Porcelain ya silicon carbide yokhala ndi reaction-sintered ili ndi mphamvu yabwino yopondereza kutentha kozungulira, kukana kutentha ku okosijeni wa mpweya, kukana bwino kuwononga, kukana kutentha, kukana pang'ono kwa kukula kwa mzere, kukana kutentha kwambiri, kuuma kwambiri, kukana kutentha komanso kuwononga, kupewa moto ndi makhalidwe ena apamwamba. Imagwiritsidwa ntchito kwambiri m'magalimoto, makina odziyimira pawokha, kuteteza chilengedwe, uinjiniya wa ndege, zida zamagetsi, mphamvu zamagetsi ndi zina, yakhala ngati zoumba zadothi zotsika mtengo komanso zosasinthika m'magawo ambiri amafakitale.
Kupopera popanda kupanikizika kumadziwika kuti ndi njira yabwino kwambiri yopopera SiC. Pa makina osiyanasiyana opopera mosalekeza, kupopera popanda kupanikizika kungagawidwe m'magulu awiri: kupopera kolimba ndi kupopera kwa madzi. Powonjezera B ndi C yoyenera (mpweya wochepera 2%) pamodzi mu ufa wabwino kwambiri wa Beta SiC, S. Proehazka imapopera kukhala thupi lopopera la SIC lomwe lili ndi kuchuluka kwa kupitirira 98% mu 2020, ndi Al2O3 ndi Y2O3 ngati zowonjezera. Calcined 0.5m-SiC pansi pa 1850-1950 (pamwamba pa tinthu tating'onoting'ono ndi SiO2 pang'ono), mfundo ndi yakuti kuchuluka kwa SiC porcelain kumaposa 95% ya kuchuluka koyambira kwa chiphunzitso, kukula kwa tirigu ndi kochepa, ndipo kukula kwapakati ndi kwakukulu, komwe ndi 1.5μm.
Silikoni carbide yogwira ntchito yogwira ntchito imatanthauza njira yonse yowunikira kapangidwe ka ma porous billet ndi gawo lamadzimadzi kapena gawo lamadzimadzi lochita bwino kwambiri, kukonza bwino billet, kuchepetsa dzenje lotulukira mpweya, ndikuyika calcining chinthu chomalizidwa ndi mphamvu inayake komanso kulondola kwa miyeso. Ufa wa Plutonium-sic ndi graphite yoyera kwambiri zimasakanizidwa mu gawo linalake ndikutenthedwa mpaka pafupifupi 1650 kuti apange mluza wa tsitsi. Nthawi yomweyo, imalowa kapena kulowa mu chitsulo kudzera mu gawo lamadzimadzi la Si, imawunikira ndi silicon carbide kuti ipange plutonium-sic, ndikulumikizana ndi tinthu ta plutonium-sic tomwe tilipo. Pambuyo polowa mu Si, thupi lokhala ndi reaction silintered lomwe lili ndi kuchuluka kwatsatanetsatane komanso kukula kosatulutsidwa lingapezeke. Poyerekeza ndi njira zina zochitira sintering, mu ndondomeko ya high density reaction sintering kukula kusintha kumakhala kochepa, kumatha kupanga kukula koyenera kwa katundu, koma pali SiC yambiri pa thupi lokhala ndi calcined, mawonekedwe a kutentha kwapamwamba kwa reaction sintered SiC porcelain adzakhala oyipa kwambiri. Ma ceramic a SiC osakakamizidwa ndi calcium, ma ceramic a SiC otentha omwe ali ndi calcium ndi ma ceramic a SiC omwe ali ndi reaction sintered ali ndi makhalidwe osiyanasiyana.
Opanga ma carbide a silicon opopera mphamvu: Mwachitsanzo, SiC porcelain pamlingo wa calcined relative density ndi bend strength, hot pressing sintering ndi hot isostatic pressing calcination ndi ochulukirapo, ndipo reactive sintering SiC ndi yochepa. Nthawi yomweyo, mawonekedwe enieni a SiC porcelain amasintha ndi kusintha kwa calcination modifier. SiC porcelain yosapopera mphamvu, hot pressing sintering ndi reaction sintering ya SiC porcelain imakhala ndi alkaline resistance yabwino komanso acid resistance, koma SiC porcelain yopopera mphamvu imakhala ndi kukana kofooka ku HF ndi asidi ena amphamvu kwambiri. Pamene kutentha kozungulira kuli kochepera 900, mphamvu yopindika ya SiC porcelain yambiri imakhala yayikulu kwambiri kuposa ya SiC porcelain yopopera kutentha kwambiri, ndipo mphamvu yopindika ya SiC porcelain yopopera mphamvu imatsika kwambiri ikapitirira 1400. (Izi zimachitika chifukwa cha kutsika kwadzidzidzi kwa mphamvu yopindika ya galasi linalamined Si kupitirira kutentha kwina m'thupi lopopera. Kugwira ntchito kwa kutentha kwakukulu kwa SiC ceramics sintered popanda pressure calcination komanso pansi pa hot constant static pressure kumakhudzidwa kwambiri ndi mitundu ya zowonjezera.
Nthawi yotumizira: Novembala-07-2023