ʻO ka porcelain silicon carbide sintered-reaksi he ikaika compressive maikaʻi i ka mahana ambient, kūpaʻa wela i ka oxidation ea, kūpaʻa ʻaʻahu maikaʻi, kūpaʻa wela maikaʻi, coefficient liʻiliʻi o ka hoʻonui linear, coefficient hoʻoili wela kiʻekiʻe, paʻakikī kiʻekiʻe, kūpaʻa wela a me ka luku, pale ahi a me nā ʻano kiʻekiʻe ʻē aʻe. Hoʻohana nui ʻia i nā kaʻa, automation mechanical, palekana kaiapuni ecological, ʻenekinia aerospace, nā mea uila ʻike ʻike, ka ikehu mana a me nā kahua ʻē aʻe, ua lilo i mea hoʻohuihui keramika kūpono a pono ʻole i nā kahua ʻoihana he nui.
ʻIke ʻia ka sintering pressureless he ʻano calcination SiC hoʻohiki. No nā mīkini hoʻolei hoʻomau like ʻole, hiki ke hoʻokaʻawale ʻia ka sintering press-free i ka calcination pae paʻa a me ka calcination pae wai hana kiʻekiʻe. Ma ka hoʻohui ʻana i ka B kūpono a me C (ʻoi aku ka nui o ka oxygen ma mua o 2%) i loko o kahi pauka Beta SiC maikaʻi loa, ua sintered ʻia ʻo S. Proehazka i loko o kahi kino calcined SIC me ka density pili o ʻoi aku ma mua o 98% ma 2020, me Al2O3 a me Y2O3 e like me nā mea hoʻohui. Calcined 0.5m-SiC ma lalo o 1850-1950 (ʻili ʻāpana me kahi SiO2 liʻiliʻi), ʻo ka hopena ʻo ka density o ka porcelain SiC ma mua o 95% o ka density theoretical kumu, he liʻiliʻi ka nui o ka palaoa, a he nui ka nui awelika, ʻo ia hoʻi he 1.5μm.
ʻO ka reactive sintering silicon carbide e pili ana i ke kaʻina holoʻokoʻa o ka hoʻohālikelike ʻana i ka billet structure porous me ka pae wai a i ʻole ka pae wai hana kiʻekiʻe, e hoʻomaikaʻi ana i ka maikaʻi o ka billet, e hōʻemi ana i ka puka puka, a me ka calcining i ka huahana i hoʻopau ʻia me kahi ikaika a me ka pololei dimensional. Hoʻohui ʻia ka pauka Plutonium-sic a me ka graphite maʻemaʻe kiʻekiʻe i kahi ʻāpana a hoʻomehana ʻia a hiki i kahi 1650 e hana i ka embryo lauoho. I ka manawa like, komo a komo paha i loko o ke kila ma o ka pae wai Si, hoʻohālikelike me ka silicon carbide e hana i ka plutonium-sic, a hoʻohui pū me nā ʻāpana plutonium-sic e kū nei. Ma hope o ka infiltration Si, hiki ke loaʻa ke kino sintered reaction me ka density pili kikoʻī a me ka nui i wehe ʻole ʻia. Hoʻohālikelike ʻia me nā ʻano sintering ʻē aʻe, i ke kaʻina hana o ka hoʻololi ʻana o ka nui sintering reaction density kiʻekiʻe he liʻiliʻi loa, hiki ke hana i ka nui kūpono o nā waiwai, akā he nui ka SiC ma ke kino calcined, ʻoi aku ka ʻino o nā ʻano wela kiʻekiʻe o ka hopena sintered SiC porcelain. ʻO nā keramika SiC calcined non-pressure, nā keramika SiC calcined isostatic wela a me nā keramika SiC sintered reaction he mau ʻano like ʻole.
ʻO nā mea hana silicon carbide sintering reactive: No ka laʻana, ʻoi aku ka nui o ka porcelain SiC ma ka pae o ka density relative calcined a me ka ikaika kūlou, ka sintering wela a me ka calcination kaomi isostatic wela, a he haʻahaʻa loa ka reactive sintering SiC. I ka manawa like, loli nā waiwai kino o ka porcelain SiC me ka loli o ka hoʻololi calcination. Loaʻa i ka sintering non-pressure, ka sintering kaomi wela a me ka sintering reaction o ka porcelain SiC ke kūpaʻa alkaline maikaʻi a me ke kūpaʻa waikawa, akā ʻo ka porcelain SiC sintered reaction he kūpaʻa nāwaliwali i ka HF a me nā ʻano waikawa ikaika loa. Ke emi ka mahana ambient ma mua o 900, ʻoi aku ka kiʻekiʻe o ka ikaika kūlou o ka hapa nui o ka porcelain SiC ma mua o ka porcelain sintered wela kiʻekiʻe, a hāʻule koke ka ikaika kūlou o ka porcelain SiC sintered reactive i ka wā e ʻoi aku ai ma mua o 1400. (Hoʻokumu ʻia kēia e ka hāʻule koke ʻana o ka ikaika kūlou o kahi nui o ke aniani laminated Si ma mua o kahi mahana i loko o ke kino calcined. ʻO ka hana wela kiʻekiʻe o nā keramika SiC sintered me ka ʻole o ke kaomi calcination a ma lalo o ke kaomi static wela e pili nui ʻia e nā ʻano mea hoʻohui.
Ka manawa hoʻouna: Nov-07-2023