Silika carbide (SiC) seramikaua lilo i mea koʻikoʻi ma ke kahua o nā seramika hoʻolālā kiʻekiʻe ma muli o kā lākou mea hoʻonui haʻahaʻa haʻahaʻa haʻahaʻa, kiʻekiʻe thermal conductivity, kiʻekiʻe paʻakikī, a me ka maikaʻi o ka wela a me ka paʻa. Hoʻohana nui ʻia lākou i nā kahua koʻikoʻi e like me ka aerospace, ka ikehu nuklea, ka pūʻali koa, a me nā semiconductors.
Eia nō naʻe, ʻo nā paʻa covalent ikaika loa a me ka coefficient diffusion haʻahaʻa o SiC e paʻakikī i kona hoʻopaʻa ʻana. I kēia hopena, ua hoʻomohala ka ʻoihana i nā ʻenehana sintering like ʻole, a ʻo nā ceramics SiC i hoʻomākaukau ʻia e nā ʻenehana like ʻole he ʻokoʻa nui i ka microstructure, waiwai, a me nā hiʻohiʻona noi. Eia ka nānā ʻana i nā hiʻohiʻona kumu o ʻelima mau mea koʻikoʻi silicon carbide ceramics.
1. ʻAʻole kaomi ʻia ʻo SiC seramika (S-SiC)
ʻO nā pono kumu: He kūpono no nā kaʻina hana hoʻoheheʻe he nui, haʻahaʻa haʻahaʻa, ʻaʻole i kaupalena ʻia e ke ʻano a me ka nui, ʻo ia ke ʻano sintering maʻalahi e hoʻokō i ka hana nui. Ma ka hoʻohui ʻana i ka boron a me ke kalapona i ka β - SiC e loaʻa ana ka nui o ka oxygen a me ka sintering ʻana ma lalo o kahi ea inert ma kahi o 2000 ℃, hiki ke loaʻa kahi kino sintered me ka 98% theoretical density. ʻElua mau kaʻina hana: ka pae paʻa a me ka pae wai. ʻO ka mua he kiʻekiʻe kiʻekiʻe a me ka maʻemaʻe, a me ka conductivity thermal kiʻekiʻe a me ka ikaika wela kiʻekiʻe.
Nā noi maʻamau: ʻO ka hana nui ʻana o nā apo hoʻopaʻa paʻa a me ka corrosion-resistant a me nā bearings sliding; Ma muli o kona paʻakikī kiʻekiʻe, haʻahaʻa haʻahaʻa haʻahaʻa, a me ka hana ballistic maikaʻi, hoʻohana nui ʻia ia e like me ka pale pale pale no nā kaʻa a me nā moku, a me ka pale ʻana i nā palekana kīwila a me nā kaʻa lawe kālā. ʻOi aku ka maikaʻi o kāna kūʻē nui ma mua o nā seramika SiC maʻamau, a ʻo ka wahi haʻihaʻi o ka pale pale māmā cylindrical hiki ke piʻi ma luna o 65 tons.
2. ʻO nā seramika SiC i hoʻopaʻa ʻia (RB SiC)
Nā pōmaikaʻi kumu: ʻO ka hana mechanical maikaʻi loa, ka ikaika kiʻekiʻe, ka pale ʻana i ka corrosion, a me ka pale ʻana i ka oxidation; Haʻahaʻa sintering wela a me ke kumu kūʻai, hiki ke hana kokoke i ka nui upena. ʻO ke kaʻina hana ka hui ʻana i kahi kumu kalapona me ka pauka SiC e hana i kahi billet. Ma nā wela kiʻekiʻe, hoʻoheheʻe ka silikoni hoʻoheheʻe ʻia i ka billet a hoʻopili me ke kalapona e hana i ka β - SiC, e hui pū me ka α - SiC kumu a hoʻopiha i nā pores. He liʻiliʻi ka hoʻololi ʻana o ka nui i ka wā sintering, kūpono ia no ka hana ʻana o nā huahana paʻakikī.
Nā mea hoʻohana maʻamau: ʻO nā lako kiln wela kiʻekiʻe, nā paipu uila, nā mea hoʻololi wela, nā nozzles desulfurization; Ma muli o kona haʻahaʻa haʻahaʻa hoʻonui hoʻonui wela, kiʻekiʻe elastic modulus, a kokoke i nā hiʻohiʻona hoʻokumu ʻana i ka ʻupena, ua lilo ia i mea kūpono no nā mea hoʻonaninani ākea; Hiki iā ia ke hoʻololi i ke aniani quartz ma ke ʻano he mea kākoʻo no nā paipu uila a me nā lako hana semiconductor chip.
3. ʻO nā seramika SiC i hoʻopaʻa ʻia me ka wela (HP SiC)
ʻO ka pono kumu: Synchronous sintering ma lalo o ke kiʻekiʻe wela a me ke kiʻekiʻe kiʻekiʻe, aia ka pauka i kahi kūlana thermoplastic, kahi kūpono i ke kaʻina hana hoʻololi. Hiki iā ia ke hana i nā huahana me nā huaʻai maikaʻi, kiʻekiʻe kiʻekiʻe, a me nā waiwai mechanical maikaʻi i nā haʻahaʻa haʻahaʻa a i ka manawa pōkole, a hiki ke hoʻokō i ka piha piha a kokoke i ke kūlana sintering maʻemaʻe.
Hoʻohana maʻamau: Ua hoʻohana mua ʻia e like me nā ʻaʻahu pale pōkā no nā hui helicopter US i ka wā o ke Kaua Vietnam, ua pani ʻia ka mākeke pale kaua e ka boron carbide wela; I kēia manawa, hoʻohana nui ʻia ia i nā hiʻohiʻona kiʻekiʻe o ka waiwai, e like me nā māla me nā koi kiʻekiʻe loa no ka hoʻomalu ʻana, ka maʻemaʻe, a me ka densification, a me nā kahua ʻoihana pale a me ka nuklea.
4. ʻO nā seramika SiC i hana hou ʻia (R-SiC)
Pono pono: ʻAʻole pono e hoʻohui i nā mea kōkua sintering, he ala maʻamau ia no ka hoʻomākaukau ʻana i ka maʻemaʻe kiʻekiʻe kiʻekiʻe a me nā polokalamu SiC nui. Hoʻopili ke kaʻina hana i ka hui ʻana i nā pauka SiC koʻikoʻi a me ka maikaʻi i ka hoʻohālikelike ʻia a hoʻokumu ʻia iā lākou, sintering iā lākou i kahi lewa inert ma 2200 ~ 2450 ℃. E hoʻoheheʻe ʻia nā ʻāpana maikaʻi a hoʻopaʻa ʻia i ka hui ʻana ma waena o nā ʻāpana koʻikoʻi e hana i nā seramika, me ka lua o ka paʻakikī i ke daimana. Mālama ʻo SiC i ka ikaika kiʻekiʻe-kiʻekiʻe, ka pale ʻana i ka corrosion, ka pale ʻana i ka oxidation, a me ke kūpaʻa haʻalulu wela.
Nā mea hoʻohana maʻamau: Nā lako kiln wela kiʻekiʻe, nā mea hoʻololi wela, nā nozzles puhi; I ka aerospace a me ka pūʻali koa, hoʻohana ʻia ia e hana i nā ʻāpana hoʻolālā spacecraft e like me nā mīkini, nā huelo huelo, a me nā fuselage, hiki ke hoʻomaikaʻi i ka hana o nā mea hana a me ke ola lawelawe.
5. ʻO nā seramika SiC i komo i loko o ka silikoni (SiSiC)
ʻO nā pono kumu: ʻO ka mea kūpono loa no ka hana ʻoihana, me ka manawa sintering pōkole, haʻahaʻa haʻahaʻa, piha piha a me ka deformed ʻole, i haku ʻia me ka SiC matrix a me ka infiltrated Si phase, i māhele ʻia i ʻelua mau kaʻina: infiltration wai a me ka infiltration kinoea. ʻOi aku ka nui o ke kumukūʻai akā ʻoi aku ka maikaʻi o ka nui a me ka like ʻole o ka silika manuahi.
ʻO nā noi maʻamau: ʻo ka porosity haʻahaʻa, ka airtightness maikaʻi, a me ke kūpaʻa haʻahaʻa e hoʻopau i ka uila static, kūpono no ka hana ʻana i nā ʻāpana nui, paʻakikī a hollow paha, hoʻohana nui ʻia i nā lako hana semiconductor; Ma muli o kāna modulus elastic kiʻekiʻe, māmā, ikaika kiʻekiʻe, a me ka ea maikaʻi loa, ʻo ia ka mea i makemake nui ʻia i ka hana aerospace, hiki ke kū i nā ukana i nā wahi ākea a hōʻoia i ka pololei o nā lako a me ka palekana.
Ka manawa hoʻouna: Sep-02-2025