He aha ka ʻokoʻa ma waena o ka carbide silika i hoʻopaʻa ʻia me ka sintered?

I ka wā e pili ana i ka silicon carbide ceramics, aia ʻelua ʻano nui: hoʻopaʻa paʻa a me ka sintered. ʻOiai ke hāʻawi nei nā ʻano seramika ʻelua i nā pae kiʻekiʻe o ka lōʻihi a me ke kūpaʻa ʻaʻahu, aia kekahi mau ʻokoʻa nui ma waena o nā mea ʻelua.

E hoʻomaka kākou me nā seramika carbide i hoʻopaʻa ʻia. Aia kēia mau seramika ma waena o 85% a me 90% silicon carbide a loaʻa kekahi mau silika. ʻO 1380°C ko lākou pale wela kiʻekiʻe. ʻO kekahi o nā pōmaikaʻi nui o nā seramika silicon carbide i hoʻopaʻa ʻia e hiki ke hoʻohālikelike ʻia i nā ʻano nui a me nā ʻano. Hoʻolilo kēia iā lākou i mau mea kūpono no ka hana ʻana i nā huahana kūʻokoʻa a ʻoihana. Hoʻohui ʻia, ʻo ka haʻahaʻa haʻahaʻa o ka hoʻonui a me ke kūpaʻa maikaʻi loa o kēia mau seramika e lilo lākou i koho kaulana i ka ʻoihana mining cyclone.

ʻO ka carbide silicon pressureless ʻoi aku ka kiʻekiʻe o ka silicon carbide, hiki ke piʻi aku ma mua o 99%, a ʻo ka pale wela kiʻekiʻe he 1650 ° C. Hoʻokomo ʻia kekahi coefficient o ka hoʻonui ʻana i ka wā o ke kaʻina hana sintering, e hana ai i ka pressureless sintered SiC kūpono no ka hana ʻana i nā ʻāpana SiC pololei. Ma muli o kona kiʻekiʻe kiʻekiʻe, pressureless sintered silicon carbide e hoʻohana pinepine ʻia e hana i nā ʻāpana a me nā ʻāpana kikoʻī.

Ma waho aʻe o nā ʻāpana kikoʻī a me nā ʻāpana lole, hiki i nā mea hana kiln kiʻekiʻe no ka ʻoihana kemika ke hoʻohana pono i ka pale wela kiʻekiʻe o ka pressureless sintered silicon carbide. No ka poʻe e ʻimi nei i nā paipu hoʻololi wela kūpono no kā lākou mea hana kemika, pressureless sintered silicon carbide he mea hiki ke koho ʻia.

Ma keʻano laulā, ʻo ka hoʻopaʻa ʻana a me ka sintering pressureless o nā seramika SiC, ʻoiai ʻo kēlā me kēia me kāna mau pono a me nā hemahema, kūpono ia no nā ʻoihana like ʻole a me nā noi. Inā makemake ʻoe i kahi huahana kūʻokoʻa a ʻoi aku paha i hiki ke kū i ka ʻaʻahu, ʻo ka reaction bonded silicon carbide ceramics paha ke koho kūpono iā ʻoe. No nā ʻāpana palupalu ʻoi aku ka pono e kū i nā wela kiʻekiʻe, ʻoi aku ka maikaʻi o ka carbide silicon sintered ʻole. ʻAʻohe ʻano o ka silicon carbide ceramic āu e koho ai, hiki iā ʻoe ke hilinaʻi e hāʻawi ia i ka lōʻihi a me ka hoʻomau i kāu papahana.