Silicon carbide ceramicKev sib piv txheej txheem molding: txheej txheem sintering thiab nws qhov zoo thiab qhov tsis zoo
Hauv kev tsim cov silicon carbide ceramics, kev tsim tsuas yog ib qho txuas hauv tag nrho cov txheej txheem. Sintering yog cov txheej txheem tseem ceeb uas cuam tshuam ncaj qha rau qhov kawg kev ua haujlwm thiab kev ua haujlwm ntawm ceramics. Muaj ntau ntau txoj kev sib txawv ntawm sintering silicon carbide ceramics, txhua tus muaj nws tus kheej zoo thiab qhov tsis zoo. Hauv tsab ntawv blog no, peb yuav tshawb xyuas cov txheej txheem sintering ntawm silicon carbide ceramics thiab sib piv ntau txoj hauv kev.
1. Cov tshuaj tiv thaiv sintering:
Cov tshuaj tiv thaiv sintering yog cov txheej txheem nrov tsim rau silicon carbide ceramics. Qhov no yog ib qho yooj yim thiab siv tau zoo nyob ze cov txheej txheem net-rau-loj. Sintering yog ua tiav los ntawm silicidation cov tshuaj tiv thaiv ntawm qhov kub qis ntawm 1450 ~ 1600 ° C thiab lub sijhawm luv dua. Txoj kev no tuaj yeem tsim cov khoom loj thiab cov duab zoo. Txawm li cas los xij, nws kuj muaj nws qhov tsis zoo. Cov tshuaj tiv thaiv siliconizing inevitably ua rau 8% ~ 12% silicon dawb hauv silicon carbide, uas txo nws cov khoom kub kub, tiv thaiv corrosion, thiab oxidation kuj. Thiab kev siv kub yog txwv qis dua 1350 ° C.
2. Kub nias sintering:
Kub nias sintering yog lwm txoj hauv kev rau sintering silicon carbide ceramics. Nyob rau hauv txoj kev no, qhuav silicon carbide hmoov yog sau rau hauv pwm thiab rhuab thaum siv lub siab los ntawm ib tug uniaxial kev taw qhia. Cov cua kub ib txhij thiab siab txhawb nqa particle diffusion, ntws, thiab loj hloov mus, ua rau silicon carbide ceramics nrog nplua nplej, siab txheeb ze, thiab zoo heev txhua yam khoom. Txawm li cas los xij, kub nias sintering kuj muaj nws qhov tsis zoo. Cov txheej txheem yog qhov nyuaj dua thiab xav tau cov khoom siv pwm zoo thiab cov khoom siv. Kev ua haujlwm ntau lawm yog tsawg thiab tus nqi siab. Tsis tas li ntawd, txoj kev no tsuas yog tsim nyog rau cov khoom siv nrog cov duab yooj yim.
3. Kub isostatic nias sintering:
Kub isostatic pressing (HIP) sintering yog cov txheej txheem uas muaj kev sib xyaw ua ke ntawm qhov kub thiab txias thiab isotropically balanced high-pressure gas. Nws yog siv rau sintering thiab densification ntawm silicon carbide ceramic hmoov, ntsuab lub cev los yog pre-sintered lub cev. Txawm hais tias HIP sintering tuaj yeem txhim kho kev ua haujlwm ntawm silicon carbide ceramics, nws tsis yog siv dav hauv kev tsim khoom loj vim cov txheej txheem nyuaj thiab tus nqi siab.
4. Pressureless sintering:
Pressureless sintering yog ib txoj hauv kev nrog kev ua haujlwm kub zoo, cov txheej txheem sintering yooj yim thiab tus nqi qis ntawm silicon carbide ceramics. Nws kuj tso cai rau ntau txoj kev tsim, ua rau nws haum rau cov duab nyuaj thiab tuab qhov chaw. Txoj kev no yog qhov tsim nyog rau kev lag luam loj loj ntawm silicon ceramics.
Hauv cov ntsiab lus, cov txheej txheem sintering yog ib kauj ruam tseem ceeb hauv kev tsim cov SiC ceramics. Qhov kev xaiv ntawm sintering txoj kev nyob ntawm tej yam xws li cov khoom uas xav tau ntawm cov ceramic, complexity ntawm cov duab, ntau lawm nqi thiab efficiency. Txhua txoj kev muaj nws qhov zoo thiab qhov tsis zoo, thiab nws yog ib qho tseem ceeb uas yuav tsum tau ua tib zoo xav txog cov xwm txheej no los txiav txim siab cov txheej txheem sintering uas tsim nyog tshaj plaws rau ib daim ntawv thov.
Post lub sij hawm: Aug-24-2023