Kuyerekeza njira yopangira silicon carbide ceramic: njira yopangira sintering ndi zabwino zake ndi zoyipa zake

Silikoni carbide ceramicKuyerekeza njira yopangira zinthu: njira yopangira zinthu ndi ubwino ndi kuipa kwake

Pakupanga ma silicon carbide ceramics, kupanga ndi njira imodzi yokha mu ndondomeko yonseyi. Kupukuta ndiye njira yaikulu yomwe imakhudza mwachindunji magwiridwe antchito omaliza ndi magwiridwe antchito a ma ceramics. Pali njira zambiri zosiyanasiyana zopukuta ma silicon carbide ceramics, iliyonse ili ndi zabwino zake komanso zoyipa zake. Mu positi iyi ya blog, tifufuza njira yopukuta ma silicon carbide ceramics ndikuyerekeza njira zosiyanasiyana.

1. Kutulutsa mphamvu ya kuyamwa kwa zinthu:
Kusakaniza kwa zinthu zoyatsira ndi njira yotchuka yopangira zinthu za silicon carbide. Iyi ndi njira yosavuta komanso yotsika mtengo yomwe imagwirizana ndi kukula kwake. Kusakaniza zinthu zoyatsira kumachitika pogwiritsa ntchito silicidation reaction pa kutentha kochepa kwa 1450 ~ 1600 °C komanso nthawi yochepa. Njirayi imatha kupanga zigawo zazikulu komanso mawonekedwe ovuta. Komabe, ilinso ndi zovuta zake. Kusakaniza kwa siliconizing kumapangitsa kuti 8% ~ 12% ya silicon yaulere mu silicon carbide, zomwe zimachepetsa mphamvu zake zamagetsi kutentha kwambiri, kukana dzimbiri, komanso kukana okosijeni. Ndipo kutentha kogwiritsidwa ntchito kumakhala kochepa pansi pa 1350 °C.

2. Kutentha kofinya:
Kupopera ndi kutentha ndi njira ina yodziwika bwino yopopera ndi zinthu za silicon carbide. Mu njira iyi, ufa wouma wa silicon carbide umadzazidwa mu nkhungu ndikutenthedwa pamene ukupopera ndi mphamvu kuchokera mbali imodzi. Kutenthetsa ndi kupanikizika kumeneku nthawi imodzi kumalimbikitsa kufalikira kwa tinthu, kuyenda, ndi kusamutsa kwa tinthu, zomwe zimapangitsa kuti zinthu za silicon carbide zikhale ndi tinthu tating'onoting'ono, kuchuluka kwakukulu, komanso mphamvu zabwino kwambiri zamakanika. Komabe, kupopera ndi kutentha kulinso ndi zovuta zake. Njirayi ndi yovuta kwambiri ndipo imafuna zipangizo ndi zida zapamwamba kwambiri. Kuchita bwino popanga zinthu ndi kochepa ndipo mtengo wake ndi wokwera. Kuphatikiza apo, njira iyi ndi yoyenera zinthu zokhala ndi mawonekedwe osavuta.

3. Kutentha kwa isostatic kukanikiza sintering:
Kupopera kwa HIP (Hot isostatic pressing) ndi njira yogwiritsira ntchito mpweya wotentha kwambiri komanso wopanikizika kwambiri womwe umagwiritsidwa ntchito ndi isotropically. Umagwiritsidwa ntchito popopera ndi kukulitsa ufa wa ceramic wa silicon carbide, thupi lobiriwira kapena thupi lopangidwa kale. Ngakhale kuti HIP sintering imatha kusintha magwiridwe antchito a silicon carbide ceramics, sigwiritsidwa ntchito kwambiri popanga zinthu zambiri chifukwa cha zovuta zake komanso mtengo wake wokwera.

4. Kuchotsa mpweya popanda kupanikizika:
Kupopera popanda kupanikizika ndi njira yokhala ndi kutentha kwakukulu, njira yosavuta yopopera komanso mtengo wotsika wa silicon carbide ceramics. Imalolanso njira zingapo zopangira, zomwe zimapangitsa kuti ikhale yoyenera mawonekedwe ovuta komanso zigawo zokhuthala. Njira iyi ndi yoyenera kwambiri popanga ma silicon ceramics m'mafakitale akuluakulu.

Mwachidule, njira yopangira simenti ndi gawo lofunika kwambiri pakupanga zinthu za SiC ceramics. Kusankha njira yopangira simenti kumadalira zinthu monga momwe ceramic imafunira, kuuma kwa mawonekedwe ake, mtengo wake wopangira komanso kugwira ntchito bwino. Njira iliyonse ili ndi zabwino zake komanso zoyipa zake, ndipo ndikofunikira kuganizira mosamala zinthuzi kuti mudziwe njira yoyenera yopangira simenti pa ntchito inayake.