Hana ʻana i nā ʻano hana no ka Silicon Carbide Ceramics

Hoʻokumu ʻana i nā ʻano hana no ka Silicon Carbide Ceramics: He Manaʻo Kūlohelohe

ʻO ke ʻano kristal kū hoʻokahi a me nā waiwai o ka silicon carbide ceramics e kōkua i kāna mau waiwai maikaʻi. Loaʻa iā lākou ka ikaika maikaʻi loa, ka paʻakikī kiʻekiʻe loa, ke kūpaʻa maikaʻi loa i ka ʻaʻahu, ka pale ʻana i ka corrosion, ka conductivity thermal kiʻekiʻe a me ke kūpaʻa haʻalulu maikaʻi. Hana kēia mau waiwai i ka silicon carbide ceramics i kūpono no nā noi ballistic.

ʻO ka hana ʻana o ka silicon carbide ceramics e hoʻohana maʻamau i nā ʻano aʻe:

1. ʻO ka hoʻoheheʻe ʻana: ʻO ka hoʻoheheʻe ʻana he mea hoʻohana nui ʻia no ka hana ʻana i nā ʻāpana pale pale silicon carbide. He maʻalahi ke kaʻina hana, maʻalahi ka hana, kiʻekiʻe i ka maikaʻi a kūpono no ka hana mau.

2. ʻO ka hoʻoheheʻe ʻana: He hiki ke hoʻololi maikaʻi ʻia ka hoʻoheheʻe ʻana a hiki ke hana i nā ʻano paʻakikī a me nā hale. ʻOi aku ka maikaʻi o kēia ʻano hana i ka wā e hana ai i nā ʻāpana seramika silicon carbide.

3. ʻO ke kaomi isostatic anuanu: ʻO ke kaomi isostatic anuanu e pili ana i ka hoʻohanaʻana i ka ikaika likeʻole i ke kino'ōmaʻomaʻo, e hopena i ka mahele likeʻole. Hoʻomaikaʻi nui kēia ʻenehana i ka hana huahana a kūpono no ka hana ʻana i nā ceramics silicon carbide kiʻekiʻe.

4. ʻO ka hoʻoheheʻe ʻia ʻana o ka gel: He ʻano hou ka hoʻoheheʻe ʻia ʻana o ka gel ma kahi kokoke i ke ʻano hana hoʻoheheʻe nui. ʻO ke kino ʻōmaʻomaʻo i hana ʻia he ʻano like ʻole a me ka ikaika kiʻekiʻe. Hiki ke hana ʻia nā ʻāpana seramika i loaʻa e nā mīkini like ʻole, e hōʻemi ana i ke kumukūʻai o ka hana ma hope o ka sintering. He kūpono loa ka hoʻoheheʻe ʻana o ka gel no ka hana ʻana i nā seramika silicon carbide me nā hale paʻakikī.

Ma ka hoʻohana ʻana i kēia mau ʻano hana, hiki i nā mea hana ke kiʻi i nā seramika silicon carbide kiʻekiʻe me nā waiwai mechanical a me ballistic. ʻO ka hiki ke hana i ka silicon carbide ceramics i loko o nā ʻano like ʻole a me nā ʻano hana e hiki ai i ka hana maʻamau a me ka optimization e hoʻokō i nā koi kikoʻī o nā noi like ʻole.

Eia kekahi, hoʻonui ka maikaʻi o ke kumu kūʻai o ka silicon carbide ceramics i kona nani ma ke ʻano he kiʻekiʻe-hana ballistic-resistant material. ʻO kēia hui pū ʻana o nā waiwai i makemake ʻia a me nā kumukūʻai kūpono e hoʻolilo i nā seramika silicon carbide i mea hoʻokūkū ikaika i loko o ke keʻena pale kino.

I ka hopena, ʻo ka silicon carbide ceramics ka mea alakaʻi ballistic ma muli o kā lākou mau waiwai maikaʻi a me nā ʻano hana hoʻoheheʻe versatile. ʻO ke ʻano aniani, ka ikaika, ka paʻakikī, ke kūpaʻa ʻana, ka pale ʻana i ka corrosion, ka conductivity thermal a me ke kūpaʻa haʻalulu wela o ka silicon carbide ceramics e lilo lākou i koho maikaʻi no nā mea hana a me nā mea noiʻi. Me nā ʻano hana hana like ʻole, hiki i nā mea hana ke hana i nā seramika silicon carbide e hoʻokō i nā noi kikoʻī, e hōʻoia i ka hana maikaʻi loa a me ka pale. Ke hoʻohiki nei ka wā e hiki mai ana o ka silicon carbide ceramics i ko lākou hoʻomau ʻana e hoʻomohala a hana maikaʻi i ke kahua o nā mea ballistic.

E pili ana i ka pale ʻana i ka ballistic, ʻo ka hui pū ʻana o nā ʻāpana polyethylene a me nā mea hoʻokomo seramika ua hōʻoia maikaʻi loa. Ma waena o nā koho seramika like ʻole i loaʻa, ua hoʻokipa nui ka silicon carbide i ka nānā ʻana ma ka home a ma waho. I nā makahiki i hala iho nei, ke ʻimi nei nā mea noiʻi a me nā mea hana i ka hiki o ka silicon carbide ceramics ma ke ʻano he kiʻekiʻe o ka ballistic-resistant material ma muli o kāna mau waiwai maikaʻi a me ke kumukūʻai haʻahaʻa.

ʻO ka carbide silikoni kahi hui i hana ʻia e ka hoʻopaʻa ʻana i nā tetrahedrons Si-C, a he ʻelua mau ʻano aniani, α a me β. Ma kahi mahana sintering ma lalo o 1600 ° C, loaʻa ka silicon carbide ma ke ʻano o β-SiC, a i ka wā i ʻoi aku ka mahana ma mua o 1600 ° C, hoʻololi ka silicon carbide i α-SiC. He ikaika loa ka paʻa covalent o ka α-silicon carbide, a hiki iā ia ke mālama i kahi paʻa ikaika kiʻekiʻe a hiki i nā wela kiʻekiʻe.