Ke kaʻina hana o ka reactive sintering silicon carbide

ʻO ka carbide silicon reaction-sintered he mea koʻikoʻi kiʻekiʻe ka wela, me ka ikaika kiʻekiʻe, ka paʻakikī kiʻekiʻe, ke kūpaʻa kiʻekiʻe, ke kūpaʻa corrosion kiʻekiʻe a me ke kūpaʻa oxidation kiʻekiʻe a me nā waiwai maikaʻi ʻē aʻe, hoʻohana nui ʻia i nā mīkini, aerospace, ʻoihana kemika, ikehu a me nā mea ʻē aʻe. nā māla.

 

1. Hoʻomākaukau mea maka

ʻO ka hoʻomākaukau ʻana o ka reactive sintering silicon carbide raw material ka nui o ke kalapona a me ka pauka silika, kahi e hiki ai ke hoʻohana ʻia ke kalapona i nā ʻano mea i loaʻa i ke kalapona, e like me ka coal coke, graphite, charcoal, etc. ka nui o 1-5μm kiʻekiʻe maʻemaʻe silika pauka. ʻO ka mua, ua hui pū ʻia ka pauka kalapona a me ke silika i kekahi ʻāpana, e hoʻohui i kahi nui kūpono o ka mea hoʻopili a me ka mea hoʻoheheʻe, a hoʻoulu like. A laila, hoʻokomo ʻia ka hui ʻana i loko o ka wili pōleʻa no ka wili pōleʻa e hoʻohui hou i ka hui ʻana a me ka wili ʻana a hiki i ka liʻiliʻi o ka nui o ka ʻāpana ma mua o 1μm.

2. Kaʻina hana hoʻoheheʻe

ʻO ke kaʻina hana ʻo ia kekahi o nā ʻanuʻu koʻikoʻi i ka hana ʻana i ka carbide silicon. ʻO nā kaʻina hana hoʻoheheʻe maʻamau i hoʻohana ʻia ʻo ia ke kaomi ʻana i ka molding, grouting molding a me ka static molding. ʻO ka paʻi ʻana, ʻo ia hoʻi, hoʻokomo ʻia ka hui ʻana i loko o ka mold a hana ʻia e ke kaomi mechanical. Hoʻopili ʻo Grouting molding i ka hui ʻana i ka hui ʻana me ka wai a i ʻole ka mea hoʻoheheʻe organik, e hoʻokomo iā ia i loko o ka mold ma o kahi syringe ma lalo o nā kūlana ʻawaʻawa, a hana i ka huahana i hoʻopau ʻia ma hope o ke kū ʻana. ʻO ka hoʻoheheʻe ʻana i ke kaomi Static e pili ana i ka hui ʻana i loko o ka mold, ma lalo o ka pale ʻana o ka vacuum a i ʻole ka lewa no ka hoʻoheheʻe ʻana i ke kaomi static, maʻamau ma ke kaomi o 20-30MPa.

3. Kaʻina Sintering

ʻO ka Sintering kahi hana koʻikoʻi i ke kaʻina hana o ka reaction-sintered silicon carbide. ʻO ka mahana sintering, ka manawa sintering, ka lewa sintering a me nā mea ʻē aʻe e pili i ka hana o ka carbide silicon reaction-sintered. ʻO ka maʻamau, ʻo ka mahana sintering o ka reactive sintering silicon carbide ma waena o 2000-2400 ℃, ʻo ka manawa sintering maʻamau he 1-3 mau hola, a ʻo ka lewa sintering maʻamau inert, e like me argon, nitrogen, a pēlā aku. I ka wā o ka sintering, e hana ʻia ka hui ʻana i kahi hopena kemika e hana i nā kristal carbide silika. I ka manawa like, e hana pū ke kalapona me nā kinoea i loko o ka lewa e hana i nā kinoea e like me CO a me CO2, e hoʻopilikia i ka nui a me nā waiwai o ka silicon carbide. No laila, ʻo ka mālama ʻana i kahi lewa sintering kūpono a me ka manawa sintering he mea nui loa ia no ka hana ʻana i ka carbide silicon reaction-sintered.

4. Kaʻina hana ma hope o ka mālama ʻana

Pono ka carbide silicon reaction-sintered i kahi kaʻina hana ma hope o ka hana ʻana. ʻO nā kaʻina hana maʻamau ma hope o ka mālama ʻana he machining, wili, polishing, oxidation a pēlā aku. Hoʻolālā ʻia kēia mau kaʻina hana e hoʻomaikaʻi i ka pololei a me ka maikaʻi o ka ʻili o ka carbide silicon reaction-sintered. I waena o lākou, ʻo ke kaʻina hana wili a me ka polishing he ʻano hana maʻamau, hiki ke hoʻomaikaʻi i ka hoʻopau ʻana a me ka palahalaha o ka ʻili silicon carbide. Hiki i ke kaʻina hana oxidation ke hana i kahi papa oxide e hoʻomaikaʻi i ke kūpaʻa oxidation a me ke kūpaʻa kemika o ka carbide silicon reaction-sintered.

I ka pōkole, ʻo ka reactive sintering silicon carbide manufacturing he hana paʻakikī, pono e haku i nā ʻano ʻenehana a me nā kaʻina hana, me ka hoʻomākaukau ʻana i nā mea maka, ke kaʻina hana, ke kaʻina sintering a me ke kaʻina hana hope. Ma muli wale nō o ka hoʻopaʻa ʻana i kēia mau ʻenehana a me nā kaʻina hana hiki ke hana ʻia nā mea kiʻekiʻe kiʻekiʻe reaction-sintered silicon carbide e hoʻokō i nā pono o nā ʻano noiʻi like ʻole.