I-Reaction sintering silicon carbide iyindlela ebalulekile yokukhiqiza izinto ezisezingeni eliphezulu ze-ceramic. Le ndlela isebenzisa ukwelashwa kokushisa kwemithombo ye-carbon ne-silicon emazingeni okushisa aphezulu ukuze ibenze basabele ukwenza izitsha ze-silicon carbide ceramics.
1. Ukulungiswa kwezinto zokusetshenziswa. Izinto zokusetshenziswa ze-react-sintered silicon carbide zihlanganisa umthombo wekhabhoni nomthombo we-silicon. Umthombo wekhabhoni uvamise ukuba yi-carbon black noma i-polymer equkethe i-carbon, kuyilapho umthombo we-silicon uyimpuphu ye-silica. Lezi zinto zokusetshenziswa zidinga ukuchotshozwa, zihlolwe futhi zixutshwe ukuze kuqinisekiswe usayizi wezinhlayiyana ezifanayo, kuyilapho futhi kulawula ukwakheka kwazo kwamakhemikhali ukuze kutholwe i-silicon carbide ceramics yekhwalithi ephezulu ngesikhathi sokwelashwa kokushisa.
2. Isimo. Faka izinto ezisetshenziswayo ezixubile ekubumbeni ukubumba. Kunezinhlobo eziningi zezindlela zokubumba, ezivame ukusetshenziswa ukubumba ukucindezela kanye nokubunjwa komjovo. Ukubumba ukucindezela ukucindezelwa kwempushana yezinto ezingavuthiwe ngaphansi kwengcindezi ukuze yakhe, kuyilapho ukubumba komjovo kuyimpahla eluhlaza exutshwe ne-adhesive, ifuthwe esibunjeni ngesipetu ukuze kwakheke. Ngemuva kokwakhiwa, kuyadingeka ukwenza ukwelashwa kwe-demoulding ukususa i-billet ye-ceramic ekubunjeni.
3. Ukwelashwa kokushisa. Umzimba we-ceramic owenziwe ufakwa esithandweni sokushisa ukushisa ukuze ushiswe. Inqubo ye-sintering ihlukaniswe izigaba ezimbili: isigaba se-carbonization kanye nesiteji se-sintering. Esigabeni se-carbonization, umzimba we-ceramic ushiselwa ezingeni lokushisa eliphezulu (imvamisa engaphezu kuka-1600 ° C) ngaphansi komkhathi ongasebenzi, futhi umthombo wekhabhoni uhlangana nomthombo we-silicon ukukhiqiza i-silicon carbide. Esigabeni se-sintering, izinga lokushisa likhuphukela kuzinga lokushisa eliphakeme (imvamisa libe ngaphezu kuka-1900 ° C), okubangela ukuphinda kukhanye futhi kube nokuminyana phakathi kwezinhlayiya ze-silicon carbide. Ngale ndlela, ukuminyana komzimba we-silicon carbide kuthuthukiswa ngokwengeziwe, kuyilapho ubulukhuni nokumelana nokugqoka nakho kuthuthukiswa kakhulu.
4. Ukuqeda. Umzimba we-ceramic we-sintered udinga ukuqedwa ukuze uthole umumo nosayizi oyifunayo. Izindlela zokuqeda zihlanganisa ukugaya, ukusika, ukubhoboza, njll Ngenxa yokuqina okuphezulu kakhulu kwezinto ze-silicon carbide, kunzima ukuqeda, okudinga ukusetshenziswa kwamathuluzi okugaya okunemba okuphezulu kanye nemishini yokucubungula.
Kafushane, inqubo yokukhiqiza ye-react-sintered silicon carbide ihlanganisa ukulungiswa kwezinto ezingavuthiwe, ukubumba, ukwelashwa kokushisa nokuqeda. Phakathi kwazo, isinyathelo esibalulekile yinqubo yokwelapha ukushisa, ukulawulwa kwayo okubalulekile ukuthola izinto ezisezingeni eliphezulu ze-silicon carbide. Kuyadingeka ukulawula izinga lokushisa, umkhathi, isikhathi sokubamba kanye nezinye izici zokwelashwa kokushisa ukuze kuqinisekiswe ukuthi ukusabela kwanele, i-crystallization iphelele futhi ukuminyana kuphezulu.
Inzuzo yenqubo yokukhiqiza i-silicon carbide yokusabela-sintered ukuthi izinto zobumba ezinobunzima obukhulu, amandla aphezulu, ukumelana nokugqoka okuphezulu kanye nokuzinza okuphezulu kwezinga lokushisa kungalungiswa. Lezi zinto azigcini nje ngokuba nezinto ezinhle kakhulu zemishini, kodwa futhi zinokumelana nokugqwala okuhle kakhulu kanye nezakhiwo zokushisa okuphezulu. Izinto ze-silicon carbide zingasetshenziswa ukwenza izingxenye ezihlukahlukene zobunjiniyela, izimpawu zemishini, amadivaysi okwelapha ukushisa, izitsha zobumba zomlilo nokunye. Ngesikhathi esifanayo, izinto ze-silicon carbide nazo zingasetshenziswa ku-semiconductor, amandla elanga, izinto kazibuthe nezinye izinkambu.
Ngamafuphi, i-reaction sintering silicon carbide iyindlela ebalulekile yokulungisa izinto zobumba ezisezingeni eliphezulu. Inqubo yokukhiqiza idinga ukulawula okuhle kwesixhumanisi ngasinye ukuze uthole izinto ezisezingeni eliphakeme ze-silicon carbide. Izinto ezisetshenziswayo ze-silicon carbide ezisabelayo zinezakhiwo ezinhle kakhulu zemishini, ukumelana nokugqwala kanye nezakhiwo zokushisa okuphezulu, futhi zinethuba elibanzi lokufaka isicelo emikhakheni eyahlukene yezimboni neyesayensi.
Isikhathi sokuthumela: Jul-21-2023