Pehea ka hana ʻana o ka carbide silika i hoʻopaʻa ʻia?

ʻO ka reaction sintering silicon carbide kahi ala koʻikoʻi e hana i nā mea seramika hana kiʻekiʻe. Hoʻohana kēia ʻano hana i ka mālama wela o nā kumu kalapona a me nā kumu silika i nā wela kiʻekiʻe e hana ai lākou i ka hana ʻana i nā seramika silicon carbide.

1. Hoʻomākaukau i nā mea maka. ʻO nā mea maka o ka reaction-sintered silicon carbide i loaʻa ke kumu kalapona a me ke kumu silika. ʻO ke kumu kalapona he kalapona ʻeleʻele a i ʻole ka polymer i loko o ke kalapona, ʻoiai ʻo ke kumu silika he silica pauka. Pono e ʻoki ʻia kēia mau mea maka, hoʻopaʻa ʻia a hui pū ʻia e hōʻoia i ka nui o nā ʻāpana like ʻole, ʻoiai e hoʻomalu ana i kā lākou hana kemika i mea e loaʻa ai nā seramika silicon carbide kiʻekiʻe i ka wā o ka mālama wela.

2. Kinohi. E hoʻokomo i nā mea maka i hui ʻia i loko o ka mold molding no ka hoʻoheheʻe ʻana. Nui nā ʻano hana hoʻoheheʻe, hoʻohana mau ʻia ʻo ka paʻi paʻi a me ka hoʻoheheʻe injection. ʻO ka hoʻowili ʻana ka paʻi ʻana o ka pauka maka ma lalo o ke kaomi ʻana e hana ai, ʻoiai ʻo ka hoʻoheheʻe ʻia ʻana ka mea maka i hui pū ʻia me kahi mea hoʻopili, hoʻoheheʻe ʻia i loko o ka mold ma o kahi syringe e hana ai. Ma hope o ka hoʻokumu ʻana, pono ia e hoʻokō i ka mālama demoulding e wehe i ka billet ceramic mai ka ʻōpala.

3. Hana wela. Hoʻokomo ʻia ke kino seramika i hana ʻia i loko o ka umu wela no ka sintering. Hoʻokaʻawale ʻia ke kaʻina hana sintering i ʻelua mau pae: carbonization stage a me sintering stage. I ka manawa carbonization, ua wela ke kino seramika i kahi wela kiʻekiʻe (maʻa mau ma luna o 1600 ° C) ma lalo o ka lewa inert, a hoʻopili ke kumu kalapona me ke kumu silika e hana i ka carbide silicon. Ma ke kahua sintering, hoʻokiʻekiʻe ʻia ka mahana i kahi kiʻekiʻe kiʻekiʻe (ʻoi aku ma mua o 1900 ° C), kahi e hoʻoulu ai i ka recrystallization a me ka densification ma waena o nā ʻāpana carbide silicon. Ma kēia ala, ʻoi aku ka maikaʻi o ka nui o ke kino carbide silicon, ʻoiai ke hoʻomaikaʻi nui ʻia ka paʻakikī a me ke kūpaʻa ʻana.

4. Hoʻopau. Pono e hoʻopau ʻia ke kino ceramic sintered no ka loaʻa ʻana o ke ʻano a me ka nui i makemake ʻia. ʻO nāʻano hoʻopauʻana,ʻo ia ka wiliʻana, kaʻokiʻana, ka wiliʻana, a me nā mea'ē aʻe.

I ka hōʻuluʻulu ʻana, ʻo ke kaʻina hana o ka reaction-sintered silicon carbide e pili ana i ka hoʻomākaukau ʻana i nā mea maka, ka hoʻoheheʻe ʻana, ka mālama wela a me ka hoʻopau ʻana. I waena o lākou, ʻo ka hana koʻikoʻi ke kaʻina hana wela, ʻo ka mana o ka mea koʻikoʻi no ka loaʻa ʻana o nā mea carbide silicon kiʻekiʻe. Pono e hoʻomalu i ka mahana, ka lewa, ka manawa paʻa a me nā mea ʻē aʻe o ka hoʻomaʻamaʻa wela e hōʻoia i ka lawa ʻana o ka hopena, ua piha ka crystallization a kiʻekiʻe ke kiʻekiʻe.

ʻO ka pōmaikaʻi o ke kaʻina hana hana silicon carbide reaction-sintered ʻo ia ka mea hiki ke hoʻomākaukau ʻia nā mea seramika me ka paʻakikī kiʻekiʻe, ka ikaika kiʻekiʻe, ke kūpaʻa lole kiʻekiʻe a me ke kūpaʻa wela kiʻekiʻe. ʻAʻole i loaʻa i kēia mea nā waiwai mechanical maikaʻi loa, akā loaʻa nō hoʻi ke kūpaʻa corrosion maikaʻi a me nā waiwai wela kiʻekiʻe. Hiki ke hoʻohana ʻia nā mea silicone carbide no ka hana ʻana i nā ʻāpana ʻenekinia like ʻole, nā sila mechanical, nā mea mālama wela, nā seramika umu ahi a pēlā aku. I ka manawa like, hiki ke hoʻohana ʻia nā mea silicon carbide i semiconductor, ikehu lā, mea magnetic a me nā māla ʻē aʻe.

I ka pōkole, ʻo ka reaction sintering silicon carbide he ala koʻikoʻi e hoʻomākaukau ai i nā mea seramika hana kiʻekiʻe. Pono ke kaʻina hana i ka mana maikaʻi o kēlā me kēia loulou no ka loaʻa ʻana o nā lako silicon carbide kiʻekiʻe. Loaʻa i nā mea ʻenehana silicon carbide Reaction-sintered i nā waiwai mechanical maikaʻi loa, ke kūpaʻa ʻana i ka corrosion a me nā waiwai wela kiʻekiʻe, a loaʻa nā manaʻo noi ākea i nā ʻano ʻenehana a me nā ʻano ʻepekema.