Njira yopangira zinthu zoyeretsera silicon carbide pogwiritsa ntchito reaction sintering ndi yofunika kwambiri popanga zinthu zoyeretsera zomwe zimagwira ntchito bwino kwambiri. Njirayi imagwiritsa ntchito kutentha kwa magwero a kaboni ndi silicon pa kutentha kwambiri kuti zigwirizane ndi kupanga zinthu zoyeretsera silicon carbide.
1. Kukonzekera zipangizo zopangira. Zipangizo zopangira silicon carbide yopangidwa ndi reaction-sintered zimaphatikizapo gwero la carbon ndi gwero la silicon. Gwero la carbon nthawi zambiri limakhala lakuda kapena polymer yokhala ndi carbon, pomwe gwero la silicon ndi silika wophikidwa. Zipangizo zopangira izi ziyenera kuphwanyidwa, kutsukidwa ndikusakanizidwa kuti zitsimikizire kukula kwa tinthu tofanana, komanso kuwongolera kapangidwe kake ka mankhwala kuti zipeze ceramics zapamwamba za silicon carbide panthawi yotenthetsera.
2. Mawonekedwe. Ikani zinthu zosakanizidwa mu nkhungu yopangira ulusi. Pali mitundu yambiri ya njira zopangira ulusi, zomwe zimagwiritsidwa ntchito kwambiri ndi press molding ndi injection molding. Press molding ndi kukanikiza ufa wa zinthu zopangira utsi pansi pa kukakamizidwa kuti upange, pomwe jekeseni molding ndi zinthu zopangira zomwe zimasakanizidwa ndi guluu, zimapopera mu nkhungu kudzera mu syringe kuti zipange. Pambuyo popanga, ndikofunikira kuchita demoulding treatment kuti muchotse ceramic billet mu nkhungu.
3. Kuchiza ndi kutentha. Thupi la ceramic lomwe lapangidwa limayikidwa mu uvuni wothira kutentha kuti lizimitse. Njira yothira kutentha imagawidwa m'magawo awiri: gawo la carbonization ndi gawo la sintering. Mu gawo la carbonization, thupi la ceramic limatenthedwa kutentha kwambiri (nthawi zambiri pamwamba pa 1600 ° C) pansi pa mlengalenga wopanda mpweya, ndipo gwero la carbon limagwirizana ndi gwero la silicon kuti lipange silicon carbide. Mu gawo la sintering, kutentha kumakwezedwa kutentha kwambiri (nthawi zambiri pamwamba pa 1900 ° C), zomwe zimapangitsa kuti recrystallization ndi density pakati pa tinthu ta silicon carbide. Mwanjira imeneyi, kuchuluka kwa thupi la silicon carbide kumawonjezeka, pomwe kuuma ndi kukana kuvala kumawonjezekanso kwambiri.
4. Kumaliza. Thupi la ceramic lophwanyidwa liyenera kumalizidwa kuti lipeze mawonekedwe ndi kukula komwe mukufuna. Njira zomalizira zimaphatikizapo kupukuta, kudula, kuboola, ndi zina zotero. Chifukwa cha kuuma kwakukulu kwa zinthu za silicon carbide, zimakhala zovuta kuzimaliza, zomwe zimafuna kugwiritsa ntchito zida zopukutira zolondola kwambiri komanso zida zokonzera.
Mwachidule, njira yopangira reaction-sintered silicon carbide ikuphatikizapo kukonzekera zipangizo zopangira, kuumba, kutentha ndi kumaliza. Pakati pawo, gawo lofunika kwambiri ndi njira yopangira kutentha, yomwe kuwongolera kwake ndikofunikira kwambiri kuti mupeze zinthu zapamwamba za silicon carbide. Ndikofunikira kuwongolera kutentha, mlengalenga, nthawi yogwirira ntchito ndi zinthu zina zochitira kutentha kuti muwonetsetse kuti kuchitapo kanthu ndikokwanira, kupangika kwa kristalo kwatha ndipo kuchuluka kwake kuli kwakukulu.
Ubwino wa njira yopangira silicon carbide yopangidwa ndi reaction-sintered ndi wakuti zipangizo za ceramic zomwe zimakhala ndi kuuma kwambiri, mphamvu zambiri, kukana kuvala kwambiri komanso kukhazikika kwa kutentha kwambiri zimatha kukonzedwa. Zinthuzi sizimangokhala ndi mphamvu zabwino kwambiri zamakanika, komanso zimakhala ndi mphamvu zabwino kwambiri zotsutsana ndi dzimbiri komanso kutentha kwambiri. Zipangizo za silicon carbide zingagwiritsidwe ntchito popanga zida zosiyanasiyana za uinjiniya, zisindikizo zamakanika, zida zochizira kutentha, ziwiya za uvuni ndi zina zotero. Nthawi yomweyo, zipangizo za silicon carbide zingagwiritsidwenso ntchito mu semiconductor, mphamvu ya dzuwa, zida zamaginito ndi zina.
Mwachidule, silicon carbide yopangira zinthu zoyeretsera ndi njira yofunika kwambiri yokonzekera zipangizo zadothi zogwira ntchito bwino. Njira yopangira zinthu imafuna kuwongolera bwino ulalo uliwonse kuti mupeze zipangizo za silicon carbide zapamwamba. Zipangizo za silicon carbide zoyeretsera zinthu zoyeretsera zimakhala ndi mphamvu zabwino kwambiri zamakaniko, kukana dzimbiri komanso mphamvu zotentha kwambiri, ndipo zimakhala ndi mwayi wogwiritsidwa ntchito m'magawo osiyanasiyana a mafakitale ndi asayansi.
Nthawi yotumizira: Julayi-21-2023