I-Reaction sintering silicon carbide yindlela ebalulekileyo yokuvelisa izixhobo ze-ceramic ezisebenzayo. Le ndlela isebenzisa unyango lobushushu lwemithombo yekhabhoni kunye nesilicon kumaqondo obushushu aphezulu ukwenza ukuba basabele ukwenza i-silicon carbide ceramics.
1. Ukulungiswa kwemathiriyeli ekrwada. Izinto ezikrwada ze-react-sintered silicon carbide zibandakanya umthombo wekhabhoni kunye nomthombo wesilicon. Umthombo wekhabhoni uhlala umnyama wekhabhoni okanye ipolymer enekhabhoni, ngelixa umthombo wesilicon ungumgubo wesilica. Ezi zixhobo eziluhlaza kufuneka zityunyuzwe, zihlolwe kwaye zixutywe ukuze kuqinisekiswe ubungakanani bamasuntswana afanayo, ngelixa likwalawula ukubunjwa kweekhemikhali zabo ukuze kufumaneke i-silicon carbide ceramics ekumgangatho ophezulu ngexesha lokunyanga ukushisa.
2. Ubume. Beka izinto ezixutywe ekrwada kwindawo yokubumba yokubumba. Zininzi iintlobo zeendlela zokubumba, eziqhele ukusetyenziswa kukubumba ucinezelo kunye nokubumba inaliti. Cinezela ukubumba kukunyanzeliswa komgubo wempahla ekrwada phantsi koxinzelelo ukuze wenze, ngelixa isitofu sokubumba siyinto ekrwada exutywe ne-adhesive, ifafazwe kwi-mold ngesirinji ukwenza. Emva kokuqulunqa, kuyimfuneko ukwenza unyango lwe-demoulding ukususa i-billet ye-ceramic kwi-mold.
3. Unyango lobushushu. Umzimba we-ceramic owenziweyo ufakwa kwiziko lokucoca ubushushu ukwenzela ukutshisa. Inkqubo ye-sintering yahlulwe ibe ngamanqanaba amabini: isigaba se-carbonization kunye nesigaba se-sintering. Kwinqanaba le-carbonization, umzimba we-ceramic ufudunyezwa kwiqondo lokushisa eliphezulu (ngokuqhelekileyo ngaphezu kwe-1600 ° C) phantsi kwe-atmosphere ye-inert, kwaye umthombo wekhabhoni uphendula kunye nomthombo we-silicon ukuvelisa i-silicon carbide. Kwinqanaba le-sintering, iqondo lokushisa liphakanyiswe kwiqondo lokushisa eliphezulu (ngokuqhelekileyo lingaphezulu kwe-1900 ° C), elibangela ukuguqulwa kwakhona kunye nokuxinana phakathi kwamasuntswana e-silicon carbide. Ngale ndlela, ubuninzi bomzimba we-silicon carbide buphuculwa ngakumbi, ngelixa ukuqina kunye nokumelana nokunxiba kuphuculwe kakhulu.
4. Ukugqiba. Umzimba we-ceramic we-sintered kufuneka ugqitywe ukufumana imilo kunye nobukhulu obufunwayo. Iindlela zokugqiba ziquka ukugaya, ukusika, ukugaya, njl. Ngenxa yobunzima obuphezulu kakhulu bezinto ze-silicon carbide, kunzima ukugqiba, kufuna ukusetyenziswa kwezixhobo zokugaya ezichanekileyo kunye nezixhobo zokusebenza.
Isishwankathelo, inkqubo yokuvelisa i-react-sintered silicon carbide ibandakanya ukulungiswa kwezinto eziluhlaza, ukubumba, unyango lobushushu kunye nokugqiba. Phakathi kwabo, inyathelo eliphambili yinkqubo yokunyanga ukushisa, ukulawulwa kwayo kubalulekile ukufumana izinto eziphezulu ze-silicon carbide. Kuyimfuneko ukulawula ubushushu, umoya, ixesha lokubamba kunye nezinye izinto zonyango lobushushu ukuze kuqinisekiswe ukuba impendulo yanele, i-crystallization iphelile kwaye ubuninzi buphezulu.
Inzuzo yenkqubo yokuvelisa i-silicon carbide reaction-sintered kukuba izinto ze-ceramic ezinobunzima obuphezulu, amandla aphezulu, ukuxhathisa ukugqoka okuphezulu kunye nokuzinza okuphezulu kweqondo lokushisa kunokulungiswa. Esi sixhobo asinayo kuphela iipropathi ezigqwesileyo zoomatshini, kodwa zinokumelana nokugqwesa okugqwesileyo kunye neempawu zobushushu obuphezulu. Izixhobo ze-silicon ze-carbide zingasetyenziselwa ukwenza iindawo ezahlukeneyo zobunjineli, izitywina zoomatshini, izixhobo zonyango lobushushu, iikeramics zesithando somlilo njalo njalo. Kwangaxeshanye, izinto ze-silicon carbide zinokusetyenziswa kwakhona kwi-semiconductor, amandla elanga, izixhobo zemagneti kunye nezinye iindawo.
Ngamafutshane, i-react sintering silicon carbide yindlela ebalulekileyo yokulungiselela izixhobo ze-ceramic ezisebenzayo. Inkqubo yokuvelisa idinga ulawulo olufanelekileyo lwekhonkco nganye ukufumana izinto eziphezulu ze-silicon carbide. Izixhobo ze-silicon carbide ezisabelayo zineepropathi ezigqwesileyo zoomatshini, ukuxhathisa umhlwa kunye neempawu zobushushu obuphezulu, kwaye zinethemba elibanzi losetyenziso kwiindawo ezahlukeneyo zoshishino nezesayensi.
Ixesha lokuposa: Jul-21-2023