MEA

ʻIke ʻia ʻo Silicon carbide (SiC) ʻo carborundum, i hana ʻia me ke one quartz, petroleum coke (a i ʻole coke lanahu), nā ʻāpana lāʻau (pono e hoʻohui ʻia i ka wā e hana ai i ka silicon carbide ʻōmaʻomaʻo) a pēlā aku. Loaʻa iā Silicon carbide kahi mineral kakaikahi ma ke ʻano, ʻo mulberry. I kēia manawa, ʻo C, N, B a me nā mea ʻē aʻe ʻaʻole oxide kiʻekiʻe refractory maka, ʻo silicon carbide kekahi o nā mea i hoʻohana nui ʻia a hoʻokele waiwai, hiki ke kapa ʻia he one kila gula a i ʻole one refractory. I kēia manawa, ua māhele ʻia ka hana ʻoihana Kina o ka silicon carbide i ka silicon carbide ʻeleʻele a me ka silicon carbide ʻōmaʻomaʻo, ʻo ia mau mea ʻelua he mau kristal hexagonal me ka hapa o 3.20 ~ 3.25 a me ka microhardness o 2840 ~ 3320kg/m².

Hoʻokaʻawale ʻia nā huahana Silicon carbide i nā ʻano he nui e like me ke kaiapuni noi like ʻole. Hoʻohana nui ʻia ia ma ke ʻano mechanical. No ka laʻana, ʻo ka silicon carbide kahi mea kūpono no ka sila mechanical silicon carbide ma muli o kona kūpaʻa maikaʻi i ka palaho kemika, ikaika kiʻekiʻe, paʻakikī kiʻekiʻe, kūpaʻa maikaʻi i ka ʻaʻahu, ka coefficient friction liʻiliʻi a me ke kūpaʻa wela kiʻekiʻe.

Hiki ke hoʻokaʻawale ʻia nā apo sila SIC i ke apo paʻa, ke apo neʻe, ke apo pālahalaha a pēlā aku. Hiki ke hana ʻia ke silicon SiC i nā huahana carbide like ʻole, e like me ke apo rotary silicon carbide, ka noho paʻa silicon carbide, ka ulu lāʻau silicon carbide, a pēlā aku, e like me nā koi kūikawā o nā mea kūʻai aku. Hiki ke hoʻohana pū ʻia me ka mea graphite, a ʻoi aku ka liʻiliʻi o kona coefficient friction ma mua o ka alumina ceramic a me ka alloy paʻakikī, no laila hiki ke hoʻohana ʻia i ka waiwai PV kiʻekiʻe, ʻoi aku hoʻi i ke kūlana o ka waikawa ikaika a me ka alkali ikaika.

ʻO ka hoʻemi ʻia ʻana o ka friction o SIC kekahi o nā pono nui o ka hoʻohana ʻana iā ia i nā sila mechanical. No laila, hiki i ka SIC ke kū i ka ʻaʻahu a me ka haehae ʻoi aku ka maikaʻi ma mua o nā mea ʻē aʻe, e hoʻolōʻihi ana i ke ola o ke sila. Eia kekahi, ʻo ka hoʻemi ʻia ʻana o ka friction o SIC e hōʻemi ana i ke koi no ka lubrication. ʻO ka nele o ka lubrication e hōʻemi ana i ka hiki ke haumia a me ka pala, e hoʻomaikaʻi ana i ka pono a me ka hilinaʻi.

Loaʻa iā SIC kahi kūpaʻa maikaʻi loa i ka ʻaʻahu. Hōʻike kēia e hiki iā ia ke hoʻomanawanui i ka hoʻohana mau ʻana me ka ʻole o ka pala a haki paha. ʻO kēia ka mea kūpono loa no nā hoʻohana e koi ana i kahi kiʻekiʻe o ka hilinaʻi a me ke kūpaʻa.

Hiki ke hoʻopili hou ʻia a hoʻowali ʻia i hiki ke hoʻoponopono hou ʻia kahi sila i nā manawa he nui i kona ola. Hoʻohana nui ʻia ia ma ke ʻano mechanical, e like me nā sila mechanical no kona kūpaʻa maikaʻi i ka palaho kemika, ikaika kiʻekiʻe, paʻakikī kiʻekiʻe, kūpaʻa maikaʻi i ka ʻaʻahu ʻana, ka coefficient friction liʻiliʻi a me ke kūpaʻa wela kiʻekiʻe.

Ke hoʻohana ʻia no nā maka sila mechanical, hopena ka silicon carbide i ka hana maikaʻi, hoʻonui i ke ola sila, hoʻemi i nā kumukūʻai mālama, a me nā kumukūʻai holo haʻahaʻa no nā lako wili e like me nā turbines, compressors, a me nā pamu centrifugal. Hiki i ka Silicon carbide ke loaʻa nā waiwai like ʻole ma muli o ke ʻano o ka hana ʻana. Hoʻokumu ʻia ka silicon carbide i hoʻopaʻa ʻia ma ka hoʻopaʻa ʻana i nā ʻāpana silicon carbide kekahi i kekahi i loko o kahi kaʻina hana.

ʻAʻole kēia kaʻina hana e hoʻopilikia nui i ka hapa nui o nā waiwai kino a me ka wela o ka mea, akā naʻe, kaupalena ia i ke kūpaʻa kemika o ka mea. ʻO nā kemika maʻamau i pilikia, ʻo ia nā caustics (a me nā kemika pH kiʻekiʻe ʻē aʻe) a me nā waikawa ikaika, a no laila, ʻaʻole pono e hoʻohana ʻia ka silicon carbide i hoʻopaʻa ʻia me kēia mau noi.

Hoʻokomo ʻia ka hopena-sinteredsilicon carbide. I loko o ia mea, ua hoʻopiha ʻia nā pores o ka mea SIC mua i ke kaʻina hana o ka infiltration ma ke puhi ʻana i ka silicon metala, no laila e ʻike ʻia ai ka SiC lua a loaʻa i ka mea nā waiwai mechanical kūikawā, e lilo i mea pale i ke komo ʻana. Ma muli o kona emi iki ʻana, hiki ke hoʻohana ʻia i ka hana ʻana o nā ʻāpana nui a paʻakikī me nā hoʻomanawanui kokoke. Eia nō naʻe, ʻo ka nui o ka silicon e kaupalena i ka mahana hana kiʻekiʻe loa i 1,350 °C, ua kaupalena ʻia ke kūʻē kemika ma kahi o pH 10. ʻAʻole ʻōlelo ʻia ka mea no ka hoʻohana ʻana i nā wahi alkaline hoʻouka kaua.

I hoʻopaʻa ʻiaLoaʻa ka silicon carbide ma ka sintering ʻana i kahi granulate SIC maikaʻi loa i hoʻopaʻa mua ʻia ma ka mahana o 2000 °C e hana i nā pilina ikaika ma waena o nā ʻāpana o ka mea.
ʻO ka mua, mānoanoa ka lattice, a laila emi ka porosity, a ʻo ka hope loa nā pilina ma waena o nā grains sinter. I ke kaʻina hana o ia ʻano hana, loaʻa kahi emi nui o ka huahana - ma kahi o 20%.
Apo sila SSIC he kūpaʻa i nā kemika āpau. ʻOiai ʻaʻohe silicon metala i loko o kona ʻano, hiki ke hoʻohana ʻia i nā mahana a hiki i 1600C me ka ʻole o ka hoʻopilikia ʻana i kona ikaika