Cov tshuaj tiv thaiv sintering silicon carbide yog ib txoj hauv kev tseem ceeb los tsim cov khoom siv ceramic zoo. Txoj kev no siv cov kev kho cua sov ntawm cov pa roj carbon thiab silicon ntawm qhov kub thiab txias ua rau lawv hnov mob rau daim ntawv silicon carbide ceramics.
1. Kev npaj cov khoom siv raw. Cov khoom siv raw ntawm cov tshuaj tiv thaiv-sintered silicon carbide muaj xws li carbon qhov chaw thiab silicon qhov chaw. Cov pa roj carbon monoxide feem ntau yog cov pa roj carbon dub lossis cov roj carbon uas muaj cov polymer, thaum cov khoom siv silicon yog hmoov silica. Cov ntaub ntawv nyoos no yuav tsum tau crushed, tshuaj xyuas thiab sib xyaw kom ntseeg tau tias qhov loj me me, thaum tseem tswj lawv cov tshuaj muaj pes tsawg leeg thiaj li yuav tau txais cov khoom zoo silicon carbide ceramics thaum kho cua sov.
2. Cov duab. Muab cov khoom sib xyaw ua ke rau hauv cov pwm pwm rau molding. Muaj ntau ntau hom kev txhaj tshuaj molding, feem ntau siv yog nias molding thiab txhaj tshuaj molding. Xovxwm molding yog compression ntawm raw cov ntaub ntawv hmoov nyob rau hauv siab rau daim ntawv, thaum txhaj molding yog raw khoom tov nrog ib tug nplaum, nws yog sprayed rau hauv pwm los ntawm ib tug syringe rau daim ntawv. Tom qab tsim, nws yog ib qho tsim nyog yuav tau ua kev kho demoulding kom tshem tawm cov pob zeb ceramic los ntawm pwm.
3. Kev kho cua sov. Cov tsim ceramic lub cev yog muab tso rau hauv lub qhov cub kho cua sov rau sintering. Cov txheej txheem sintering tau muab faib ua ob theem: carbonization theem thiab sintering theem. Nyob rau theem carbonization, lub cev ceramic yog rhuab mus rau qhov kub siab (feem ntau tshaj 1600 ° C) nyob rau hauv ib qho chaw inert, thiab cov pa roj carbon reacts nrog silicon qhov chaw los tsim silicon carbide. Nyob rau hauv lub sintering theem, qhov kub yog nce mus rau ib tug ntau dua kub (feem ntau tshaj 1900 ° C), uas ua rau recrystallization thiab densification ntawm silicon carbide hais. Nyob rau hauv txoj kev no, qhov ceev ntawm silicon carbide lub cev yog ntxiv txhim kho, thaum lub hardness thiab hnav kuj tseem ho txhim kho.
4. Ua tiav. Lub cev sintered ceramic yuav tsum tau ua kom tiav kom tau txais cov duab thiab qhov loj me. Txoj kev ua tiav suav nrog kev sib tsoo, txiav, drilling, thiab lwm yam. Vim tias qhov nyuaj ntawm cov khoom siv silicon carbide, nws nyuaj rau kev ua tiav, yuav tsum tau siv cov cuab yeej sib tsoo thiab cov cuab yeej ua haujlwm siab.
Hauv cov ntsiab lus, cov txheej txheem tsim tawm ntawm cov tshuaj tiv thaiv-sintered silicon carbide suav nrog kev npaj cov khoom siv raw, molding, kho cua sov thiab ua tiav. Ntawm lawv, cov kauj ruam tseem ceeb yog cov txheej txheem kev kho cua sov, kev tswj xyuas qhov tseem ceeb heev kom tau txais cov khoom zoo silicon carbide. Nws yog ib qho tsim nyog los tswj qhov kub thiab txias, huab cua, tuav lub sijhawm thiab lwm yam ntawm kev kho cua sov kom ntseeg tau tias cov tshuaj tiv thaiv txaus, cov crystallization tiav thiab qhov ceev yog siab.
Qhov kom zoo dua ntawm cov tshuaj tiv thaiv-sintered silicon carbide txheej txheem ntau lawm yog cov ntaub ntawv ceramic nrog siab hardness, siab zog, siab hnav tsis kam thiab kub stability tuaj yeem npaj tau. Cov khoom siv no tsis tsuas yog muaj cov khoom siv zoo heev, tab sis kuj muaj kev tiv thaiv corrosion zoo heev thiab kub kub. Silicon carbide cov ntaub ntawv tuaj yeem siv los tsim ntau yam khoom siv hluav taws xob, cov khoom siv foob, cov khoom siv kho cua sov, cov khoom siv hluav taws xob ceramics thiab lwm yam. Tib lub sijhawm, cov ntaub ntawv silicon carbide kuj tuaj yeem siv rau hauv semiconductor, hnub ci zog, cov khoom sib nqus thiab lwm yam.
Hauv luv luv, cov tshuaj tiv thaiv sintering silicon carbide yog ib txoj hauv kev tseem ceeb los npaj cov khoom siv ceramic ua haujlwm siab. Cov txheej txheem tsim khoom yuav tsum muaj kev tswj xyuas zoo ntawm txhua qhov txuas kom tau txais cov khoom zoo silicon carbide. Cov tshuaj tiv thaiv-sintered silicon carbide cov ntaub ntawv muaj cov khoom siv zoo heev, kev tiv thaiv corrosion thiab kub kub, thiab muaj cov ntawv thov dav dav hauv ntau yam kev lag luam thiab kev tshawb fawb.
Post lub sij hawm: Lub Xya hli ntuj-21-2023