Kev siv tshuaj sintering silicon carbide yog ib txoj hauv kev tseem ceeb los tsim cov khoom siv ceramic ua tau zoo. Txoj kev no siv kev kho cua sov ntawm cov pa roj carbon thiab silicon ntawm qhov kub siab kom lawv ua rau cov khoom siv silicon carbide ceramics.
1. Kev npaj cov khoom siv raw. Cov khoom siv raw ntawm cov tshuaj silicon carbide uas tau ua los ntawm cov tshuaj reaction-sintered muaj xws li cov pa roj carbon thiab cov pa roj silicon. Cov pa roj carbon feem ntau yog cov pa roj carbon dub lossis cov polymer uas muaj cov pa roj carbon, thaum cov pa roj silicon yog cov hmoov silica. Cov khoom siv raw no yuav tsum tau muab tsoo, tshuaj xyuas thiab sib xyaw kom ntseeg tau tias cov khoom me me sib npaug, thaum tswj lawv cov tshuaj lom neeg kom tau txais cov khoom siv silicon carbide zoo thaum lub sijhawm kho cua sov.
2. Ua kom zoo li cas. Muab cov khoom siv raw sib xyaw rau hauv pwm pwm rau kev ua pwm. Muaj ntau hom kev ua pwm, feem ntau yog nias pwm thiab txhaj tshuaj pwm. Nias pwm yog kev nias cov hmoov raw khoom hauv qab kev nias kom ua pwm, thaum txhaj tshuaj pwm yog cov khoom siv raw sib xyaw nrog cov nplaum, nws raug txau rau hauv pwm los ntawm lub koob txhaj tshuaj kom ua pwm. Tom qab ua pwm, nws yog qhov tsim nyog los ua kev kho kom tshem tawm cov khoom siv ceramic billet ntawm pwm.
3. Kev kho cua sov. Lub cev ceramic uas tsim tau muab tso rau hauv lub cub tawg kho cua sov rau sintering. Cov txheej txheem sintering muab faib ua ob theem: theem carbonization thiab theem sintering. Hauv theem carbonization, lub cev ceramic raug cua sov rau qhov kub siab (feem ntau siab dua 1600 ° C) nyob rau hauv ib qho chaw inert, thiab cov pa roj carbon reacts nrog cov khoom silicon los tsim silicon carbide. Hauv theem sintering, qhov kub tau tsa mus rau qhov kub siab dua (feem ntau siab dua 1900 ° C), uas ua rau recrystallization thiab densification ntawm cov khoom silicon carbide. Ua li no, qhov ceev ntawm lub cev silicon carbide tau txhim kho ntxiv, thaum lub zog thiab hnav tsis kam kuj tau txhim kho ntau heev.
4. Kev Ua Tiav. Lub cev ceramic sintered yuav tsum tau ua tiav kom tau txais cov duab thiab qhov loj me uas xav tau. Cov txheej txheem ua tiav suav nrog kev sib tsoo, txiav, drilling, thiab lwm yam. Vim yog qhov nyuaj heev ntawm cov khoom siv silicon carbide, nws nyuaj rau ua tiav, xav tau kev siv cov cuab yeej sib tsoo thiab cov khoom siv ua tiav siab.
Hauv kev xaus lus, cov txheej txheem tsim cov tshuaj silicon carbide reaction-sintered suav nrog kev npaj cov khoom siv raw, molding, kev kho cua sov thiab kev ua tiav. Ntawm lawv, cov kauj ruam tseem ceeb yog cov txheej txheem kho cua sov, kev tswj hwm uas yog qhov tseem ceeb kom tau txais cov khoom siv silicon carbide zoo. Nws yog qhov tsim nyog los tswj qhov kub, huab cua, tuav lub sijhawm thiab lwm yam ntawm kev kho cua sov kom ntseeg tau tias cov tshuaj tiv thaiv txaus, crystallization tiav thiab qhov ceev yog siab.
Qhov zoo ntawm cov txheej txheem tsim cov tshuaj silicon carbide reaction-sintered yog tias cov khoom siv ceramic uas muaj qhov nyuaj siab, lub zog siab, kev tiv taus hnav siab thiab kev ruaj khov kub siab tuaj yeem npaj tau. Cov khoom siv no tsis yog tsuas yog muaj cov khoom siv zoo heev, tab sis kuj muaj kev tiv taus corrosion zoo heev thiab cov khoom kub siab. Cov ntaub ntawv silicon carbide tuaj yeem siv los tsim ntau yam khoom siv engineering, cov khoom siv kho tshuab, cov khoom siv kho cua sov, cov khoom siv ceramic rauv taws thiab lwm yam. Tib lub sijhawm, cov ntaub ntawv silicon carbide kuj tseem siv tau rau hauv semiconductor, lub zog hnub ci, cov ntaub ntawv sib nqus thiab lwm yam teb.
Hauv ntej, kev siv tshuaj sintering silicon carbide yog ib txoj hauv kev tseem ceeb los npaj cov khoom siv ceramic ua tau zoo. Cov txheej txheem tsim khoom yuav tsum tau tswj hwm txhua qhov txuas kom tau txais cov khoom siv silicon carbide zoo. Cov khoom siv silicon carbide uas siv tshuaj sintered muaj cov khoom siv kho tshuab zoo heev, tiv taus corrosion thiab kub, thiab muaj kev cia siab dav hauv ntau yam kev lag luam thiab kev tshawb fawb.
Lub sijhawm tshaj tawm: Lub Xya Hli-21-2023