Silisyum karb\u00fcr elyaf, y\u00fcksek s\u0131cakl\u0131kta oksidasyon direnci, sertlik, mukavemet ve d\u00fc\u015f\u00fck yo\u011funluk gibi \u00e7ok say\u0131da avantaja sahip y\u00fcksek performansl\u0131 bir seramik malzemedir. Ayr\u0131ca, m\u00fckemmel korozyon direnci ve termal stabilite \u00f6zelliklerine sahiptir.<\/p>\n
COVID-19, bir\u00e7ok sekt\u00f6r\u00fcn talep ve tedarik zincirlerini olumsuz etkileyerek havac\u0131l\u0131k, uzay ve savunma \u00fcreticileri aras\u0131nda \u00fcretimin yava\u015flamas\u0131na yol a\u00e7t\u0131.<\/p>\n
Silisyum karb\u00fcr elyaflar, 1000 F'yi (540degF) a\u015fan s\u0131cakl\u0131klarda bozulmadan kalmalar\u0131n\u0131 sa\u011flayan ola\u011fan\u00fcst\u00fc k\u0131r\u0131lma mukavemetleri ve oksidasyona kar\u015f\u0131 diren\u00e7leri sayesinde, a\u015f\u0131r\u0131 y\u00fcksek s\u0131cakl\u0131k diren\u00e7leri nedeniyle metal ve seramik matris kompozitler i\u00e7in istisnai bir se\u00e7im olarak \u00f6ne \u00e7\u0131kmaktad\u0131r. Stabiliteleri, zaman i\u00e7inde y\u00fcksek s\u0131cakl\u0131k stabilitesi sa\u011flayan d\u00fc\u015f\u00fck oksijen i\u00e7eriklerinde yatmaktad\u0131r.<\/p>\n
Bu malzeme, nikel bazl\u0131 s\u00fcper ala\u015f\u0131mlara hafif ancak y\u00fcksek performansl\u0131 bir alternatif sunarak benzer mukavemet, \u0131s\u0131 direnci ve kimyasal inertlik sa\u011flarken daha hafif ve daha dayan\u0131kl\u0131d\u0131r. Ayr\u0131ca, kimyasal olarak inert yap\u0131s\u0131, korozyona ve kimyasal hasara kar\u015f\u0131 diren\u00e7li oldu\u011fu anlam\u0131na gelir.<\/p>\n
Y\u00fcksek s\u0131cakl\u0131\u011fa dayan\u0131kl\u0131 silisyum karb\u00fcr elyaf yapmak i\u00e7in yenilik\u00e7i bir \u00fcretim s\u00fcreci olu\u015fturuldu. Hammadde olarak d\u00fc\u015f\u00fck molek\u00fcler silan (LPS) kullan\u0131larak ve AL ve Y i\u00e7eren polikarbosilan (PACS ve PYCS) \u00fcretmek i\u00e7in yo\u011funla\u015ft\u0131rma elemanlar\u0131 i\u00e7eren organik bir bile\u015fikle reaksiyona sokularak, s\u00fcrekli elyaflar daha sonra y\u00fcksek s\u0131cakl\u0131\u011fa dayan\u0131kl\u0131 SiC elyaf olu\u015fturmak i\u00e7in sinterlenmeden \u00f6nce eriyik e\u011firme teknolojisi kullan\u0131larak e\u011frilir.<\/p>\n
Silisyum karb\u00fcr elyaf, a\u015f\u0131r\u0131 s\u0131cakl\u0131klara dayanabilen g\u00fc\u00e7l\u00fc bir malzemedir. Stokiyometrik bile\u015fimi ve polikristalin mikro yap\u0131s\u0131 sayesinde bile\u015fimi y\u00fcksek \u00e7ekme mukavemeti sa\u011flarken, sertli\u011fi ve kimyasal direnci onu metal sertle\u015ftirme i\u015flemlerinin yan\u0131 s\u0131ra metal s\u00f6nd\u00fcrme i\u015flemlerinde ya\u011f s\u00f6nd\u00fcrme uygulamalar\u0131 i\u00e7in uygun hale getirir. Ayr\u0131ca, silisyum karb\u00fcr y\u00fcksek bas\u0131n\u00e7l\u0131 ortamlara dayanabilir - bu da onu ya\u011f pompas\u0131 contalar\u0131 ve bu ko\u015fullar alt\u0131nda \u00e7al\u0131\u015fan di\u011fer mekanik \u00fcr\u00fcnler i\u00e7in m\u00fckemmel bir se\u00e7enek haline getirir.<\/p>\n
Artan havac\u0131l\u0131k ve askeri \u00fcretim, artan NASA fonlar\u0131 ve di\u011fer fakt\u00f6rlerin, spor otomobiller i\u00e7in seramik fren disklerinde ve kur\u015fun ge\u00e7irmez yeleklerde kullan\u0131lan silisyum karb\u00fcr elyafa y\u00f6nelik Kuzey Amerika talebinde art\u0131\u015fa yol a\u00e7mas\u0131 bekleniyor.<\/p>\n
NASA Glenn Ara\u015ft\u0131rma Merkezi, \u00fcreticilerin g\u00fc\u00e7 gereksinimlerini, i\u015fleme s\u0131cakl\u0131klar\u0131n\u0131 ve i\u015fleme s\u00fcrelerini azaltmalar\u0131na ve daha y\u00fcksek performans i\u00e7in hasarl\u0131 veya d\u00fc\u015f\u00fck kaliteli SiC yedek par\u00e7alar\u0131n\u0131 iyile\u015ftirmelerine yard\u0131mc\u0131 olarak daha g\u00fc\u00e7l\u00fc mukavemetli SiC yedek par\u00e7alar\u0131 \u00fcretmek i\u00e7in bir mikrodalga i\u015flemi geli\u015ftirdi. Ayr\u0131ca bu yenilik\u00e7i s\u00fcre\u00e7, kullan\u0131labilir SiC verimini art\u0131r\u0131rken i\u015f\u00e7ilik maliyetlerinden de tasarruf sa\u011fl\u0131yor.<\/p>\n
Silisyum karb\u00fcr elyaflar, m\u00fckemmel termal iletkenlik ve termal genle\u015fme direncine sahip, korozyona dayan\u0131kl\u0131, y\u00fcksek mod\u00fcl mukavemetli ve d\u00fc\u015f\u00fck termal genle\u015fme oranlar\u0131na ve mukavemet \u00f6zelliklerine sahip son derece sert ve dayan\u0131kl\u0131 malzemeler olarak bilinir - bu nitelikler onlar\u0131 metal sertle\u015ftirmede ya\u011f s\u00f6nd\u00fcrme i\u015flemlerinin yan\u0131 s\u0131ra a\u015f\u0131nmaya dayan\u0131kl\u0131 malzemeler veya seramik matrisli kompozitlerde kullan\u0131m i\u00e7in uygun hale getirir.<\/p>\n
Silisyum Karb\u00fcr Elyaf Pazar\u0131n\u0131n B\u00fcy\u00fcmesi S\u00fcrekli silisyum karb\u00fcr elyaf pazar\u0131, havac\u0131l\u0131k ve savunma sanayinin hafif bile\u015fenlere olan talebi nedeniyle h\u0131zla geni\u015flemektedir. Oksidasyona ve kimyasal safl\u0131\u011fa kar\u015f\u0131 \u00fcst\u00fcn direnci nedeniyle, s\u00fcrekli silisyum karb\u00fcr elyaf \u00e7ok say\u0131da uygulamada bulunabilir; dokuma silisyum karb\u00fcr elyaflar ise n\u00fckleer reakt\u00f6rler veya metal\u00fcrjik f\u0131r\u0131nlar gibi y\u00fcksek s\u0131cakl\u0131k uygulamalar\u0131 i\u00e7in bile uygun olabilir.<\/p>\n
Laboratuvar\u0131m\u0131zda \u00fcretilen haz\u0131r SiC-9 ve SiC-14 elyaflar\u0131n y\u00fczey morfolojilerini incelemek i\u00e7in SEM kullan\u0131lm\u0131\u015ft\u0131r. Bu numunelerdeki oksijen i\u00e7eri\u011fi sadece a\u011f\u0131rl\u0131k\u00e7a y\u00fczde 0,07 idi - SiC'nin stokiyometrik oran\u0131n\u0131n \u00f6nemli \u00f6l\u00e7\u00fcde alt\u0131nda. Termal stabilite m\u00fckemmeldi ve uzun \u0131s\u0131l i\u015flemler s\u0131ras\u0131nda bile tespit edilebilir bir de\u011fi\u015fiklik olmad\u0131.<\/p>\n
Silisyum karb\u00fcr fiberler \u00fcst\u00fcn termal, kimyasal ve mekanik \u00f6zelliklere sahip geli\u015fmi\u015f bir seramik malzemedir. Y\u00fcksek s\u0131cakl\u0131klara dayanma kabiliyetleri, onlar\u0131 di\u011fer malzemelerin h\u0131zl\u0131 bir \u015fekilde bozulaca\u011f\u0131 veya ba\u015far\u0131s\u0131z olaca\u011f\u0131 uygulamalar i\u00e7in uygun hale getirirken; s\u00fcr\u00fcnme direnci, oksidasyon direnci, yorulma direnci ve s\u00fcr\u00fcnme direnci, onlar\u0131 havac\u0131l\u0131k ve askeri ekipman uygulamalar\u0131 i\u00e7in uygun malzemeler haline getirir.<\/p>\n
SiC elyaflar\u0131n korozyon direnci, infiltrasyon-piroliz i\u015flemiyle elde edilen d\u00fc\u015f\u00fck g\u00f6zenek yo\u011funlu\u011fu ve y\u00fcksek spesifik y\u00fczey alan\u0131ndan kaynaklanmaktad\u0131r. \u00d6nc\u00fc molek\u00fcllerden gelen polikarbosilan g\u00f6zeneklere girerek ikincil silisyum karb\u00fcr olu\u015fturur ve daha sonra g\u00f6zenek boyutunu azalt\u0131r; bu ad\u0131mla \u00fcretilen ye\u015fil numuneler daha sonra g\u00f6zeneklili\u011fi azalt\u0131rken yo\u011funluklar\u0131n\u0131 art\u0131ran \u00e7ok say\u0131da infiltrasyon-piroliz d\u00f6ng\u00fcs\u00fcne tabi tutulur.<\/p>\n
COVID-19 salg\u0131n\u0131 \u00e7ok say\u0131da sekt\u00f6r\u00fcn arz ve talep zincirinde hasara yol a\u00e7t\u0131. \u00c7ok say\u0131da fabrika kapan\u0131rken, havayollar\u0131 ve savunma sanayi seyahat ve kargo k\u0131s\u0131tlamalar\u0131 nedeniyle faaliyetlerini s\u00fcrd\u00fcrmekte zorlan\u0131yor.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide fiber is a high-performance ceramic material with numerous advantages, including high temperature oxidation resistance, hardness, strength and low […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","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":[3],"tags":[],"class_list":["post-52","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/52","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=52"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/52\/revisions"}],"predecessor-version":[{"id":53,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/52\/revisions\/53"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/media?parent=52"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/categories?post=52"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/tags?post=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}