Ma ke kahua nui o ka ʻepekema waiwai, ua lilo ka silicon carbide ceramics i "deling" o nā ʻano ʻenehana kiʻekiʻe ma muli o ko lākou mau waiwai maikaʻi e like me ka paʻakikī kiʻekiʻe, ka ikaika kiʻekiʻe, ke kūpaʻa wela maikaʻi, a me ke kūpaʻa kemika. Mai ka aerospace a i ka hana semiconductor, mai nā kaʻa ikehu hou i nā mīkini ʻenehana, hana nui nā seramika silicon carbide. I ka hoʻomākaukau ʻana o ka silicon carbide ceramics, ʻo ke ʻano sintering ke kumu nui e hoʻoholo ai i kāna mau waiwai a me ka pae noi. I kēia lā, e ʻimi mākou i ke kaʻina hana sintering o ka silicon carbide a nānā i ka ʻimi ʻana i nā pono kūʻokoʻa o ka hopena sintered.silika carbide seramika.
Nā ʻano hana sintering maʻamau no ka carbide silika
Aia nā ʻano hana sintering no ka silicon carbide, kēlā me kēia me kāna mau kumu kūʻokoʻa a me nā ʻano.
1. ʻO ka hoʻoheheʻe ʻana wela: ʻO kēia ʻano hana sintering e pili ana i ka waiho ʻana i ka pauka silicon carbide i loko o ka mold, e hoʻohana ana i kekahi kaomi i ka wā e hoʻomehana ai, e hoʻopau i nā kaʻina hana hoʻoheheʻe a me ka sintering i ka manawa like. Hiki ke loaʻa i ka sintering hoʻoheheʻe wela ke loaʻa nā seramika silicon carbide ma kahi haʻahaʻa haʻahaʻa a i ka manawa pōkole, me ka nui o ka palaoa maikaʻi a me nā waiwai mechanical maikaʻi. Eia nō naʻe, paʻakikī nā mea hana hoʻoheheʻe wela, he kiʻekiʻe ke kumukūʻai mold, ʻoi aku ka paʻakikī o ke kaʻina hana, a hiki ke hoʻomākaukau ʻia nā ʻāpana ʻano maʻalahi wale nō, e hopena i ka hana haʻahaʻa haʻahaʻa, e kaupalena ana i kāna noi nui.
2. ʻO ka hoʻoheheʻe ʻana i ka lewa: ʻO ka sintering kaomi ʻana i ke aniani ke kaʻina o ka densification sintering o ka silicon carbide ma ka hoʻomehana ʻana iā 2000-2150 ℃ ma lalo o ke kaomi o ka lewa a me nā kūlana o ka lewa inert, ma ka hoʻohui ʻana i nā mea kōkua sintering kūpono. Hoʻokaʻawale ʻia i ʻelua kaʻina: solid-state sintering a me ka wai-phase sintering. Hiki i ka sintering pae paʻa ke kiʻekiʻe kiʻekiʻe o ka carbide silika, me ka ʻole o ke aniani ma waena o nā kristal, a me nā waiwai mechanical kiʻekiʻe; Loaʻa ka maikaʻi o ka sintering phase wai i ka haʻahaʻa haʻahaʻa haʻahaʻa, ka liʻiliʻi o ka palaoa, a me ka hoʻomaikaʻi ʻana i ka ikaika wili a me ka paʻakikī o ka haki. ʻAʻohe palena o ke ʻano o ka huahana a me ka nui o ka hoʻoheheʻe ʻana i ka lewa, nā kumukūʻai haʻahaʻa haʻahaʻa, a me nā waiwai waiwai piha maikaʻi, akā kiʻekiʻe ke kiʻekiʻe o ka sintering a kiʻekiʻe ka hoʻohana ʻana i ka ikehu.
3. ʻO ka hoʻopaʻa ʻana i ka pane: Ua noi mua ʻia ʻo Reaction sintered silicon carbide e P. Popper i ka makahiki 1950. ʻO ke kaʻina hana ka hui ʻana i ke kumu kalapona a me ka pauka silicon carbide, a me ka hoʻomākaukau ʻana i ke kino ʻōmaʻomaʻo ma o nā ʻano hana e like me ka hoʻoheheʻe ʻana, kaomi maloʻo, a i ʻole ke kaomi isostatic anuanu. A laila, hoʻomehana ʻia ka billet ma luna o 1500 ℃ ma lalo o ka vacuum a inert ea, a ma ia manawa e hoʻoheheʻe ai ke silikona paʻa i loko o ka silika wai, e hoʻokomo i ka billet i loko o nā pores ma o ka hana capillary. Loaʻa ka ʻilikia wai a i ʻole ka mahu silika i ka hopena kemika me C i loko o ke kino ʻōmaʻomaʻo, a hui pū ka in-situ i hana ʻia β - SiC me nā ʻāpana SiC kumu i loko o ke kino ʻōmaʻomaʻo e hana i nā mea hana seramika silicon carbide.
ʻO nā pono o ka Reaction Sintering Silicon Carbide Ceramics
Ke hoʻohālikelike ʻia me nā ʻano hana sintering ʻē aʻe, ʻoi aku ka nui o nā pōmaikaʻi nui o ka reaction sintered silicon carbide ceramics.
1. Haʻahaʻa sintering wela a me ka controllable kumu kūʻai: ʻO ka hopena sintering maʻamau ka mea maʻamau ma mua o ka lewa sintering wela, e hoʻemi nui i ka ikehu a me nā koi hana wela kiʻekiʻe no nā lako sintering. ʻO ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa i nā kumukūʻai mālama no nā mea hana a hoʻemi i ka hoʻohana ʻana i ka ikehu i ka wā o ke kaʻina hana, e hōʻemi pono ana i nā kumukūʻai hana. ʻO kēia ka hopena i loaʻa i nā ceramics silicon carbide nā mea waiwai nui i ka hana nui.
2. Ma kahi kokoke i ka nui o ka ʻupena, kūpono no nā hale paʻakikī: I ka wā o ke kaʻina hana sintering, ʻaʻole hiki ke hoʻemi ʻia ka nui. ʻO kēia hiʻohiʻona he mea kūpono ia no ka hoʻomākaukau ʻana i nā mea hoʻolālā paʻakikī. Inā paha he ʻāpana mechanical precision a i ʻole nā mea hana ʻoihana nui, hiki i nā seramika silicon carbide ke hoʻokō pololei i nā koi hoʻolālā, e hōʻemi i nā kaʻina hana hope, hoʻomaikaʻi i ka hana hana, a hōʻemi hoʻi i ka poho waiwai a me ka piʻi ʻana o ke kumukūʻai ma muli o ka hana ʻana.
3. Kiʻekiʻe kiʻekiʻe o ka waiwai densification: Ma ka hoʻomalu 'ana i nā kūlana hopena kūpono, reaction sintering hiki ke kiʻekiʻe kiʻekiʻe o ka densification o silicon carbide ceramics. Hāʻawi ke ʻano paʻa i ka waiwai me nā waiwai mechanical maikaʻi loa, e like me ka ikaika kulou kiʻekiʻe a me ka ikaika compressive, e hiki ai iā ia ke mālama i ka kūpaʻa o ka hale ma lalo o nā ikaika o waho. I ka manawa like, hoʻomaikaʻi ka ʻōnaehana paʻa i ka pale ʻana a me ka pale ʻana i ka corrosion o ka mea, e ʻae iā ia e hana paʻa i nā wahi hana paʻakikī a hoʻonui i kona ola lawelawe.
4. Paʻa kemika maikaʻi: He kūʻē maikaʻi nā ʻakika ikaika a me nā metala i hoʻoheheʻe ʻia nā seramika silicon carbide. I nā ʻoihana e like me ke kemika a me ka metallurgical, pono e hoʻopili pinepine nā mea hana me nā ʻano media corrosive. Hiki i ka Reaction sintered silicon carbide ceramics ke pale maikaʻi i ka erosion o kēia mau media, e hōʻoia i ka hana maʻamau o nā mea hana, hoʻemi i ka mālama a me nā kumukūʻai hoʻololi, a hoʻomaikaʻi i ka hoʻomau a me ka paʻa.
Hoʻohana nui ʻia ma nā ʻano āpau
Me kēia mau pōmaikaʻi, ua hoʻohana nui ʻia nā seramika silicon carbide reaction ma nā ʻano he nui. Ma ke kahua o nā mea hana kiln kiʻekiʻe, hiki iā ia ke pale i nā wahi wela kiʻekiʻe a hōʻoia i ka hana pono o nā kiln; I nā mea hoʻololi wela, ʻo kā lākou conductivity thermal maikaʻi loa a me ka pale ʻana i ka corrosion e hoʻolilo iā lākou i mea koho maikaʻi loa; I nā lako palekana kaiapuni e like me nā desulfurization nozzles, hiki iā ia ke pale i ka erosion o ka media corrosive a hōʻoia i ka hana paʻa lōʻihi o nā mea hana. Eia kekahi, ʻo ka reaction sintered silicon carbide ceramics kekahi hana koʻikoʻi i nā kula kiʻekiʻe e like me ka photovoltaics a me ka aerospace.
He kūlana koʻikoʻi ka Reaction sintered silicon carbide ceramics i ka ʻohana ceramic silicon carbide ma muli o ko lākou mau pono kūʻokoʻa. Me ka hoʻomau mau ʻana o ka ʻenehana a me ka hoʻomau mau ʻana o nā kaʻina hana, ua manaʻo ʻia e hōʻike ana nā seramika silicon carbide sintered i kā lākou hana maikaʻi loa i nā kula hou aku, e hāʻawi ana i ke kākoʻo ikaika no ka hoʻomohala ʻana i nā ʻoihana like ʻole.
Ka manawa hoʻouna: Jun-13-2025