Cov tshuaj tiv thaiv-sintered silicon carbide porcelain muaj lub zog zoo compressive ntawm ambient kub, tshav kub tsis kam rau huab cua oxidation, zoo hnav tsis kam, zoo kub tsis kam, me me coefficient ntawm linear expansion, siab kub hloov coefficient, siab hardness, kub tsis kam thiab puas, hluav taws kub tiv thaiv thiab lwm cov yam ntxwv zoo. Dav siv nyob rau hauv tsheb, mechanical automation, ecological environmental protection, aerospace engineering, information electronic devices, power energy and other fields, tau ua tus nqi-zoo thiab irreplaceable structural ceramics nyob rau hauv ntau yam kev lag luam.
Pressureless sintering yog lub npe hu ua kev cog lus SiC calcination. Rau qhov sib txawv nruam casting tshuab, xovxwm-dawb sintering tuaj yeem muab faib ua cov txheej txheem calcination thiab kev ua haujlwm siab ua kua theem calcination. Los ntawm kev ntxiv qhov tsim nyog B thiab C (cov ntsiab lus oxygen tsawg dua 2%) ua ke hauv cov hmoov zoo Beta SiC, S. Proehazka yog sintered rau hauv SIC calcined lub cev nrog ib tug txheeb ze ntom ntawm ntau tshaj 98% ntawm 2020, nrog Al2O3 thiab Y2O3 raws li tshuaj ntxiv. Calcined 0.5m-SiC nyob rau hauv 1850-1950 (particle nto nrog me ntsis SiO2), qhov xaus yog tias qhov ntom ntawm SiC porcelain tshaj 95% ntawm qhov yooj yim theoretical ntom, cov nplej loj me me, thiab qhov nruab nrab loj yog loj, uas. yog 1,5m.
Reactive sintering silicon carbide yog hais txog tag nrho cov txheej txheem ntawm kev xav txog cov qauv ntxeem tau nrog cov kua theem lossis qib ua kua ua haujlwm siab, txhim kho qhov zoo ntawm cov pob zeb, txo cov qhov cua, thiab calcining cov khoom tiav nrog qee lub zog thiab qhov tseeb. Plutonium-sic hmoov thiab siab purity graphite yog tov nyob rau hauv ib qho kev faib ua feem thiab rhuab mus txog 1650 los tsim cov plaub hau embryo. Nyob rau tib lub sijhawm, nws nkag mus lossis nkag mus rau hauv cov hlau los ntawm cov kua theem Si, muaj kev cuam tshuam nrog silicon carbide los tsim plutonium-sic, thiab fuses nrog cov plutonium-sic uas twb muaj lawm. Tom qab Si infiltration, cov tshuaj tiv thaiv sintered lub cev nrog cov ncauj lus kom ntxaws txheeb ze thiab qhov loj me tuaj yeem tau txais. Piv nrog rau lwm yam sintering txoj kev, nyob rau hauv tus txheej txheem ntawm high density tshuaj tiv thaiv sintering loj transformation yog kuj me me, muaj peev xwm tsim qhov loj ntawm cov khoom, tab sis muaj ntau ntawm SiC ntawm lub cev calcined, qhov kub thiab txias yam ntxwv ntawm cov tshuaj tiv thaiv sintered SiC porcelain. yuav phem dua. Non-pressure calcined SiC ceramics, kub isostatic calcined SiC ceramics thiab cov tshuaj tiv thaiv sintered SiC ceramics muaj cov yam ntxwv sib txawv.
Reactive sintering silicon carbide manufacturers: Piv txwv li, SiC porcelain nyob rau theem ntawm calcined txheeb ze ntom ntom thiab dabtsi yog khoov lub zog, kub nias sintering thiab kub isostatic nias calcination muaj ntau, thiab reactive sintering SiC yog kuj tsawg. Nyob rau tib lub sijhawm, cov khoom ntawm lub cev ntawm SiC porcelain hloov nrog kev hloov ntawm calcination modifier. Cov tsis-siab sintering, kub xovxwm sintering thiab cov tshuaj tiv thaiv sintering ntawm SiC porcelain muaj alkaline tsis kam thiab acid tsis kam, tab sis cov tshuaj tiv thaiv sintered SiC porcelain muaj zog tiv thaiv HF thiab lwm yam muaj zog acid corrosion. Thaum lub ambient kub yog tsawg dua 900, lub zog dabtsi yog khoov ntawm feem ntau SiC plooj (porcelain) yog ho siab tshaj qhov kub siab sintered porcelain, thiab lub zog dabtsi yog khoov ntawm reactive sintered SiC porcelain poob siab heev thaum nws tshaj 1400. (Qhov no yog tshwm sim los ntawm tam sim no. poob nyob rau hauv dabtsi yog khoov lub zog ntawm ib tug npaum li cas ntawm laminated iav Si tshaj ib tug tej yam kub nyob rau hauv lub calcined lub siab Kev ua haujlwm kub ntawm SiC ceramics sintered yam tsis muaj siab calcination thiab nyob rau hauv qhov kub tsis tu ncua siab zoo li qub feem ntau cuam tshuam los ntawm hom additives.
Post lub sij hawm: Nov-07-2023