I-silicon carbide ekhupha i-reaction sintering yindlela ebalulekileyo yokuvelisa izixhobo ze-ceramic ezisebenza kakuhle. Le ndlela isebenzisa unyango lobushushu lwemithombo ye-carbon kunye ne-silicon kumaqondo obushushu aphezulu ukuze iphendule xa isenza i-silicon carbide ceramics.
1. Ukulungiswa kwezinto ezikrwada. Izinto ezikrwada ze-reactive-sintered silicon carbide ziquka umthombo wekhabhoni kunye nomthombo we-silicon. Umthombo wekhabhoni uhlala umnyama wekhabhoni okanye i-polymer equlethe ikhabhoni, ngelixa umthombo we-silicon uyi-silica egutyiweyo. Ezi zinto zikrwada kufuneka zityunyuzwe, zihlolwe kwaye zidityaniswe ukuqinisekisa ubungakanani obufanayo beentwana, ngelixa zikwalawula ukwakheka kwazo kweekhemikhali ukuze kufunyanwe iiceramics ze-silicon carbide ezikumgangatho ophezulu ngexesha lonyango lobushushu.
2. Imo. Faka izinto eziluhlaza ezixutyiweyo kwimold yokubumba ukuze zibumbe. Kukho iintlobo ezininzi zeendlela zokubumba, ezisetyenziswa kakhulu yi-press molding kunye ne-injection molding. I-press molding kukucinezelwa komgubo wezinto eziluhlaza phantsi koxinzelelo ukuze ubumbe, ngelixa i-injection molding iyinto eluhlaza exutywe ne-adhesive, itshizwa kwimold ngesirinji ukuze ibumbe. Emva kokubunjwa, kuyimfuneko ukwenza unyango lokususa i-ceramic billet kwimold.
3. Unyango lobushushu. Umzimba we-ceramic owenziweyo ufakwa kwisithando sonyango lobushushu ukuze utshise. Inkqubo yokutshisa yahlulwe yangamanqanaba amabini: inqanaba le-carbonization kunye nenqanaba le-sintering. Kwinqanaba le-carbonization, umzimba we-ceramic utshiswa ukuya kubushushu obuphezulu (ngesiqhelo ngaphezulu kwe-1600 ° C) phantsi komoya ongasebenziyo, kwaye umthombo we-carbon uphendula nomthombo we-silicon ukuvelisa i-silicon carbide. Kwinqanaba lokutshisa, ubushushu buphakanyiswa ukuya kubushushu obuphezulu (ngesiqhelo ngaphezulu kwe-1900 ° C), nto leyo ebangela ukuphinda kusetyenziswe i-crystallization kunye noxinano phakathi kwamasuntswana e-silicon carbide. Ngale ndlela, uxinano lomzimba we-silicon carbide luphucuka ngakumbi, ngelixa ubunzima kunye nokumelana nokuguguleka nako kuphucuka kakhulu.
4. Ukugqiba. Umzimba we-ceramic osikiweyo kufuneka ugqitywe ukuze kufunyanwe imo nobukhulu obufunekayo. Iindlela zokugqiba ziquka ukugaya, ukusika, ukubhoboza, njl. Ngenxa yobunzima obukhulu bezinto ze-silicon carbide, kunzima ukugqiba, nto leyo efuna ukusetyenziswa kwezixhobo zokugaya ezichanekileyo kunye nezixhobo zokucubungula.
Ngamafutshane, inkqubo yokuvelisa i-reaction-sintered silicon carbide ibandakanya ukulungiswa kwezinto eziluhlaza, ukubumba, unyango lobushushu kunye nokugqiba. Phakathi kwazo, inyathelo eliphambili yinkqubo yonyango lobushushu, ulawulo lwayo olubalulekileyo ukuze kufunyanwe izinto ze-silicon carbide ezikumgangatho ophezulu. Kubalulekile ukulawula ubushushu, umoya, ixesha lokubamba kunye nezinye izinto zonyango lobushushu ukuqinisekisa ukuba impendulo yanele, i-crystallization igqityiwe kwaye uxinano luphezulu.
Inzuzo yenkqubo yokuvelisa i-silicon carbide e-sintered reaction kukuba izinto ze-ceramic ezinobunzima obuphezulu, amandla aphezulu, ukumelana nokuguguleka okuphezulu kunye nokuzinza kobushushu obuphezulu zinokulungiswa. Ezi zinto azinazo nje kuphela iimpawu zoomatshini ezintle, kodwa zikwanazo nokumelana nokugqwala okuhle kunye neempawu zobushushu obuphezulu. Izinto ze-silicon carbide zingasetyenziselwa ukuvelisa iindawo ezahlukeneyo zobunjineli, izitywino zoomatshini, izixhobo zonyango lobushushu, ii-ceramics zesithando somlilo njalo njalo. Kwangaxeshanye, izinto ze-silicon carbide zingasetyenziswa nakwi-semiconductor, amandla elanga, izinto zemagnethi kunye nezinye iindawo.
Ngamafutshane, i-reactive sintering silicon carbide yindlela ebalulekileyo yokulungiselela izixhobo zeseramikhi ezisebenza kakuhle. Inkqubo yemveliso ifuna ulawulo oluhle lwekhonkco ngalinye ukuze kufunyanwe izixhobo ze-silicon carbide ezikumgangatho ophezulu. Izixhobo ze-silicon carbide ezifakwe kwi-reaction-sintered zineempawu ezintle zoomatshini, ukumelana nokugqwala kunye neempawu zobushushu obuphezulu, kwaye zinamathuba amaninzi okusetyenziswa kwiindawo ezahlukeneyo zoshishino nezenzululwazi.
Ixesha lokuthumela: Julayi-21-2023