ʻO ka hana sintering silicon carbide kahi ʻano hana koʻikoʻi e hana i nā mea seramika hana kiʻekiʻe. Hoʻohana kēia ʻano hana i ka mālama wela o nā kumu kalapona a me silicon ma nā mahana kiʻekiʻe e hana ai iā lākou e hana i nā seramika silicon carbide.
1. Hoʻomākaukau ʻana i nā mea maka. ʻO nā mea maka o ka silicon carbide i hoʻopili ʻia me ka hopena e komo pū me ke kumu kalapona a me ke kumu silicon. ʻO ke kumu kalapona he kalapona ʻeleʻele a i ʻole he polymer i loaʻa i ke kalapona, ʻoiai ʻo ke kumu silicon he silica pauka. Pono e kuʻi ʻia kēia mau mea maka, kānana ʻia a hui pū ʻia e hōʻoia i ka nui like o nā ʻāpana, me ka hoʻomalu pū ʻana i kā lākou ʻano kemika i mea e loaʻa ai nā keramika silicon carbide kiʻekiʻe i ka wā o ka mālama wela.
2. ʻAno. E hoʻokomo i nā mea maka i kāwili ʻia i loko o ka ʻōmole hoʻoheheʻe no ka hoʻoheheʻe ʻana. Nui nā ʻano hana hoʻoheheʻe, ʻo ka hoʻoheheʻe kaomi a me ka hoʻoheheʻe inikini ka mea i hoʻohana pinepine ʻia. ʻO ka hoʻoheheʻe kaomi ka hoʻopili ʻana i ka pauka mea maka ma lalo o ke kaomi e hana, ʻoiai ʻo ka hoʻoheheʻe inikini ka mea maka i kāwili ʻia me kahi mea hoʻopili, ua pīpī ʻia i loko o ka ʻōmole ma o kahi syringe e hana. Ma hope o ka hoʻokumu ʻana, pono e hana i ka mālama demoulding e wehe i ka billet seramika mai ka ʻōmole.
3. Ka mālama wela. Hoʻokomo ʻia ke kino keramika i hana ʻia i loko o ka umu mālama wela no ka sintering. Ua māhele ʻia ke kaʻina hana sintering i ʻelua mau pae: ke kahua carbonization a me ke kahua sintering. I ke kahua carbonization, ua hoʻomehana ʻia ke kino keramika i kahi mahana kiʻekiʻe (ma luna o 1600 ° C) ma lalo o kahi lewa inert, a pane ke kumu kalapona me ke kumu silicon e hana i ka silicon carbide. I ke kahua sintering, ua hoʻokiʻekiʻe ʻia ka mahana i kahi mahana kiʻekiʻe (ma luna o 1900 ° C), kahi e hoʻoulu ai i ka recrystallization a me ka densification ma waena o nā ʻāpana silicon carbide. Ma kēia ʻano, ua hoʻomaikaʻi hou ʻia ka nui o ke kino silicon carbide, ʻoiai ua hoʻomaikaʻi nui ʻia ka paʻakikī a me ke kūpaʻa ʻana i ka ʻaʻahu.
4. Hoʻopau ʻana. Pono e hoʻopau ʻia ke kino keramika sintered e loaʻa ai ke ʻano a me ka nui i makemake ʻia. ʻO nā ʻano hoʻopau e komo pū me ka wili ʻana, ka ʻoki ʻana, ka wili ʻana, a me nā mea ʻē aʻe. Ma muli o ka paʻakikī loa o ka mea silicon carbide, he paʻakikī ke hoʻopau ʻana, e koi ana i ka hoʻohana ʻana i nā mea hana wili kiʻekiʻe a me nā lako hana.
I ka hōʻuluʻulu manaʻo, ʻo ke kaʻina hana o ka silicon carbide i hoʻopili ʻia me ka hopena e komo pū ana me ka hoʻomākaukau ʻana i nā mea maka, ka hoʻoheheʻe ʻana, ka mālama wela a me ka hoʻopau ʻana. I waena o lākou, ʻo ke kaʻina hana nui ka mālama wela, ʻo ka kaohi ʻana he mea nui ia e loaʻa ai nā mea silicon carbide kiʻekiʻe. Pono e kaohi i ka mahana, ka lewa, ka manawa paʻa a me nā mea ʻē aʻe o ka mālama wela e hōʻoia i ka lawa ʻana o ka hopena, ua pau ka crystallization a ua kiʻekiʻe ka density.
ʻO ka pōmaikaʻi o ke kaʻina hana hana silicon carbide i hoʻopili ʻia me ka hopena, ʻo ia ka hiki ke hoʻomākaukau i nā mea keramika me ka paʻakikī kiʻekiʻe, ka ikaika kiʻekiʻe, ke kūpaʻa kiʻekiʻe o ka ʻaʻahu a me ke kūpaʻa wela kiʻekiʻe. ʻAʻole wale kēia mea i nā waiwai mechanical maikaʻi loa, akā he kūpaʻa maikaʻi loa hoʻi i ka corrosion a me nā waiwai wela kiʻekiʻe. Hiki ke hoʻohana ʻia nā mea Silicon carbide e hana i nā ʻāpana ʻenekinia like ʻole, nā sila mechanical, nā mea mālama wela, nā keramika umu a pēlā aku. I ka manawa like, hiki ke hoʻohana ʻia nā mea silicon carbide i ka semiconductor, ka ikehu lā, nā mea magnetic a me nā kahua ʻē aʻe.
I ka pōkole, ʻo ka hana sintering silicon carbide kahi ʻano hana koʻikoʻi e hoʻomākaukau ai i nā mea seramika hana kiʻekiʻe. Pono ke kaʻina hana i ka kaohi maikaʻi o kēlā me kēia loulou e loaʻa ai nā mea silicon carbide kiʻekiʻe. Loaʻa i nā mea silicon carbide i hoʻohui ʻia i ka hopena nā waiwai mechanical maikaʻi loa, ke kūpaʻa i ka pala a me nā waiwai wela kiʻekiʻe, a he mau manaʻolana hoʻohana ākea i nā ʻano ʻoihana a me nā ʻepekema like ʻole.
Ka manawa hoʻouna: Iulai-21-2023