Ma ke kahua ākea o ka ʻepekema mea, ua lilo nā keramika silicon carbide i "aloha" o nā kahua ʻenehana kiʻekiʻe he nui ma muli o ko lākou mau waiwai maikaʻi loa 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 a i nā mīkini ʻoihana, he kuleana koʻikoʻi nā keramika silicon carbide. I ke kaʻina hana hoʻomākaukau o nā keramika silicon carbide, ʻo ke ʻano sintering ke kumu nui e hoʻoholo ai i kona mau waiwai a me ka laulā o ka noi. I kēia lā, e luʻu mākou i loko o ke kaʻina sintering o ka silicon carbide a e kālele ana i ka ʻimi ʻana i nā pono kūikawā o ka hopena sintered.nā keramika silicon carbide.
Nā ʻano hana sintering maʻamau no ka silicon carbide
Aia kekahi mau ʻano sintering like ʻole no ka silicon carbide, kēlā me kēia me kona mau kumumanaʻo ponoʻī a me nā ʻano.
1. Sintering kaomi wela: ʻO kēia ʻano sintering e pili ana i ke kau ʻana i ka pauka silicon carbide i loko o kahi ʻōmole, e hoʻopili ana i kahi kaomi i ka wā e hoʻomehana ana, e hoʻopau i nā kaʻina hana hoʻoheheʻe a me ka sintering i ka manawa like. Hiki i ka sintering kaomi wela ke loaʻa nā keramika silicon carbide mānoanoa ma nā mahana haʻahaʻa a i loko o kahi manawa pōkole, me ka nui o ka palaoa maikaʻi a me nā waiwai mechanical maikaʻi. Eia nō naʻe, he paʻakikī nā lako sintering kaomi wela, kiʻekiʻe ke kumukūʻai o ka ʻōmole, paʻakikī nā koi hana hana, a hiki ke hoʻomākaukau ʻia nā ʻāpana maʻalahi wale nō, e hopena ana i ka pono hana haʻahaʻa, kahi e kaupalena ai i kāna noi nui.
2. Sintering kaomi lewa: ʻO ka sintering kaomi lewa ke kaʻina hana o ka sintering densification o ka silicon carbide ma ka hoʻomehana ʻana iā ia i 2000-2150 ℃ ma lalo o ke kaomi lewa a me nā kūlana lewa inert, ma ka hoʻohui ʻana i nā mea kōkua sintering kūpono. Ua māhele ʻia i ʻelua mau kaʻina hana: sintering mokuʻāina paʻa a me ka sintering pae wai. Hiki i ka sintering pae paʻa ke hoʻokō i ka nui o ka silicon carbide, me ka ʻole o ka pae aniani ma waena o nā kristal, a me nā waiwai mechanical wela kiʻekiʻe maikaʻi loa; Loaʻa i ka sintering pae wai nā pono o ka mahana sintering haʻahaʻa, ka nui o ka palaoa liʻiliʻi, a me ka hoʻomaikaʻi ʻana i ka ikaika kūlou mea a me ka paʻakikī haki. ʻAʻohe palena o ka sintering kaomi lewa i ke ʻano a me ka nui o ka huahana, nā kumukūʻai hana haʻahaʻa, a me nā waiwai mea piha maikaʻi loa, akā kiʻekiʻe ka mahana sintering a kiʻekiʻe ka hoʻohana ʻana i ka ikehu.
3. Hana sintering: Ua hāpai mua ʻia ka silicon carbide sintered reaction e P. Popper i nā makahiki 1950. Pili ke kaʻina hana i ka hoʻohuihui 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 i ka injection, 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 i ʻole ka lewa inert, ma ia manawa e heheʻe ai ka silicon paʻa i loko o ka silicon wai, kahi e komo ai i loko o ka billet i loaʻa nā pores ma o ka hana capillary. Hoʻopilikia ka silicon wai a i ʻole ka mahu silicon i kahi hopena kemika me C i loko o ke kino ʻōmaʻomaʻo, a hui pū ka β - SiC i hana ʻia ma kahi me nā ʻāpana SiC mua i loko o ke kino ʻōmaʻomaʻo e hana i nā mea keramika silicon carbide sintered reaction.
Nā Pōmaikaʻi o ka Hana Sintering Silicon Carbide Ceramics
Ke hoʻohālikelike ʻia me nā ʻano hana sintering ʻē aʻe, he nui nā pono koʻikoʻi o nā keramika silicon carbide sintered:
1. Haʻahaʻa ka mahana sintering a me ke kumukūʻai hiki ke kāohi ʻia: ʻOi aku ka haʻahaʻa o ka mahana sintering hopena ma mua o ka mahana sintering lewa, e hōʻemi nui ana i ka hoʻohana ʻana i ka ikehu a me nā koi hana wela kiʻekiʻe no nā lako sintering. ʻO ka mahana sintering haʻahaʻa ke ʻano o ka hoʻemi ʻana i nā kumukūʻai mālama no nā lako a me ka hoʻemi ʻana 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 mea e loaʻa ai nā pono waiwai koʻikoʻi o nā keramika silicon carbide sintered i ka hana nui.
2. Hoʻokumu kokoke i ka nui o ka ʻupena, kūpono no nā ʻano paʻakikī: I ka wā o ke kaʻina hana sintering, ʻaʻole i emi iki ka nui o ka mea. ʻO kēia ʻano e kūpono loa ai no ka hoʻomākaukau ʻana i nā ʻāpana kūkulu nui a paʻakikī. Inā he mau ʻāpana mīkini pololei a i ʻole nā ʻāpana lako ʻoihana nui, hiki i nā keramika silicon carbide sintered reaction ke hoʻokō pono i nā koi hoʻolālā, hoʻemi i nā ʻanuʻu hana ma hope, hoʻomaikaʻi i ka pono hana, a hoʻemi pū i ka pohō o nā mea a me ka piʻi ʻana o ke kumukūʻai i hoʻokumu ʻia e ka hana ʻana.
3. Ke kiʻekiʻe o ka densification mea: Ma ka hoʻomalu pono ʻana i nā kūlana hopena, hiki i ka sintering hopena ke hoʻokō i kahi kiʻekiʻe o ka densification o nā keramika silicon carbide. Hāʻawi ka ʻano paʻa i ka mea me nā waiwai mechanical maikaʻi loa, e like me ka ikaika kūlou kiʻekiʻe a me ka ikaika compressive, e hiki ai iā ia ke mālama i ka pono o ke ʻano ma lalo o nā mana o waho. I ka manawa like, hoʻonui pū ka ʻano paʻa i ke kūpaʻa ʻana i ka ʻaʻahu a me ke kūpaʻa ʻana i ka corrosion o ka mea, e ʻae ana iā ia e hana paʻa i nā wahi hana ʻino a hoʻolōʻihi i kona ola lawelawe.
4. Paʻa kemika maikaʻi: Loaʻa i nā keramika silicon carbide sintered reaction ke kūpaʻa maikaʻi loa i nā waikawa ikaika a me nā metala hoʻoheheʻe ʻia. I nā ʻoihana e like me ke kemika a me ka metallurgical, pono pinepine nā lako e hoʻopili me nā ʻano media corrosive like ʻole. Hiki i nā keramika silicon carbide sintered reaction ke pale aku i ka ʻino ʻana o kēia mau media, e hōʻoia i ka hana maʻamau o nā lako, e hōʻemi i nā kumukūʻai mālama a me ka hoʻololi, a hoʻomaikaʻi i ka hoʻomau a me ke kūpaʻa o ka hana ʻana.
Hoʻohana nui ʻia ma nā ʻano like ʻole
Me kēia mau pono, ua hoʻohana nui ʻia nā keramika silicon carbide sintered reaction ma nā ʻano he nui. Ma ke kahua o nā lako umu wela kiʻekiʻe, hiki iā ia ke kū i nā wahi wela kiʻekiʻe a hōʻoia i ka hana pono o nā umu; I loko o nā mea hoʻololi wela, ʻo ko lākou conductivity thermal maikaʻi loa a me ke kūpaʻa ʻana i ka corrosion e lilo ai lākou i koho mea kūpono; I loko o nā lako palekana kaiapuni e like me nā nozzles desulfurization, hiki iā ia ke kū i ka erosion o nā media corrosive a hōʻoia i ka hana paʻa lōʻihi o nā lako. Eia kekahi, he kuleana koʻikoʻi nō hoʻi nā keramika silicon carbide sintered reaction ma nā ʻano kiʻekiʻe e like me nā photovoltaics a me nā aerospace.
Noho nā keramika silicon carbide sintered i kahi kūlana koʻikoʻi i ka ʻohana keramika silicon carbide ma muli o ko lākou mau pono kūikawā. Me ka holomua mau o ka ʻenehana a me ka hoʻomaikaʻi mau ʻana o nā kaʻina hana, ua manaʻoʻiʻo ʻia e hōʻike nā keramika silicon carbide sintered i kā lākou hana maikaʻi loa ma nā ʻoihana hou aʻe, e hāʻawi ana i ke kākoʻo mea ikaika no ka hoʻomohala ʻana o nā ʻoihana like ʻole.
Ka manawa hoʻouna: Iune-13-2025