Njira yokonzekera, makhalidwe ndi gawo logwiritsira ntchito la silicon carbide yopangidwa ndi reaction-sintered

Kapangidwe ka silicon carbide yopangira zinthu zoyezera kutentha kwambiri ndi njira yokonzekera zinthu zadothi zogwira ntchito bwino kwambiri. Imayamwa ndikukanikiza ufa wa silicon carbide ndi mankhwala ena pansi pa kutentha kwambiri kuti ipange zinthu zokhuthala kwambiri, zolimba kwambiri, zosawonongeka kwambiri komanso zotsutsana ndi dzimbiri.

1. Njira yokonzekera. Njira yokonzekera silicon carbide yosinthira nthawi zambiri imakhala ndi magawo awiri: reaction ndi sintering. Mu gawo la reaction, ufa wa silicon carbide umakumana ndi mankhwala ena pa kutentha kwakukulu kuti apange mankhwala okhala ndi malo otsika osungunuka, monga alumina, boron nitride ndi calcium carbonate. Mankhwalawa amatha kugwira ntchito ngati zomangira ndi zodzaza kuti athandize kuwonjezera mphamvu yolumikizirana ndi kusinthasintha kwa ufa wa silicon carbide pomwe amachepetsa ma pores ndi zolakwika pazinthuzo. Mu gawo la sintering, chinthu chosinthira chimasunthidwa pa kutentha kwambiri kuti chipange zinthu zokhuthala za ceramic. Zinthu monga kutentha, kupanikizika ndi mlengalenga woteteza ziyenera kulamulidwa mu ndondomeko ya sintering kuti zitsimikizire kuti zinthuzo zikugwira ntchito bwino. Zinthu za silicon carbide zomwe zapezeka zili ndi mawonekedwe a kuuma kwambiri, mphamvu yayikulu, kukana dzimbiri kwambiri komanso kukana kuvala kwambiri.

2. Katundu. Kalabu ya silicon yopangidwa ndi reaction-sintered ili ndi makhalidwe abwino kwambiri, zomwe zimapangitsa kuti igwiritsidwe ntchito kwambiri m'magawo ambiri. Choyamba, zinthu za ceramic za silicon carbide zimakhala zolimba kwambiri ndipo zimatha kudula zinthu zolimba monga chitsulo. Kachiwiri, zinthu za ceramic za silicon carbide zimakhala ndi kukana kwabwino kwa kuwonongeka ndipo zitha kugwiritsidwa ntchito kwa nthawi yayitali pansi pa mikhalidwe yovuta monga kutentha kwambiri ndi kuthamanga kwambiri. Kuphatikiza apo, zinthu za ceramic za silicon carbide zimakhala ndi kukana dzimbiri kwambiri komanso kukhazikika kwa kutentha kwambiri, ndipo zitha kugwiritsidwa ntchito kwa nthawi yayitali m'malo owononga komanso kutentha kwambiri.

3. Magawo ogwiritsira ntchito. Silikoni carbide yopangidwa ndi reaction-sintered imagwiritsidwa ntchito m'magawo ambiri. Mwachitsanzo, m'makampani opanga zinthu, zinthu zadothi za silicon carbide zimagwiritsidwa ntchito kwambiri mu zomangira, zida zodulira ndi zida zomangira. Kulimba kwake kwakukulu komanso kukana kuvulala kumapangitsa kuti ikhale yothandiza podula, kupukuta ndi kupukuta.

Zabwino kwambiri popukuta ndi madera ena. Mu makampani opanga mankhwala, zinthu za silicon carbide ceramic zingagwiritsidwe ntchito popanga mankhwala monga sulfuric acid ndi ma acid amphamvu monga hydrofluoric acid chifukwa cha kukana dzimbiri kwambiri komanso kukhazikika kwa kutentha kwambiri. Mu gawo la ndege ndi chitetezo, zinthu za silicon carbide ceramic zingagwiritsidwe ntchito popanga zikwama za zida zankhondo ndi zinthu zoteteza kutentha kwa ndege zothamanga kwambiri. Kuphatikiza apo, zinthu za silicon carbide ceramic zingagwiritsidwenso ntchito m'munda wa biomedical wa ziwalo zopangira ndi zida zopangira opaleshoni ya mafupa, chifukwa zimakhala ndi biocompatibility yabwino komanso kukana kuvala.

Silicon carbide yochita kusinthasintha ndi njira yokonzekera zinthu zadothi zogwira ntchito bwino kwambiri. Imayamwa ndikukanikiza ufa wa silicon carbide ndi mankhwala ena pansi pa kutentha kwambiri kuti ipange zinthu zokhuthala kwambiri, zolimba kwambiri, zosawonongeka kwambiri komanso zosawonongeka kwambiri. Zipangizo zadothi za silicon carbide zili ndi makhalidwe abwino, monga kuuma kwambiri, kusawonongeka kwambiri, kusawonongeka kwambiri komanso kukhazikika kwa kutentha kwambiri, kotero imagwiritsidwa ntchito kwambiri m'magawo ambiri monga kupanga, makampani opanga mankhwala, malo oyendetsera ndege ndi chitetezo komanso m'magawo a zamankhwala.