ʻO kahi pūhui non-metallic i haku ʻia me ke kilikaka a me ka nitrogen, silicon nitride (Si3N4) kekahi mea hana seramika kiʻekiʻe loa me ka hui ʻana o ka mechanical, thermal, a me ka uila. Hoʻohui ʻia, i hoʻohālikelike ʻia me ka hapa nui o nā seramika ʻē aʻe, he seramika hana kiʻekiʻe me kahi koena hoʻonui wela haʻahaʻa e hāʻawi ana i ke kūpaʻa haʻalulu wela maikaʻi loa.
Nā hiʻohiʻona
Ma muli o ka haʻahaʻa haʻahaʻa hoʻonui hoʻonui ʻia, he kiʻekiʻe kiʻekiʻe ka haʻalulu wela a me ka paʻakikī haʻihaʻi maikaʻi. Paʻa nā mea hana Si3N4 i nā hopena a me nā haʻalulu. Hiki i kēia mau mea hana ke ʻae i nā mahana hana a hiki i ka 1400 °C a kū i nā kemika, nā hopena corrosive, a me nā metala hoʻoheheʻe ʻia e like me ke alumini, a me nā ʻakika a me nā hopena alkaline. ʻO kekahi hiʻohiʻona kona haʻahaʻa haʻahaʻa. He haʻahaʻa haʻahaʻa o 3.2 a 3.3 g/cm3, ʻaneʻane māmā e like me ke alumini (2.7 g/cm3), a he ≥900 MPa kona ikaika piʻi.
Eia kekahi, hōʻike ʻia ʻo Si3N4 e ke kūpaʻa kiʻekiʻe i ka ʻaʻahu a ʻoi aku ma mua o nā waiwai wela kiʻekiʻe o ka hapa nui o nā metala, e like me ka ikaika kiʻekiʻe a me ke kūpaʻa kolo. Hāʻawi ia i kahi hui maikaʻi o ka creep and oxidation resistance a ʻoi aku ka maikaʻi o ka hiki ke wela o ka hapa nui o nā metala. Mahalo i kona haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa a me ke kūpaʻa paʻa paʻa, hiki iā ia ke pale i nā kūlana paʻakikī loa i nā noi ʻoihana koi. Eia kekahi, ʻo ka silicon nitride kahi koho maikaʻi loa ke koi ʻia nā mana kiʻekiʻe a me nā haʻahaʻa haʻahaʻa.
Waiwai
● Kiʻekiʻe haʻi paʻakikī
● ikaika flexural maikaʻi
● Haʻahaʻa haʻahaʻa loa
● Kupaianaha ikaika i ka ha’alulu wela
● Kiʻekiʻe hana wela ma oxidizing ea
Hana Hana
ʻO nā kaʻina hana ʻelima i hoʻohana ʻia no ka hana ʻana i ka nitride silicon—alakaʻi i nā mea hana a me nā noi ʻokoʻa iki.
SRBSN (rection-bonded silicon nitride)
GPSN (koe kinoea nitride sintered silicon nitride)
HPSN (silicon nitride i kaomi wela)
HIP-SN (nitride silika i kaomi isostatically wela)
RBSN (rection-bonded silicon nitride)
Ma waena o kēia mau mea ʻelima, ʻo GPSN ke ʻano hana i hoʻohana pinepine ʻia.
Nā Laʻana Hoʻohana
Poepoe a me na mea olokaa no ka malamalama
Ma muli o ko lākou paʻakikī haʻihaʻi nui a me nā waiwai tribological maikaʻi, ua kūpono nā seramika silicon nitride no ka hoʻohana ʻana e like me nā pōpō a me nā mea ʻōwili no ka māmā, nā bearings pololei loa, nā mea hana seramika kaumaha, a me nā ʻāpana kaʻa koʻikoʻi. Hoʻohui ʻia, hoʻohana ʻia nā ʻenehana welding i nā mea 'ikaika i ka haʻalulu wela a me ke kūpaʻa wela kiʻekiʻe.
Nā mea hoʻohana wela kiʻekiʻe
Eia kekahi, ua hoʻohana lōʻihi ʻia i nā noi wela kiʻekiʻe. ʻO ka ʻoiaʻiʻo ʻo ia kekahi o nā mea liʻiliʻi monolithic e hiki ke kū i ka haʻalulu wela a me nā ʻanuʻu wela i hana ʻia e nā mīkini rocket hydrogen/oxygen.
ʻOihana Kaʻa
I kēia manawa, hoʻohana nui ʻia ka mea silicon nitride i ka ʻoihana kaʻa i nā noi no nā ʻāpana ʻenekini a me nā ʻāpana mea ʻenehana, e like me nā turbochargers no ka inertia haʻahaʻa a me ka hoʻemi ʻana o ka mīkini lag a me ka hoʻokuʻu ʻana, nā kukui uila no ka hoʻomaka wikiwiki ʻana, nā kīwī hoʻokele kinoea hoʻopau no ka hoʻonui ʻana i ka wikiwiki, a me nā pale lima rocker no nā mīkini kinoea e hoʻohaʻahaʻa i ka lole.
ʻOihana uila
Ma muli o kāna mau waiwai uila, i nā noi microelectronics, hoʻohana nui ʻia ka silicon nitride ma ke ʻano he insulator a me ka pale kemika i ka hana ʻana o nā kaʻa hoʻohui no ka pale palekana o nā mea hana. Hoʻohana ʻia ʻo Silicon nitride ma ke ʻano he papa passivation me kahi pale diffusion kiʻekiʻe e kūʻē i nā ion sodium a me ka wai, ʻelua mau kumu nui o ka corrosion a me ka paʻa ʻole o ka microelectronics. I loko o nā capacitors no nā mea hoʻohālike, hoʻohana ʻia ka mea ma ke ʻano he insulator uila ma waena o nā papa polysilicon.
Ka hopena
ʻO ka silikoni nitride ceramics he mau mea pono. He mau hiʻohiʻona kūʻokoʻa ko kēlā me kēia ʻano ʻano ceramika e hoʻohana pono ai i nā ʻāpana like ʻole. ʻO ka hoʻomaopopo ʻana i nā ʻano like ʻole o ka silicon nitride ceramics e maʻalahi ke koho i ka mea maikaʻi loa no kahi noi i hāʻawi ʻia.
