Silika carbide keramikakaʻina hana hoʻohālikelike: kaʻina hana sintering a me kona mau pono a me nā hemahema
I ka hana ʻana o ka silicon carbide ceramics, hoʻokahi wale nō loulou i ka hana holoʻokoʻa. ʻO ka Sintering ke kaʻina hana nui e pili pono i ka hana hope a me ka hana o nā seramika. Nui nā ʻano like ʻole o ka sintering silicon carbide ceramics, kēlā me kēia me kona pono ponoʻī a me nā hemahema. Ma kēia pou blog, e ʻimi mākou i ke kaʻina hana sintering o nā silicon carbide ceramics a hoʻohālikelike i nā ʻano like ʻole.
1. ʻO ka hoʻopaʻa ʻana i ka hana:
ʻO ka hoʻopaʻa ʻana ʻana he ʻenehana hana kaulana no ka silika carbide seramika. He mea maʻalahi kēia a me ke kumu kūʻai kokoke i ke kaʻina hana net-to-size. Loaʻa ka Sintering e ka hopena silicidation ma kahi haʻahaʻa haʻahaʻa o 1450 ~ 1600 ° C a me kahi manawa pōkole. Hiki i kēia ala ke hana i nā ʻāpana o ka nui a me ke ʻano paʻakikī. Eia nō naʻe, loaʻa iā ia kona mau hemahema. ʻO ka hopena siliconizing inevitably e alakaʻi i ka 8% ~ 12% manuahi manuahi i loko o ka silicon carbide, e hōʻemi ana i kāna mau waiwai mechanical kiʻekiʻe, ka pale ʻana i ka corrosion, a me ke kūpaʻa oxidation. A ua kaupalena ʻia ka mahana hoʻohana ma lalo o 1350°C.
2. Wela kaomi sintering:
ʻO ka sintering kaomi wela kekahi ʻano hana maʻamau no ka sintering silicon carbide ceramics. Ma kēia ʻano hana, hoʻopiha ʻia ka pauka silicon carbide maloʻo i loko o kahi ʻōpala a hoʻomehana ʻia i ka wā e noi ana i ke kaomi mai kahi kuhikuhi uniaxial. ʻO kēia hoʻomehana hoʻokahi a me ke kaomi e hoʻoikaika i ka diffusion particle, kahe, a me ka hoʻoili nui ʻana, ka hopena i ka silicon carbide ceramics me nā hua maikaʻi, kiʻekiʻe pili pili, a me nā waiwai mechanical maikaʻi loa. Eia naʻe, loaʻa nō hoʻi nā hemahema o ka sintering wela. ʻOi aku ka paʻakikī o ke kaʻina hana a koi aku i nā mea hana a me nā mea hana kiʻekiʻe. He haʻahaʻa ka hana hana a he kiʻekiʻe ke kumukūʻai. Eia kekahi, kūpono wale kēia ala no nā huahana me nā ʻano maʻalahi.
3. Wela isostatic kaomi sintering:
ʻO ka sintering isostatic wela (HIP) kahi ʻenehana e pili ana i ka hana hui ʻana o ka wela kiʻekiʻe a me ke kinoea puʻu kiʻekiʻe isotropically. Hoʻohana ʻia ia no ka sintering a me ka densification o ka pauka ceramic silicon carbide, kino ʻōmaʻomaʻo a i ʻole kino pre-sintered. ʻOiai hiki i ka HIP sintering ke hoʻomaikaʻi i ka hana o ka silicon carbide ceramics, ʻaʻole i hoʻohana nui ʻia i ka hana nui ma muli o ke kaʻina paʻakikī a me ke kumukūʻai kiʻekiʻe.
4. Ka hoʻopaʻa ʻana i ke kaomi ʻole:
ʻO ka sintering pressureless kahi ʻano me ka maikaʻi o ka hana wela kiʻekiʻe, ke kaʻina hana sintering maʻalahi a me ke kumu kūʻai haʻahaʻa o ka silicon carbide ceramics. Hāʻawi ia i nā ʻano hana he nui, kūpono ia no nā ʻano paʻakikī a me nā ʻāpana mānoanoa. He kūpono loa kēia ʻano hana no ka hana ʻoihana nui o nā seramika silika.
I ka hōʻuluʻulu ʻana, ʻo ke kaʻina sintering kahi hana koʻikoʻi i ka hana ʻana o nā seramika SiC. ʻO ke koho o ke ʻano sintering e pili ana i nā mea e like me nā waiwai i makemake ʻia o ka seramika, ka paʻakikī o ke ʻano, ke kumukūʻai hana a me ka pono. Loaʻa i kēlā me kēia ʻano nā pono ponoʻī a me nā hemahema, a he mea nui e noʻonoʻo pono i kēia mau mea e hoʻoholo ai i ke kaʻina sintering kūpono loa no kahi noi.
Ka manawa hoʻouna: ʻAukake-24-2023