Ikhiqizwa kanjani i-silicon carbide e-reaction-sintered?

I-silicon carbide eshintshashintshayo iyindlela ebalulekile yokukhiqiza izinto ze-ceramic ezisebenza kahle kakhulu. Le ndlela isebenzisa ukwelashwa kokushisa kwemithombo ye-carbon ne-silicon emazingeni okushisa aphezulu ukuze ibenze basabele ekwakheni i-silicon carbide ceramics.

1. Ukulungiswa kwezinto zokusetshenziswa. Izinto zokusetshenziswa ze-silicon carbide e-reaction-sintered zihlanganisa umthombo we-carbon kanye nomthombo we-silicon. Umthombo we-carbon ngokuvamile umnyama we-carbon noma i-polymer equkethe i-carbon, kanti umthombo we-silicon uyi-silica eyimpuphu. Lezi zinto zokusetshenziswa zidinga ukuchotshozwa, zihlolwe futhi zixutshwe ukuqinisekisa ubukhulu bezinhlayiya ezifanayo, kuyilapho futhi kulawulwa ukwakheka kwamakhemikhali azo ukuze kutholakale i-ceramics ye-silicon carbide esezingeni eliphezulu ngesikhathi sokwelashwa kokushisa.

2. Ukuma. Faka izinto zokusetshenziswa ezixubile esikhumbeni sokubumba ukuze zibunjwe. Kunezinhlobo eziningi zezindlela zokubumba, ezivame ukusetshenziswa yi-press molding kanye ne-injection molding. I-press molding ukucindezelwa kwempuphu yezinto zokusetshenziswa ngaphansi kwengcindezi ukuze zakheke, kuyilapho i-injection molding iyinto eluhlaza exutshwe ne-glue, ifuthwa esikhumbeni ngesirinji ukuze yakheke. Ngemva kokwakheka, kuyadingeka ukwenza ukwelashwa kokususa i-billet ye-ceramic esikhumbeni.

3. Ukwelashwa ngokushisa. Umzimba we-ceramic owakhiwe ufakwa esithandweni sokwelashwa ngokushisa ukuze ushiswe. Inqubo yokushisa ihlukaniswe ngezigaba ezimbili: isigaba sokushisa nge-carbonization kanye nesigaba sokushisa nge-carbonization. Esigabeni sokushisa nge-carbonization, umzimba we-ceramic ushiswa ekushiseni okuphezulu (ngokuvamile ngaphezu kuka-1600 ° C) ngaphansi komkhathi ongasebenzi, futhi umthombo we-carbon usabela nomthombo we-silicon ukuze ukhiqize i-silicon carbide. Esigabeni sokushisa nge-carbonization, izinga lokushisa liphakanyiswa liye ekushiseni okuphezulu (ngokuvamile ngaphezu kuka-1900 ° C), okubangela ukuphinda kusetshenziswe kanye nokuqina phakathi kwezinhlayiya ze-silicon carbide. Ngale ndlela, ubuningi bomzimba we-silicon carbide buthuthukiswa kakhulu, kuyilapho ubulukhuni kanye nokumelana nokuguguleka nakho kuthuthukiswa kakhulu.

4. Ukuqeda. Umzimba we-ceramic osikiwe udinga ukuqedwa ukuze uthole ukuma nosayizi owufunayo. Izindlela zokuqeda zifaka phakathi ukugaya, ukusika, ukubhoboza, njll. Ngenxa yobunzima obukhulu kakhulu bezinto ze-silicon carbide, kunzima ukuqeda, okudinga ukusetshenziswa kwamathuluzi okugaya anembe kakhulu kanye nemishini yokucubungula.

Ngamafuphi, inqubo yokukhiqizwa kwe-reaction-sintered silicon carbide ihlanganisa ukulungiswa kwezinto zokusetshenziswa, ukubumba, ukwelashwa kokushisa kanye nokuqedwa. Phakathi kwazo, isinyathelo esibalulekile inqubo yokwelashwa kokushisa, okuwukulawulwa kwayo okubalulekile ukuthola izinto ze-silicon carbide ezisezingeni eliphezulu. Kuyadingeka ukulawula izinga lokushisa, umkhathi, isikhathi sokubamba kanye nezinye izici zokwelashwa kokushisa ukuqinisekisa ukuthi ukusabela kwanele, ukukristala kuqediwe kanye nobuningi buphezulu.

Inzuzo yenqubo yokukhiqizwa kwe-silicon carbide e-reaction-sintered ukuthi izinto ze-ceramic ezinobunzima obuphezulu, amandla aphezulu, ukumelana nokuguguleka okuphezulu kanye nokuqina kokushisa okuphezulu zingalungiswa. Lokhu okubalulekile akugcini nje ngokuba nezakhiwo ezinhle kakhulu zemishini, kodwa futhi kunokumelana nokugqwala okuhle kakhulu kanye nezakhiwo zokushisa okuphezulu. Izinto ze-silicon carbide zingasetshenziswa ukukhiqiza izingxenye ezahlukene zobunjiniyela, izivalo zemishini, amadivayisi okwelapha ukushisa, i-ceramics yesithando nokunye. Ngesikhathi esifanayo, izinto ze-silicon carbide zingasetshenziswa futhi kuma-semiconductor, amandla elanga, izinto zamagnetic kanye neminye imikhakha.

Ngamafuphi, i-silicon carbide ekhipha ukusabela iyindlela ebalulekile yokulungiselela izinto ze-ceramic ezisebenza kahle kakhulu. Inqubo yokukhiqiza idinga ukulawulwa okuhle kwesixhumanisi ngasinye ukuze kutholakale izinto ze-silicon carbide ezisezingeni eliphezulu. Izinto ze-silicon carbide ezisebenzisa ukusabela zinezakhiwo ezinhle kakhulu zemishini, ukumelana nokugqwala kanye nezakhiwo zokushisa okuphezulu, futhi zinamathuba amaningi okusetshenziswa emikhakheni eyahlukene yezimboni neyesayensi.