Tsarin kera na reactive sintering silicon carbide

Reaction-sintered silicon carbide ne wani muhimmin high-zazzabi abu, tare da babban ƙarfi, high taurin, high lalacewa juriya, high lalata juriya da kuma high hadawan abu da iskar shaka juriya da sauran m Properties, ana amfani da ko'ina a cikin inji, sararin samaniya, sinadaran masana'antu, makamashi da sauran. filayen.

 

1. Shirye-shiryen albarkatun kasa

A shirye-shiryen na reactive sintering silicon carbide albarkatun kasa ne yafi carbon da silicon foda, wanda carbon za a iya amfani da wani iri-iri na carbon-dauke da abubuwa, kamar kwal coke, graphite, gawayi, da dai sauransu, silicon foda yawanci zaba tare da barbashi. girman 1-5μm high tsarki silicon foda. Na farko, carbon da silicon foda suna gauraye a cikin wani nau'i na musamman, suna ƙara adadin da ya dace na ɗaure da wakili mai gudana, kuma yana motsawa daidai. Sai a saka ruwan a cikin injin niƙa don yin ƙwallo don ƙara uniform da niƙa har girman barbashi bai wuce 1μm ba.

2. Tsarin gyare-gyare

Tsarin gyare-gyare yana ɗaya daga cikin mahimman matakai a masana'antar silicon carbide. Hanyoyin gyare-gyaren da aka fi amfani da su sune gyare-gyaren gyare-gyare, gyare-gyaren gyare-gyare da gyare-gyaren tsaye. Ƙirƙirar latsa yana nufin cewa an saka cakuda a cikin ƙirar kuma an samo shi ta hanyar matsa lamba na inji. Gyaran gyare-gyare yana nufin haɗuwa da cakuda da ruwa ko sauran kaushi na halitta, allurar shi a cikin ƙirar ta hanyar sirinji a ƙarƙashin yanayi mara kyau, da samar da samfurin da aka gama bayan ya tsaya. Tsayayyen matsa lamba gyare-gyare yana nufin cakuda a cikin gyaggyarawa, ƙarƙashin kariyar injin ko yanayi don gyare-gyaren matsa lamba, yawanci a matsa lamba na 20-30MPa.

3. Tsare-tsare

Sintering mataki ne mai mahimmanci a cikin tsarin masana'antu na silicon carbide mai amsawa. Zazzage zafin jiki, lokacin ɓacin rai, yanayin ɓacin rai da sauran abubuwan zasu shafi aikin siliki-carbide mai ɗaukar amsa. Gabaɗaya, zafin zafin jiki na reactive sintering silicon carbide ne tsakanin 2000-2400 ℃, da sintering lokaci ne kullum 1-3 hours, da sintering yanayi yawanci inert, kamar argon, nitrogen, da sauransu. A lokacin sintering, cakuda zai fuskanci wani sinadaran dauki don samar da silicon carbide lu'ulu'u. A lokaci guda kuma, carbon zai kuma mayar da martani tare da iskar gas a cikin yanayi don samar da iskar gas kamar CO da CO2, wanda zai shafi yawa da kaddarorin silicon carbide. Sabili da haka, kiyaye yanayi mai dacewa da kuma lokacin ɓata lokaci yana da matukar mahimmanci don kera na'urar siliki mai ɗaukar hoto.

4. Bayan magani tsari

Silikon carbide mai amsawa-sintered yana buƙatar tsarin jiyya bayan masana'anta. Common post-jiyya matakai ne machining, nika, polishing, hadawan abu da iskar shaka da sauransu. An tsara waɗannan matakai don inganta daidaito da ingancin saman na silicon carbide mai ɗaukar hoto. Daga cikin su, tsarin nika da gogewa shine hanyar sarrafawa na yau da kullun, wanda zai iya haɓaka ƙarewa da kwanciyar hankali na saman silicon carbide. Oxidation tsari na iya samar da wani oxide Layer don inganta hadawan abu da iskar shaka juriya da kuma sinadaran kwanciyar hankali na dauki-sintered silicon carbide.

A takaice, masana'antar siliki carbide mai amsawa wani tsari ne mai rikitarwa, buƙatar ƙware fasaha da matakai iri-iri, gami da shirye-shiryen albarkatun ƙasa, tsarin gyare-gyare, tsarin sintering da tsarin jiyya. Ta hanyar ƙwarewar waɗannan fasahohi da matakai ne kawai za a iya samar da kayan aikin silicon carbide mai inganci don saduwa da buƙatun filayen aikace-aikace daban-daban.