ʻO ke kaomi lewa sintered silicon carbide he carbide non-metala me ka silicon a me ke kalapona covalent bond, a ʻo kona paʻakikī ka lua wale nō i ka daimana a me ka boron carbide. ʻO ke ʻano kemika ʻo SiC. ʻAʻohe kala o nā kristal, uliuli a ʻeleʻele ke ʻano i ka wā i oxidized ʻia a i ʻole nā mea haumia. ʻO ka deformation o ka silicon carbide me ke ʻano daimana i kapa ʻia ʻo emery. ʻO ka paʻakikī o ka emery kokoke i ka daimana, kūpaʻa maikaʻi ka thermal, paʻa i ka hydroxy acid aqueous solution a me ka sulfuric acid concentrated, a paʻa ʻole i ka waikawa hui a i ʻole ka phosphoric acid o ka hydrogen acid concentrated a me ka nitric acid. ʻOkoʻa nā alkalis e heheʻe i loko o kahi lewa hakahaka. Ua māhele ʻia i ka silicon carbide synthetic a me ka silicon carbide kūlohelohe. ʻO ka silicon carbide kūlohelohe, i ʻike ʻia ʻo carbonite, loaʻa nui ʻia i ka kimberlite a me ka volcanic amphibolite, akā he liʻiliʻi kona nui a ʻaʻohe waiwai eli.
ʻO ke kaomi lewa ʻoihana sintered silicon carbide he hui pū ʻia o -SiC a me -SiC a loaʻa i ʻelua mau kala: ʻeleʻele a me ka ʻōmaʻomaʻo. ʻAʻohe kala o ka silicon carbide maʻemaʻe, aia nā haumia he ʻeleʻele, ʻōmaʻomaʻo, uliuli, melemele. Nā palena palaoa hexagonal a me cubic, he pā ke kristal, he kolamu hui. ʻO ka luster aniani, ka nui o 3.17 ~ 3.47G/CM3, ka paʻakikī Morse 9.2, ʻo ka microscope hoʻi ma 30380 ~ 33320MPa he kiko heheʻe: ua hoʻomaka ka 2050 e hoʻokaʻawale i ka lewa, ua hoʻomaka ka 2600 e hoʻokaʻawale i ka lewa hoʻōla. ʻO ke koina elastic he 466,480 MPa. ʻO ka ikaika tensile he 171.5MPa. ʻO ka ikaika compressive he 1029MPa. ʻO ke koina hoʻonui linear he (25 ~ 1000)5.010 ~ 6/. ʻO ka conductivity thermal (20) he 59w/(mk). ʻO ke kūpaʻa kemika, e paila ana i loko o HCl, H2SO4, HF ʻaʻole e mae.
Wahi a nā hoʻohana like ʻole, ua māhele ʻia ka silicon carbide sintered kaomi lewa i ka abrasive, refractory data, deoxidizer, electrical silicon carbide a pēlā aku. ʻAʻole e emi ka nui o ka SiC o ka abrasive silicon carbide ma mua o 98%. Ua māhele ʻia ka refractory silicon carbide i: (1) ʻikepili refractory holomua ʻeleʻele silicon carbide, ʻo kona nui SiC ua like like me ka wili ʻana i ka silicon carbide. (2) ʻIkepili refractory lua ʻeleʻele silicon carbide, ʻoi aku ka nui o ka SiC ma mua o 90%. (3) ʻAʻole emi ka nui o ka silicon carbide ʻeleʻele a me SiC i nā refractories haʻahaʻa ma mua o 83%. ʻO ka nui o ka silicon carbide a me SiC i hoʻohana ʻia i ka deoxidizer e pono ma mua o 90%. Eia nō naʻe, hiki ke hoʻohana ʻia ka nui o ka silicon carbide a me SiC i ka deoxidizer ma mua o 45% o ka mālama ʻana e like me ka deoxidizer hana kila. ʻElua ʻano o ke ʻano pauka a me ka poloka hoʻoheheʻe ʻana o ka Silicon carbide no ka mea deoxidizing. ʻO ka nui o ka ʻāpana o ka Powder deoxidizer ʻeleʻele silicon carbide he 4 ~ 0.5 mm a me 0.5 ~ 0.1 mm.
ʻElua mau māhele nui o ka silicon carbide pono uila
(1) ʻO ke silicon carbide ʻōmaʻomaʻo i hoʻohana ʻia no nā mea hoʻomehana uila ua like ia me ka silicon carbide ʻōmaʻomaʻo i hoʻohana ʻia no ka wili ʻana.
(2) Loaʻa i ka silicon carbide no ka arrester nā koi hana uila kūikawā, ʻokoʻa ia mai ka silicon carbide ʻeleʻele no ka wili ʻana i ka ʻikepili refractory.
Ka hoʻohana ʻana i ke kaomi lewa sintered silicon carbide
Loaʻa i nā huahana silicon carbide sintered kaomi lewa nā hana kūikawā e like me ke kūpaʻa wela kiʻekiʻe, ke kūpaʻa ʻana i ka ʻaʻahu, ke kūpaʻa wela, ke kūpaʻa ahi, ke kūpaʻa radiation, ka conductivity uila a me ka thermal maikaʻi loa, a pēlā aku, a ua hoʻohana nui ʻia ma nā ʻoihana like ʻole o ka hoʻokele waiwai aupuni. Ma Kina, hoʻohana nui ʻia ka silicon carbide ʻōmaʻomaʻo ma ke ʻano he abrasive. Hoʻohana ʻia ka silicon carbide ʻeleʻele e hana i nā pōhaku wili, kahi i hoʻohana pinepine ʻia e ʻoki a wili i nā mea me ka ikaika tensile haʻahaʻa, e like me ke aniani, nā keramika, nā pōhaku, nā refractories, a no ka wili ʻana i nā ʻāpana hao i hoʻolei ʻia a me nā mea metala non-ferrous. ʻO ka wili ʻana i hana ʻia me ka silicon carbide ʻōmaʻomaʻo e hoʻohana nui ʻia no ka wili ʻana i ka carbide cemented, titanium alloy, optical glass, a no ka wili ʻana i ka liner cylinder a me nā mea hana kila wikiwiki. Hoʻohana wale ʻia nā abrasives silicon carbide cubic no ka wili ultra-precision o nā bearings miniature. Hiki ke hoʻomaikaʻi nui ʻia ke kūpaʻa ʻana o nā impellers turbine ma ka hoʻopili ʻana i ka pauka SIC ma luna o lākou ma o ka electroplating. Ma ka hoʻohana ʻana i ke kaomi mechanical e hoʻokuke i ka wili cubic SiC200 a me ka pauka micro W28 i ka paia cylinder o ka mīkini puhi kūloko, hiki ke pālua ke ola o ka cylinder.
Ka manawa hoʻouna: Iune-16-2023