Recrystallized Silicon Carbide (RXSIC, resic, RSIC, R-Sic). Cov khoom pib raw yog silicon carbide. Tsis muaj kev pab cuam cuam tshuam rau Densification. Cov khoom cog ntsuab ntsuab yog rhaub kom muaj dua 2200ºC rau kev sib sau ua kawg. Cov khoom siv tau muaj kwv yees li 25% porosity, uas txwv nws cov khoom siv mechanical; Txawm li cas los xij, cov khoom siv tuaj yeem ua tau dawb huv. Cov txheej txheem yog kev lag luam heev.
Cov yeeb ncuab sib tsoo Silicon carbide (rBSIC). Cov ntaub ntawv pib raw yog Silicon Carbide Ntxiv Carbon. Cov nplooj ntsuab tivthaiv yog tom qab ntawd infiltrated nrog Molten Silicon saum toj no 1450ºC nrog cov tshuaj tiv thaiv: Sic + si -> Sic. Lub microstructure feem ntau muaj qee qhov nyiaj ntau dhau silicon, uas txwv nws cov khoom kub thiab corrosion tsis kam. Cov kev hloov pauv me me uas muaj tshwm sim thaum lub sijhawm; Txawm li cas los xij, ib txheej ntawm silicon feem ntau tam sim no nyob rau saum npoo ntawm ntu kawg. ZPC RBSIC tau txais yuav cov kev siv thev naus laus zis, cov rooj zaum, cov vuas tsis txaus, thiab hnav cua sov, cov cua sov, cov raj, hlab, thiab lwm yam.
Nitride Bonded silicon carbide (nbsic, nsic). Cov ntaub ntawv pib raw yog silicon carbide ntxiv silicon hmoov. Cov nroj tsuag ntsuab tau raug rho tawm hauv cov nitrogen huab cua uas cov tshuaj tiv thaiv sic + 3si + 2N2 -> Sic + Si3N4 tshwm sim. Cov khoom siv kawg cov khoom siv hluav taws xob me me hloov thaum lub sijhawm ua. Cov khoom ua pov thawj qee qib ntawm porosity (feem ntau li 20%).
Ncaj qha sumined silicon carbide (ssic). Silicon carbide yog pib cov khoom siv raw. 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 nyom Highty thiab corrosion tsis kam yog zoo dua vim yog tsis muaj lub theem thib ob ntawm cov ciaj ciam.
Ua kua theem sintered silicon carbide (lssic). Silicon carbide yog pib cov khoom siv raw. Densification AIDS yog yttrium oxide ntxiv aluminium oxide. Densification tshwm sim saum 2100ºC los ntawm cov kua-theem cov tshuaj tiv thaiv thiab cov txiaj ntsig hauv cov theem pooly. Cov cuab yeej ua haujlwm feem ntau yog feem ntau zoo dua rau SSIC, tab sis cov hluav taws kub siab thiab cov xeb tawm tsam tsis zoo.
Cov xovxwm kub silicon carbide (hpsic). Silicon carbide hmoov yog siv raws li pib cov khoom siv raw. Densification AIDS feem ntau Boron ntxiv Carbon lossis yttrium oxide ntxiv aluminium. Txoj kev siv dag tshwm sim los ntawm kev thov sib txawv ntawm kev siv tshuab siab thiab ntsuas kub sab hauv graphite tuag kab noj hniav. Cov duab yog cov phiaj yooj yim. Tsawg tus nqi ntawm cov sintering AIDS yuav siv tau. Cov khoom siv neeg kho tshuab ntawm cov khoom siv tshiab tau siv los ua cov hauv paus rau lwm cov txheej txheem piv. Cov khoom hluav taws xob tuaj yeem hloov kho los ntawm kev hloov pauv hauv Densification AIDSICS.
CVD silicon carbide (cvdsic). Cov ntaub ntawv no yog tsim los ntawm cov tshuaj vapor deposition (CVD) cov txheej txheem cuam tshuam nrog cov tshuaj tiv thaiv: Ch3sicl3 -> Sic + 3hll. Cov tshuaj tiv thaiv yog nqa tawm hauv qab H2 cua nrog sic tau muab tso rau hauv graphite substrate. Cov txheej txheem ua rau muaj cov khoom siv ntau heev; Txawm li cas los xij, tsuas yog daim hlau yooj yim tuaj yeem tsim. Cov txheej txheem yog kim heev vim tias cov tshuaj tiv thaiv qeeb.
Tshuaj Vauv Vapor Ntaus Silicife Silicon Carbide (Cvcsic). Cov txheej txheem no pib nrog tus qauv tsim qauv txheej txheem ua ntej tsim nyog tau machined rau hauv ze-Net cov duab hauv lub xeev graphite. Cov txheej txheem hloov dua siab tshiab yog ib feem rau hauv situ vapor ruaj khov-lub xeev cov tshuaj tiv thaiv los tsim polycystalline, stoichiometrically raug sic. Cov txheej txheem tswj tau nruj no tso cai rau cov tsim qauv uas tau hloov pauv ntawm cov khoom siv hloov pauv tag nrho uas tau ua kom muaj kev pheej siab rau cov yam ntxwv thiab muaj kev coj dawb huv. Txheej txheem hloov dua siab lub sijhawm ib txwm muaj thiab txo cov nqi ntau dua lwm txoj kev. * Sournite)
Lub Sijhawm Post: Jun-16-2018