ld\u0131\u011f\u0131 iddia edilmektedir.<\/p>","protected":false},"excerpt":{"rendered":"
Reaction bonded silicon carbide (RBSC) is an exceptionally hard and strong ceramic material with superior mechanical strength, impact resistance, chemical […]<\/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":[5],"tags":[],"class_list":["post-36","post","type-post","status-publish","format-standard","hentry","category-product-related"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/36","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/comments?post=36"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/36\/revisions"}],"predecessor-version":[{"id":37,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/36\/revisions\/37"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/media?parent=36"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/categories?post=36"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/tags?post=36"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}