Njira yopangira silicon carbide yogwira ntchito yopopera

Kabide ya silicon yopangidwa ndi reaction-sintered ndi chinthu chofunikira kwambiri kutentha kwambiri, chokhala ndi mphamvu zambiri, kuuma kwambiri, kukana kuvala kwambiri, kukana dzimbiri kwambiri komanso kukana okosijeni kwambiri komanso zinthu zina zabwino kwambiri, ndipo imagwiritsidwa ntchito kwambiri mumakina, ndege, makampani opanga mankhwala, mphamvu ndi zina.

 

1. Kukonzekera zinthu zopangira

Kukonzekera kwa zinthu zopangira silicon carbide zosinthika ndi ufa wa kaboni ndi silicon, zomwe kaboni ingagwiritsidwe ntchito pazinthu zosiyanasiyana zokhala ndi kaboni, monga coke ya malasha, graphite, makala, ndi zina zotero. Ufa wa silicon nthawi zambiri umasankhidwa ndi tinthu tating'onoting'ono ta 1-5μm ufa wa silicon woyera kwambiri. Choyamba, ufa wa kaboni ndi silicon umasakanizidwa mu gawo linalake, ndikuwonjezera kuchuluka koyenera kwa binder ndi flow agent, ndikusakaniza mofanana. Kenako chisakanizocho chimayikidwa mu mphero ya mpira kuti chigayidwe ndi kusakaniza kofanana mpaka kukula kwa tinthu tating'onoting'ono kukhale kochepera 1μm.

2. Njira yopangira zinthu

Kuumba ndi chimodzi mwa zinthu zofunika kwambiri popanga silicon carbide. Njira zoumba zomwe zimagwiritsidwa ntchito kwambiri ndi kukanikiza, kuumba grouting ndi kuumba static. Kuumba press kumatanthauza kuti chisakanizocho chimayikidwa mu nkhungu ndikupangidwa ndi makina opanikizika. Kuumba grouting kumatanthauza kusakaniza chisakanizocho ndi madzi kapena organic solvent, kulowetsa mu nkhungu kudzera mu syringe pansi pa vacuum condition, ndikupanga chinthu chomalizidwa chitayima. Kuumba static pressure kumatanthauza kusakaniza mu nkhungu, pansi pa chitetezo cha vacuum kapena mlengalenga kuti muumbe static pressure, nthawi zambiri pa pressure ya 20-30MPa.

3. Njira yoyeretsera

Kupopera ndi gawo lofunika kwambiri pakupanga silicon carbide yopangidwa ndi reaction-sintered. Kutentha kwa popera, nthawi yopopera, mlengalenga wopopera ndi zinthu zina zimakhudza momwe silicon carbide yopangidwa ndi reaction-sintered imagwirira ntchito. Nthawi zambiri, kutentha kwa popera kwa silicon carbide yopopera ndi pakati pa 2000-2400℃, nthawi yopopera nthawi zambiri imakhala maola 1-3, ndipo mlengalenga wopopera nthawi zambiri umakhala wopanda mphamvu, monga argon, nayitrogeni, ndi zina zotero. Panthawi yopopera, chisakanizocho chidzachitika ndi mankhwala kuti apange makristasi a silicon carbide. Nthawi yomweyo, kaboni idzachitanso ndi mpweya mumlengalenga kuti ipange mpweya monga CO2 ndi CO2, zomwe zidzakhudza kuchuluka ndi mawonekedwe a silicon carbide. Chifukwa chake, kusunga mlengalenga woyenera wopopera ndi nthawi yopopera ndikofunikira kwambiri popanga silicon carbide yopangidwa ndi reaction-sintered.

4. Njira yochizira pambuyo pa chithandizo

Kaliboni ya silicon yopangidwa ndi reaction-sintered imafuna njira yokonzedwa pambuyo pa kukonzedwa. Njira zodziwika bwino pambuyo pa kukonzedwa ndi makina, kupukuta, kupukuta, kusungunuka ndi zina zotero. Njirazi zimapangidwa kuti ziwongolere kulondola ndi khalidwe la pamwamba pa kaliboni ya silicon yopangidwa ndi reaction-sintered. Pakati pawo, njira yopukutira ndi kupukuta ndi njira yodziwika bwino yopangira, yomwe ingathandize kukonza kutha ndi kusalala kwa pamwamba pa kaliboni ya silicon. Njira yosungunuka imatha kupanga gawo la oxide kuti iwonjezere kukana kwa oxidation ndi kukhazikika kwa mankhwala a kaliboni ya silicon yopangidwa ndi reaction-sintered.

Mwachidule, kupanga ma silicon carbide osinthika ndi njira yovuta, yomwe imafunika kudziwa bwino ukadaulo ndi njira zosiyanasiyana, kuphatikizapo kukonzekera zinthu zopangira, njira yopangira, njira yopangira ma silicon carbide ndi njira yopangira ma silicon carbide pambuyo pa chithandizo. Pokhapokha ngati mutadziwa bwino ukadaulo ndi njirazi, zinthu zapamwamba kwambiri za silicon carbide zopangidwa ndi ma reaction-sintered zitha kupangidwa kuti zikwaniritse zosowa zamitundu yosiyanasiyana ya ntchito.