M\u00fchendislik seramikleri olarak da bilinen yap\u0131sal seramikler, esas olarak malzemelerin mekanik, termal, kimyasal ve di\u011fer etkilerini uygulayan bir geli\u015fmi\u015f seramik s\u0131n\u0131f\u0131d\u0131r. Yap\u0131sal seramikler y\u00fcksek s\u0131cakl\u0131k direnci, a\u015f\u0131nma direnci, korozyon direnci, oksidasyon direnci ve y\u00fcksek s\u0131cakl\u0131k alt\u0131nda d\u00fc\u015f\u00fck s\u00fcr\u00fcnme \u00f6zelliklerine sahiptir. Metal malzemelerin ve polimer malzemelerin yetkin olmad\u0131\u011f\u0131 zorlu \u00e7al\u0131\u015fma ortamlar\u0131na dayanabilirler. Havac\u0131l\u0131k, makine, otomobil, metalurji, kimya end\u00fcstrisi, elektronik ve di\u011fer alanlarda yayg\u0131n olarak kullan\u0131lmaktad\u0131rlar ve \u00e7ok h\u0131zl\u0131 geli\u015fen bir seramik malzeme s\u0131n\u0131f\u0131 haline gelmi\u015flerdir Yap\u0131sal seramikler esas olarak oksit seramikler, nitr\u00fcr seramikler ve karb\u00fcr seramikler i\u00e7erir. Silisyum karb\u00fcr seramik esas olarak a\u015fa\u011f\u0131da tan\u0131t\u0131lmaktad\u0131r. Yayg\u0131n olarak karborundum olarak da bilinen silisyum karb\u00fcr, do\u011fada neredeyse hi\u00e7 bulunmayan tipik bir kovalent ba\u011f bile\u015fi\u011fidir. 1890 y\u0131l\u0131nda Eword ve G. Acheson karbonun i\u00e7ine kataliz\u00f6r olarak silisyum ekleyerek elmas sentezlemek istediklerinde silisyum karb\u00fcr\u00fc haz\u0131rlam\u0131\u015flard\u0131r. G\u00fcn\u00fcm\u00fczde hala \u00fczerinde \u00e7al\u0131\u015f\u0131lmakta ve geli\u015ftirilmektedir.<\/p>\n
Silisyum karb\u00fcr ba\u015flang\u0131\u00e7ta, \u00e7e\u015fitli ta\u015flama ta\u015flar\u0131, a\u015f\u0131nd\u0131r\u0131c\u0131 bez, a\u015f\u0131nd\u0131r\u0131c\u0131 ka\u011f\u0131t ve \u00e7e\u015fitli a\u015f\u0131nd\u0131r\u0131c\u0131lar halinde haz\u0131rlanabilen ve mekanik i\u015fleme end\u00fcstrisinde yayg\u0131n olarak kullan\u0131lan s\u00fcper sert performans\u0131 nedeniyle kullan\u0131lm\u0131\u015ft\u0131r. \u0130kinci D\u00fcnya Sava\u015f\u0131'nda, silisyum karb\u00fcr serami\u011fin \u00e7elik \u00fcretiminde bir indirgeyici madde ve bir \u0131s\u0131tma eleman\u0131 olarak da kullan\u0131labilece\u011fi bulunmu\u015f ve b\u00f6ylece h\u0131zl\u0131 geli\u015fimi te\u015fvik edilmi\u015ftir. Daha ileri ara\u015ft\u0131rmalarla, y\u00fcksek s\u0131cakl\u0131k kararl\u0131l\u0131\u011f\u0131, y\u00fcksek termal iletkenlik, asit ve alkali korozyon direnci, d\u00fc\u015f\u00fck genle\u015fme katsay\u0131s\u0131 ve iyi termal \u015fok direnci gibi bir\u00e7ok m\u00fckemmel \u00f6zelli\u011fe sahip oldu\u011fu bulunmu\u015ftur.<\/p>\n
Silisyum karb\u00fcr\u00fcn ba\u015fl\u0131ca iki kristal formu vard\u0131r: k\u00fcbik \u03b2- SIC4 ve alt\u0131gen \u03b1- SIC\u3002 Silisyum karb\u00fcr kafesin temel yap\u0131sal birimleri, birbirinin i\u00e7ine ge\u00e7en SIC4 ve CSI4 tetrahedronlard\u0131r. Tetrahedronlar bir d\u00fczlem katman\u0131 olu\u015fturmak i\u00e7in ayn\u0131 kenar\u0131 payla\u015f\u0131r ve k\u00f6\u015feler \u00fc\u00e7 boyutlu bir mekanizma olu\u015fturmak i\u00e7in bir sonraki tetrahedron katman\u0131na ba\u011flan\u0131r. Farkl\u0131 tetrahedron istifleme dizileri farkl\u0131 yap\u0131lar olu\u015fturabildi\u011finden, \u015fimdiye kadar y\u00fczlerce varyant bulunmu\u015ftur. Genel olarak, kafes tipini temsil etmek i\u00e7in C, H, R harfleri gibi \u00f6zl\u00fc ve sezgisel semboller kullan\u0131l\u0131r ve birim h\u00fccrede bulunan katman say\u0131s\u0131 fark\u0131 g\u00f6stermek i\u00e7in kullan\u0131l\u0131r. Bu polimorflar\u0131n kafes sabitleri farkl\u0131 olmas\u0131na ra\u011fmen, i\u00e7lerindeki maddelerde belirgin bir de\u011fi\u015fiklik yoktur. silisyum karb\u00fcr seramik tipik bir de\u011ferlik bile\u015fi\u011fidir, ancak baz\u0131 iyonik t\u00fcrleri de vard\u0131r. Teorik hesaplamaya g\u00f6re, SI-C ba\u011f\u0131n\u0131n toplam enerjisinin 78%'si kovalent duruma ve 22%'si iyonik duruma aittir. S ve C atomlar\u0131n\u0131n k\u00fc\u00e7\u00fck boyutu, ba\u011f uzunlu\u011fu ve g\u00fc\u00e7l\u00fc kovalans nedeniyle, silisyum karb\u00fcr seramik, y\u00fcksek sertlik, belirli mekanik mukavemet ve zor sinterleme gibi bir dizi \u00f6zelli\u011fe sahiptir.<\/p>\n
Silisyum karb\u00fcr tipik bir kovalent ba\u011fa ba\u011fl\u0131 kararl\u0131 bile\u015fiktir. Buna ek olarak, dif\u00fczyon katsay\u0131s\u0131 d\u00fc\u015f\u00fckt\u00fcr, bu da geleneksel sinterleme y\u00f6ntemleriyle yo\u011funla\u015ft\u0131r\u0131lmas\u0131n\u0131 zorla\u015ft\u0131r\u0131r. Y\u00fczey enerjisini veya y\u00fczey alan\u0131n\u0131 art\u0131rmak i\u00e7in baz\u0131 sinterleme yard\u0131mc\u0131lar\u0131 eklemek ve yo\u011fun silisyum karb\u00fcr seramikler elde etmek i\u00e7in \u00f6zel i\u015flemler uygulamak gerekir. Sinterleme i\u015flemine g\u00f6re silisyum karb\u00fcr, yeniden kristalize silisyum karb\u00fcr seramikler, reaksiyon sinterlenmi\u015f silisyum karb\u00fcr seramikler, bas\u0131n\u00e7s\u0131z sinterlenmi\u015f silisyum karb\u00fcr seramikler, s\u0131cak preslenmi\u015f sinterlenmi\u015f silisyum karb\u00fcr seramikler, y\u00fcksek s\u0131cakl\u0131kta s\u0131cak izostatik presleme sinterlenmi\u015f silisyum karb\u00fcr seramikler ve kimyasal buhar biriktirme silisyum karb\u00fcr olarak ayr\u0131labilir. \u00c7e\u015fitli i\u015flemlerle haz\u0131rlanan silisyum karb\u00fcr\u00fcn \u00f6zellikleri olduk\u00e7a farkl\u0131d\u0131r, yani ayn\u0131 i\u015flemle haz\u0131rlanan SIC, farkl\u0131 hammaddeler ve katk\u0131 maddeleri nedeniyle d\u00fc\u015f\u00fck performansa sahiptir.<\/p>","protected":false},"excerpt":{"rendered":"
Structural ceramics, also known as engineering ceramics, are a class of advanced ceramics that mainly exert the mechanical, thermal, 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-7","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\/7","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=7"}],"version-history":[{"count":4,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/7\/revisions"}],"predecessor-version":[{"id":11,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/7\/revisions\/11"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/media?parent=7"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/categories?post=7"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/tags?post=7"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}