Cov tshuaj tiv thaiv-sintered silicon carbide yog ib qho tseem ceeb ntawm cov khoom kub kub, muaj zog, siab hardness, siab hnav tsis kam, siab corrosion kuj thiab siab oxidation tsis kam thiab lwm yam zoo heev, yog dav siv nyob rau hauv machinery, aerospace, tshuaj lom neeg kev lag luam, lub zog thiab lwm yam. teb.
1. Raw khoom npaj
Kev npaj ntawm reactive sintering silicon carbide raw cov ntaub ntawv yog cov pa roj carbon ntau thiab silicon hmoov, uas carbon yuav siv tau ntau yam ntawm carbon-muaj tshuaj, xws li thee coke, graphite, charcoal, thiab lwm yam., silicon hmoov feem ntau yog xaiv nrog ib tug particle. loj ntawm 1-5μm siab purity silicon hmoov. Ua ntej, carbon thiab silicon hmoov sib tov nyob rau hauv ib qho kev faib ua feem, ntxiv ib tug tsim nyog tus nqi ntawm binder thiab txaus tus neeg sawv cev, thiab stirring tusyees. Cov sib tov yog muab tso rau hauv lub pob zeb rau pob milling kom sib xyaw ntxiv thiab sib tsoo kom txog thaum qhov loj me me dua 1μm.
2. Moulding txheej txheem
Moulding txheej txheem yog ib qho ntawm cov kauj ruam tseem ceeb hauv kev tsim khoom silicon carbide. Cov txheej txheem molding feem ntau yog nias molding, grouting molding thiab zoo li qub molding. Xovxwm txoj kev txhais tau hais tias qhov sib tov yog muab tso rau hauv pwm thiab tsim los ntawm cov neeg kho tshuab siab. Grouting molding yog hais txog kev sib xyaw cov khoom sib xyaw nrog dej lossis cov kuab tshuaj organic, txhaj rau hauv cov pwm los ntawm cov koob txhaj tshuaj nyob rau hauv lub tshuab nqus tsev, thiab tsim cov khoom tiav tom qab sawv. Static siab molding yog hais txog kev sib tov rau hauv pwm, nyob rau hauv kev tiv thaiv ntawm lub tshuab nqus tsev los yog cua rau static siab molding, feem ntau yog nyob rau ntawm ib tug siab ntawm 20-30MPa.
3. Sintering txheej txheem
Sintering yog ib kauj ruam tseem ceeb hauv kev tsim cov tshuaj tiv thaiv-sintered silicon carbide. Sintering kub, sintering lub sij hawm, sintering cua thiab lwm yam yuav cuam tshuam qhov kev ua tau zoo ntawm cov tshuaj tiv thaiv-sintered silicon carbide. Feem ntau, sintering kub ntawm reactive sintering silicon carbide yog nyob nruab nrab ntawm 2000-2400 ℃, lub sij hawm sintering feem ntau yog 1-3 teev, thiab sintering cua feem ntau inert, xws li argon, nitrogen, thiab hais txog. Thaum lub sij hawm sintering, qhov sib tov yuav raug tshuaj lom neeg los tsim silicon carbide crystals. Nyob rau tib lub sijhawm, cov pa roj carbon kuj tseem yuav ua rau cov pa roj carbon monoxide hauv huab cua los tsim cov pa roj xws li CO thiab CO2, uas yuav cuam tshuam rau qhov ntom ntom thiab cov khoom ntawm silicon carbide. Yog li ntawd, kev tswj xyuas qhov tsim nyog sintering cua thiab lub sijhawm sintering yog qhov tseem ceeb heev rau kev tsim cov tshuaj tiv thaiv-sintered silicon carbide.
4. Cov txheej txheem tom qab kho
Cov tshuaj tiv thaiv-sintered silicon carbide yuav tsum muaj kev kho mob tom qab kev tsim khoom. Cov txheej txheem tom qab kev kho mob feem ntau yog machining, sib tsoo, polishing, oxidation thiab lwm yam. Cov txheej txheem no yog tsim los txhim kho qhov tseeb thiab qhov zoo ntawm cov tshuaj tiv thaiv-sintered silicon carbide. Ntawm lawv, cov txheej txheem sib tsoo thiab polishing yog ib txoj kev ua ntau yam, uas tuaj yeem txhim kho qhov tiav thiab flatness ntawm silicon carbide nto. Cov txheej txheem oxidation tuaj yeem tsim cov txheej txheem oxide txhawm rau txhim kho oxidation tsis kam thiab tshuaj lom neeg ruaj khov ntawm cov tshuaj tiv thaiv-sintered silicon carbide.
Nyob rau hauv luv luv, reactive sintering silicon carbide manufacturing yog ib tug complex txheej txheem, yuav tsum paub ntau yam technologies thiab cov txheej txheem, xws li raw cov ntaub ntawv npaj, molding txheej txheem, sintering txheej txheem thiab tom qab kev kho mob. Tsuas yog los ntawm kev paub txog cov thev naus laus zis thiab cov txheej txheem no tuaj yeem ua tau zoo cov tshuaj tiv thaiv-sintered silicon carbide cov ntaub ntawv tsim los ua kom tau raws li qhov xav tau ntawm ntau daim ntawv thov.
Post lub sij hawm: Jul-06-2023