Kodi pali kusiyana kotani pakati pa reaction bonded ndi sintered silicon carbide?

Ponena za silicon carbide ceramics, pali mitundu iwiri ikuluikulu:kabodi ya silikoni yolumikizidwa ndi reactionndi sintered silicon carbide. Ngakhale mitundu yonse iwiri ya zoumbaumba imapereka kulimba kwambiri komanso kusawonongeka, pali kusiyana kwakukulu pakati pa ziwirizi.

Tiyeni tiyambe ndi zoumba za silicon carbide zomwe zimagwirizanitsidwa ndi reaction bonded. Zoumba za silicon izi zili pakati pa 85% ndi 90% ndipo zili ndi silicon. Kutentha kwawo kwakukulu ndi 1380°C. Chimodzi mwazabwino zazikulu za zoumba za silicon carbide zomwe zimagwirizanitsidwa ndi reaction ndikuti zimatha kusinthidwa kuti zigwirizane ndi kukula kwakukulu ndi mawonekedwe. Izi zimapangitsa kuti zikhale zipangizo zabwino kwambiri zopangira zinthu zapadera komanso zaukadaulo. Kuphatikiza apo, kuchuluka kochepa kwa kukula komanso kukana bwino kwa zoumba za silicon izi zimapangitsa kuti zikhale zosankhidwa kwambiri mumakampani opanga migodi.

Silikoni yophwanyika yopanda mphamvu imakhala ndi silicon carbide yambiri, yomwe imatha kufika pa 99%, ndipo kutentha kwambiri ndi 1650°C. Kuchuluka kwa kufalikira kumayikidwa panthawi yothira silikoni, zomwe zimapangitsa SiC yophwanyika yopanda mphamvu kukhala yoyenera kupanga zigawo za SiC zolondola. Chifukwa cha kulondola kwake kwakukulu, silikoni yophwanyika yopanda mphamvu nthawi zambiri imagwiritsidwa ntchito popanga nkhungu ndi zigawo zolondola zosatha.

Kuwonjezera pa zinyalala zolondola komanso zida zotha ntchito, zida zapamwamba za uvuni zamafakitale opanga mankhwala zitha kugwiritsa ntchito bwino mphamvu ya silicon carbide yosasunthika kutentha. Kwa iwo omwe akufuna machubu osinthira kutentha ogwira ntchito bwino pazida zawo zopangira mankhwala, silicon carbide yosasunthika ndi chisankho chabwino kwambiri.

Kawirikawiri, kugwirizana kwa reaction ndi kupopera kwa SiC ceramics popanda kupanikizika, ngakhale kuti chilichonse chili ndi ubwino ndi kuipa kwake, ndizoyenera mafakitale ndi ntchito zosiyanasiyana. Ngati mukufuna chinthu chapadera kapena chachikulu chomwe chingapirire kuwonongeka, silicon carbide ceramics yokhala ndi reaction bonded ikhoza kukhala chisankho choyenera kwa inu. Pazinthu zofewa zomwe zimafunika kupirira kutentha kwambiri, silicon carbide yokhala ndi pressureless sintered ikhoza kukhala chisankho chabwino. Kaya mungasankhe mtundu wanji wa silicon carbide ceramic, mutha kukhala otsimikiza kuti ikupatsani kulimba ndi kukhazikika komwe polojekiti yanu ikufuna.