Kupanga ndondomeko ya reactive sintering silicon carbide

Reaction-sintered silicon carbide ndi chinthu chofunikira kwambiri chotentha kwambiri, chokhala ndi mphamvu zambiri, kuuma kwakukulu, kukana kuvala kwambiri, kukana kwa dzimbiri komanso kukana kwa okosijeni ndi zinthu zina zabwino kwambiri, zimagwiritsidwa ntchito kwambiri pamakina, zakuthambo, mafakitale amafuta, mphamvu ndi zina. minda.

 

1. Kukonzekera zakuthupi

Kukonzekera zotakasuka sintering pakachitsulo carbide zopangira makamaka mpweya ndi pakachitsulo ufa, amene carbon angagwiritsidwe ntchito zosiyanasiyana mpweya munali zinthu, monga malasha coke, graphite, makala, etc., pakachitsulo ufa nthawi zambiri amasankhidwa ndi tinthu. kukula kwa 1-5μm mkulu woyera silikoni ufa. Choyamba, ufa wa kaboni ndi silicon umasakanizidwa mu gawo linalake, ndikuwonjezera kuchuluka koyenera kwa binder ndi otaya, ndikuyambitsa mofanana. Kusakaniza kumayikidwa mu mpira mphero kwa mpira mphero kupitirira yunifolomu kusakaniza ndi akupera mpaka tinthu kukula zosakwana 1μm.

2. Kuumba ndondomeko

Kuumba ndi imodzi mwamasitepe ofunikira pakupanga silicon carbide. Nthawi zambiri akamaumba njira ndi kukanikiza akamaumba, grouting akamaumba ndi malo amodzi akamaumba. Press kupanga kumatanthauza kuti osakaniza amaikidwa mu nkhungu ndi kupangidwa ndi mawotchi kuthamanga. Grouting akamaumba amatanthauza kusakaniza osakaniza ndi madzi kapena organic zosungunulira, jekeseni mu nkhungu kudzera mu syringe pansi vacuum mikhalidwe, ndi kupanga chomalizidwa ataima. Kumangirira kwa static kumatanthawuza kusakaniza mu nkhungu, motetezedwa ndi vacuum kapena mlengalenga kuti muwumbe kuthamanga kwa static, nthawi zambiri pamphamvu ya 20-30MPa.

3. Sintering ndondomeko

Sintering ndi sitepe yofunika kwambiri popanga reaction-sintered silicon carbide. Sintering kutentha, sintering nthawi, sintering mpweya ndi zinthu zina zidzakhudza ntchito reaction-sintered silicon carbide. Nthawi zambiri, kutentha kwa sintering sintering silicon carbide kumakhala pakati pa 2000-2400 ℃, nthawi ya sintering nthawi zambiri imakhala maola 1-3, ndipo mpweya wa sintering nthawi zambiri umakhala wopanda, monga argon, nitrogen, ndi zina zotero. Panthawi ya sintering, chisakanizocho chidzapangidwa ndi mankhwala kuti apange makristasi a silicon carbide. Panthawi imodzimodziyo, mpweya udzachitanso ndi mpweya mumlengalenga kuti upange mpweya monga CO ndi CO2, zomwe zidzakhudza kachulukidwe ndi katundu wa silicon carbide. Chifukwa chake, kukhalabe ndi mpweya wabwino komanso nthawi ya sintering ndikofunikira kwambiri popanga reaction-sintered silicon carbide.

4. Pambuyo pa chithandizo

Reaction-sintered silicon carbide imafuna njira yochiritsira pambuyo popanga. Njira zodziwika bwino pambuyo pa chithandizo ndi makina, kugaya, kupukuta, okosijeni ndi zina zotero. Njirazi zidapangidwa kuti zipititse patsogolo kulondola komanso mawonekedwe apamwamba a reaction-sintered silicon carbide. Pakati pawo, kugaya ndi kupukuta ndi njira yodziwika bwino yopangira, yomwe imatha kusintha kutha ndi kusalala kwa silicon carbide pamwamba. Makutidwe ndi okosijeni ndondomeko akhoza kupanga okusayidi wosanjikiza kumapangitsanso kukana makutidwe ndi okosijeni ndi kukhazikika mankhwala anachita-sintered pakachitsulo carbide.

Mwachidule, zotakataka sintering silicon carbide kupanga ndi ndondomeko zovuta, ayenera kudziwa zosiyanasiyana umisiri ndi njira, kuphatikizapo zopangira zopangira, akamaumba ndondomeko, sintering ndondomeko pambuyo mankhwala. Pokhapokha podziwa bwino bwino matekinoloje ndi njirazi zimatha kupanga zida zapamwamba kwambiri za silicon carbide kuti zikwaniritse zosowa za magawo osiyanasiyana ogwiritsira ntchito.