He pai te kaha pēhanga o te porcelain silicon carbide i te pāmahana taiao, he ātete wera ki te hauhā, he ātete kakahu pai, he ātete wera pai, he iti te tauwehenga whānui raina, he nui te tauwehenga whakawhiti wera, he pakeke teitei, he ātete wera me te whakangaromanga, he ārai ahi me ētahi atu āhuatanga kounga teitei. He whānuitia te whakamahinga i roto i ngā waka, te aunoatanga miihini, te tiaki taiao taiao, te miihini rererangi, ngā taputapu hiko ihirangi mōhiohio, te pūngao hiko me ētahi atu mara, kua riro hei uku-whai hua me te kore e taea te whakakapi i roto i te maha o ngā mara ahumahi.
E mōhiotia ana te sintering kore-pēhanga hei tikanga whakapūmau SiC whai hua. Mō ngā mīhini whakarewa tonu rerekē, ka taea te wehewehe i te sintering kore-pēhi ki te konupūmā ā-wāhanga totoka me te konupūmā ā-wāhanga wai mahi teitei. Mā te tāpiri i te B me te C e tika ana (te ihirangi hāora iti iho i te 2%) ki roto i te paura Beta SiC tino pai, ka sinted a S. Proehazka ki roto i te tinana kua konupūmāhia SIC me te kiato whanaunga neke atu i te 98% i te tau 2020, me te Al2O3 me te Y2O3 hei tāpiri. I konupūmāhia ki te 0.5m-SiC i raro i te 1850-1950 (te mata matūriki me te iti o te SiO2), ko te whakatau ko te kiato o te porcelain SiC neke atu i te 95% o te kiato ariā taketake, he iti te rahi o te witi, ā, he nui te rahi toharite, ko te 1.5μm.
Ko te silicon carbide sintering tauhohe e pā ana ki te tukanga katoa o te whakaata i te hanganga porous o te pirepire ki te wāhanga wai, ki te wāhanga wai mahi teitei rānei, hei whakapai ake i te kounga o te pirepire, hei whakaiti i te kōhao hau, hei whakapūkara i te hua kua oti me te kaha me te tika o te rahinga. Ka whakaranua te paura plutonium-sic me te graphite parakore teitei ki tētahi ōwehenga ka whakamahanahia ki te 1650 pea hei whakaputa i te kukune makawe. I taua wā anō, ka uru, ka uru rānei ki roto i te maitai mā te wāhanga wai Si, ka whakaata ki te silicon carbide hei hanga plutonium-sic, ā, ka hanumi ki ngā matūriki plutonium-sic o mua. I muri i te urunga o te Si, ka taea te whiwhi i te tinana sintering tauhohenga me te matotoru whanaunga taipitopito me te rahi kāore i wetekina. Ki te whakatauritea ki ētahi atu tikanga sintering, i roto i te tukanga o te tauhohenga kiato teitei, he iti noa te huringa rahi sintering, ka taea te hanga i te rahi tika o ngā taonga, engari he nui te SiC i runga i te tinana konutea, ka kino ake ngā āhuatanga pāmahana teitei o te porcelain SiC sinted tauhohenga. He rerekē ngā āhuatanga o ngā uku SiC kua whakapūkarahia kore-pēhanga, ngā uku SiC kua whakapūkarahia wera isostatic me ngā uku SiC kua whakapūkarahia tauhohenga.
Ngā kaihanga silicon carbide sintering tauhohe: Hei tauira, he nui ake te porcelain SiC i te taumata o te kiato whanaunga kua whakapūkarahia me te kaha piko, te sintering pēhi wera me te konupūkara pēhi isostatic wera, ā, he iti noa te sintering tauhohe SiC. I taua wā anō, ka huri ngā āhuatanga ā-tinana o te porcelain SiC me te huringa o te whakarerekētanga konupūkara. He pai te ātete kawakore me te ātete waikawa o te sintering kore-pēhanga, te sintering pēhi wera me te sintering tauhohe o te porcelain SiC, engari he ngoikore te ātete o te porcelain SiC kua whakapūkarahia tauhohe ki te HF me ētahi atu waikura waikawa tino kaha. Ina iti iho te pāmahana taiao i te 900, he nui ake te kaha piko o te nuinga o te porcelain SiC i te porcelain sintered pāmahana teitei, ā, ka heke tere te kaha piko o te porcelain SiC kua whakapūkarahia tauhohe ina neke atu i te 1400. (Ka puta tēnei i te hekenga ohorere o te kaha piko o tētahi nui o te karāhe Si kua whakakikoruatia ki tua atu i tētahi pāmahana i roto i te tinana kua whakapūkarahia. Ko te mahi pāmahana teitei o ngā uku SiC kua whakapūkarahia me te kore konupūkara pēhanga me raro i te pēhanga pumau wera ka pāngia e ngā momo tāpiri.
Wā tuku: Whiringa-ā-rangi-07-2023