Recrystallized Silicon Carbide (RXSIC, ReSIC, RSIC, R-SIC). Qhov pib raw khoom yog silicon carbide. Tsis siv cov densification pab. Green compacts yog rhuab mus tshaj 2200ºC rau zaum kawg consolidation. Cov khoom siv tau muaj li ntawm 25% porosity, uas txwv nws cov khoom siv kho tshuab; Txawm li cas los xij, cov khoom siv tuaj yeem ua kom huv heev. Cov txheej txheem yog kev lag luam heev.
Cov tshuaj tiv thaiv Bonded Silicon Carbide (RBSIC). Cov khoom siv pib yog silicon carbide ntxiv rau carbon. Cov tshuaj ntsuab yog ces infiltrated nrog molten silicon saum 1450ºC nrog cov tshuaj tiv thaiv: SiC + C + Si -> SiC. Lub microstructure feem ntau muaj qee qhov ntau dhau ntawm silicon, uas txwv nws cov khoom kub-kub thiab corrosion kuj. Kev hloov pauv me me tshwm sim thaum lub sijhawm ua haujlwm; Txawm li cas los xij, ib txheej ntawm silicon feem ntau muaj nyob rau saum npoo ntawm qhov kawg. ZPC RBSiC tau txais kev siv thev naus laus zis, ua rau hnav tsis kam hauv ob sab phlu, daim hlau, vuas, cyclone hauv ob sab phlu, blocks, tsis xwm yeem, thiab hnav & corrosion kuj FGD nozzles, tshav kub exchanger, kav, raj, thiab lwm yam.
Nitride Bonded Silicon Carbide (NBSIC, NSIC). Cov khoom siv pib yog silicon carbide ntxiv rau silicon hmoov. Cov ntsuab compact raug rho tawm haujlwm nyob rau hauv ib qho chaw nitrogen uas cov tshuaj tiv thaiv SiC + 3Si + 2N2 -> SiC + Si3N4 tshwm sim. Cov khoom siv zaum kawg nthuav tawm qhov hloov me me thaum lub sijhawm ua haujlwm. Cov ntaub ntawv nthuav tawm qee theem ntawm porosity (feem ntau txog 20%).
Direct Sintered Silicon Carbide (SSIC). Silicon carbide yog cov khoom lag luam pib. Kev pab cuam pab AIDSIC yog Boron ntxiv Carbon, thiab qhov sib txawv tshwm sim los ntawm cov txheej txheem-lub xeev cov tshuaj tiv thaiv cov txheej txheem saum 2200ºC. Nws cov khoom kub kub thiab kev tiv thaiv corrosion yog qhov zoo tshaj vim tias tsis muaj lub khob iav thib ob ntawm cov kab lis kev cai.
Liquid Phase Sintered Silicon Carbide (LSSIC). Silicon carbide yog thawj cov khoom siv raw. Cov khoom siv ceev ceev yog yttrium oxide ntxiv rau txhuas oxide. Densification tshwm sim saum 2100ºC los ntawm cov kua-theem cov tshuaj tiv thaiv thiab ua rau lub khob iav thib ob. Cov khoom siv kho tshuab feem ntau zoo dua rau SSIC, tab sis cov khoom kub thiab cov corrosion kuj tsis zoo li.
Kub Pressed Silicon Carbide (HPSIC). Silicon carbide hmoov yog siv los ua raw khoom. Cov kev pabcuam densification feem ntau yog boron ntxiv rau carbon lossis yttrium oxide ntxiv rau txhuas oxide. Qhov ntom ntom tshwm sim los ntawm kev siv tib lub sijhawm ntawm kev siv tshuab siab thiab kub hauv graphite tuag kab noj hniav. Cov duab yog daim hlau yooj yim. Cov khoom siv sintering tsawg tuaj yeem siv tau. Mechanical zog ntawm cov ntaub ntawv kub pressed yog siv los ua lub hauv paus tiv thaiv lwm yam txheej txheem sib piv. Cov khoom hluav taws xob tuaj yeem hloov pauv los ntawm kev hloov pauv ntawm cov khoom siv densification.
CVD Silicon Carbide (CVDSIC). Cov khoom no yog tsim los ntawm cov txheej txheem tshuaj vapor deposition (CVD) uas muaj cov tshuaj tiv thaiv: CH3SiCl3 -> SiC + 3HCl. Cov tshuaj tiv thaiv yog ua raws li H2 huab cua nrog SiC tso rau hauv graphite substrate. Cov txheej txheem ua rau cov khoom siv purity heev; txawm li cas los xij, tsuas yog daim hlau yooj yim tuaj yeem ua tau. Cov txheej txheem yog kim heev vim lub sij hawm qeeb cov tshuaj tiv thaiv.
Chemical Vapor Composite Silicon Carbide (CVCSiC). Cov txheej txheem no pib nrog tus tswv ntawm graphite precursor uas yog machined rau hauv ze-net duab nyob rau hauv lub xeev graphite. Cov txheej txheem hloov dua siab tshiab yuav raug cov graphite ib feem rau hauv qhov chaw vapor solid-state cov tshuaj tiv thaiv los tsim cov polycrystalline, stoichiometrically raug SiC. Cov txheej txheem tswj nruj nruj no tso cai rau cov qauv tsim kom yooj yim ua rau hauv qhov hloov pauv SiC tag nrho uas muaj cov yam ntxwv ua siab ntev thiab siab purity. Cov txheej txheem hloov dua siab tshiab ua rau lub sijhawm tsim khoom luv luv thiab txo cov nqi ntau dua lwm txoj hauv kev.* Qhov chaw (tshwj tsis yog qhov tau sau tseg): Ceradyne Inc., Costa Mesa, Calif.
Post lub sij hawm: Jun-16-2018