Rection-sintered silicon carbide porcelain ili ndi mphamvu yabwino yopondereza pa kutentha kozungulira, kukana kutentha kwa okosijeni wa mpweya, kukana kuvala bwino, kukana kutentha kwabwino, kagawo kakang'ono ka kukula kwa mzere, kutentha kwakukulu, kuuma kwakukulu, kukana kutentha ndi kuwononga, kuteteza moto ndi makhalidwe ena apamwamba. Zogwiritsidwa ntchito kwambiri pamagalimoto, makina opangira makina, kuteteza zachilengedwe, uinjiniya wamlengalenga, zida zamagetsi zamagetsi, mphamvu zamagetsi ndi zina, zakhala zotsika mtengo komanso zosasinthika m'mafakitale ambiri.
Sintering yopanda mphamvu imadziwika ngati njira yodalirika ya SiC calcination. Kwa makina osiyanasiyana opitilira aponyera, sintering yopanda atolankhani imatha kugawidwa m'magawo olimba a calcination komanso kuwerengera kwamadzi gawo. Powonjezera B ndi C yoyenera (oxygen yocheperapo 2%) pamodzi mu ufa wabwino kwambiri wa Beta SiC, S. Proehazka imalowetsedwa mu thupi la SIC calcined ndi kachulukidwe wachibale woposa 98% ku 2020, ndi Al2O3 ndi Y2O3 monga zowonjezera. Calcined 0.5m-SiC pansi pa 1850-1950 (tinthu pamwamba ndi SiO2 pang'ono), mapeto ake ndikuti kachulukidwe ka SiC porcelain amaposa 95% ya kachulukidwe koyambira, kukula kwambewu ndi kochepa, ndipo kukula kwake kuli kwakukulu, komwe ndi 1.5m.
Reactive sintering silicon carbide amatanthauza njira yonse yowonetsera porous dongosolo billet ndi gawo lamadzimadzi kapena gawo lamadzimadzi lamadzimadzi, kuwongolera mtundu wa billet, kuchepetsa dzenje lotulukira, ndi kuwerengetsa chomalizidwa ndi mphamvu inayake komanso kulondola kwenikweni. Plutonium-sic ufa ndi high purity graphite zimasakanizidwa mu gawo lina ndikutenthedwa mpaka pafupifupi 1650 kuti apange mluza wa tsitsi. Nthawi yomweyo, imalowa kapena kulowa muzitsulo kudzera mu gawo lamadzi la Si, imawonetsa ndi silicon carbide kupanga plutonium-sic, ndikuphatikiza ndi tinthu tating'ono ta plutonium-sic. Pambuyo Si kulowerera, anachita sintered thupi ndi mwatsatanetsatane wachibale kachulukidwe ndi unpacked kukula akhoza analandira. Poyerekeza ndi njira zina sintering, mu ndondomeko ya mkulu kachulukidwe anachita sintering kukula kusintha ndi yaing'ono, akhoza kulenga olondola kukula kwa katundu, koma pali zambiri SiC pa calcined thupi, mkulu kutentha makhalidwe anachita sintered SiC zadothi zadothi. zidzakhala zoipa. Zoumba za SiC zosakanikizidwa, zoumba zotentha za isostatic calcined SiC ndi ma sintered SiC ceramics ali ndi mawonekedwe osiyanasiyana.
Opanga sintering silicon carbide opanga: Mwachitsanzo, SiC porcelain pamlingo wa calcined wachibale kachulukidwe ndi kupindika mphamvu, kutentha kukanikiza sintering ndi otentha isostatic kukanikiza calcination ndi zambiri, ndi reactive sintering SiC ndi yochepa. Nthawi yomweyo, zinthu zakuthupi za SiC porcelain zimasintha ndikusintha kwa calcination modifier. The non-pressure sintering, otentha atolankhani sintering ndi anachita sintering wa SiC porcelain ndi zabwino zamchere kukana ndi asidi kukana, koma zimene sintered SiC zadothi ali ofooka kukana HF ndi zina amphamvu kwambiri asidi dzimbiri. Kutentha kozungulira kukakhala kosakwana 900, mphamvu yopindika ya porcelain yambiri ya SiC imakhala yokwera kwambiri kuposa ya porcelain yotentha kwambiri, ndipo mphamvu yopindika ya sintered SiC porcelain imatsika kwambiri ikadutsa 1400. (Izi zimayamba chifukwa chadzidzidzi kutsika kwa mphamvu yopindika ya galasi lopangidwa ndi laminated Si kupitirira kutentha kwina m'thupi la calcined Kutentha kwakukulu kwazitsulo za SiC sintered popanda kuthamanga calcination ndi pansi otentha zonse malo amodzi kuthamanga makamaka amakhudzidwa ndi mitundu ya zina.
Nthawi yotumiza: Jun-19-2023