Silicon Carbide, tseem hu ua carborundum, yog silicon-carbon compound. Cov tshuaj lom neeg no yog ib qho ntawm cov ntxhia moissanite. Daim ntawv tshwm sim ntawm Silicon Carbide muaj npe tom qab Dr Ferdinand Henri Moissan, tus kws muag tshuaj Fab Kis. Moissanite feem ntau pom nyob rau hauv feeb npaum li cas hauv meteorites, kimberlite, thiab corundum. Qhov no yog li cas feem ntau kev lag luam Silicon Carbide tau ua. Txawm hais tias ib txwm tshwm sim Silicon Carbide nyuaj nrhiav hauv ntiaj teb, nws muaj ntau nyob hauv qhov chaw.
Variations ntawm Silicon Carbide
Silicon Carbide khoom yog tsim nyob rau hauv plaub daim ntawv rau siv nyob rau hauv kev lag luam engineering daim ntaub ntawv. Cov no suav nrog
Sintered Silicon Carbide (SSiC)
Reaction Bonded Silicon Carbide (RBSiC lossis SiSiC)
Nitride Bonded Silicon Carbide (NSiC)
Recrystallized Silicon Carbide (RSiC)
Lwm qhov kev hloov pauv ntawm daim ntawv cog lus suav nrog SIALON bonded Silicon Carbide. Kuj tseem muaj CVD Silicon Carbide (CVD-SiC), uas yog ib daim ntawv ntshiab heev ntawm cov compound uas ua los ntawm cov tshuaj vapor deposition.
Txhawm rau sinter Silicon Carbide, nws yog ib qho tsim nyog yuav tsum tau ntxiv cov khoom siv sintering uas pab tsim cov kua theem ntawm qhov kub thiab txias, tso cai rau Silicon Carbide nplej los ua ke.
Cov khoom tseem ceeb ntawm Silicon Carbide
High thermal conductivity thiab qis coefficient ntawm thermal expansion. Qhov kev sib xyaw ua ke ntawm cov khoom no muab qhov tshwj xeeb thermal shock tsis kam, ua rau Silicon Carbide ceramics pab tau ntau yam kev lag luam. Nws tseem yog ib qho semiconductor thiab nws cov khoom hluav taws xob ua rau nws haum rau ntau yam kev siv. Nws kuj tseem paub txog nws qhov hnyav hardness thiab corrosion kuj.
Kev siv ntawm Silicon Carbide
Silicon Carbide tuaj yeem siv rau hauv ntau qhov kev lag luam.
Nws lub cev hardness ua rau nws haum rau abrasive machining txheej txheem xws li sib tsoo, honing, sandblasting, thiab waterjet txiav.
Silicon Carbide muaj peev xwm tiv taus qhov kub siab heev yam tsis muaj kev tawg lossis deforming yog siv los tsim cov khoom siv hluav taws xob ceramic rau cov tsheb ua si. Nws kuj yog siv los ua cov khoom siv armor nyob rau hauv cov mos txwv vests thiab raws li ib tug sealing nplhaib khoom rau lub twj tso kua mis ncej ntsaws ruaj ruaj, qhov uas nws feem ntau khiav ntawm high speeds nyob rau hauv kev sib cuag nrog ib tug Silicon Carbide foob. Silicon Carbide lub siab thermal conductivity, uas muaj peev xwm dissipate lub tshav kub kev sib txhuam generated los ntawm ib tug rubbing interface, yog ib tug tseem ceeb kom zoo dua nyob rau hauv cov ntaub ntawv no.
Vim lub siab tawv hardness ntawm cov khoom, nws yog siv nyob rau hauv ntau yam engineering daim ntaub ntawv uas muaj ntau theem ntawm tsis kam mus zawv zawg, erosive thiab corrosive hnav yuav tsum tau. Feem ntau, qhov no siv rau cov khoom siv hauv cov twj siv los yog cov li qub hauv cov ntawv siv roj av, qhov twg cov khoom siv hlau zoo ib yam yuav pom cov khoom hnav ntau dhau ua rau tsis ua haujlwm sai.
Cov khoom siv hluav taws xob tshwj xeeb ua cov khoom siv hluav taws xob ua rau nws zoo tagnrho rau kev tsim cov khoom siv hluav taws xob ultrafast thiab high-voltage light-emitting diodes, MOSFETs, thiab thyristors rau high-power switching.
Nws tsis tshua muaj coefficient ntawm thermal expansion, hardness, nruj, thiab thermal conductivity ua rau nws zoo tagnrho rau astronomical telescope tsom iav. Nyias filament pyrometry yog cov txheej txheem kho qhov muag uas siv Silicon Carbide filaments los ntsuas qhov kub ntawm cov pa roj.
Nws kuj yog siv rau hauv cov khoom cua sov uas yuav tsum tau tiv taus kub heev. Nws kuj tseem siv los muab kev txhawb nqa kev tsim kho hauv high-temperature gas-cooled nuclear reactors.
