Nyob ib sab ntawm lub qhov cub 1000 ℃, hauv lub kaw lus tiv thaiv ib puag ncig kev lag luam, thiab sab hauv cov cuab yeej siv kho qhov muag meej, yeej ib txwm muaj cov khoom siv uas ntsiag to tiv taus qhov kev sim ntawm qhov kub thiab txias heev - nws yogsilicon carbide ceramicshu ua "kub dub hauv kev lag luam". Raws li cov khoom siv tseem ceeb hauv kev lag luam niaj hnub no, cov khoom siv thermal uas pom los ntawm silicon carbide ceramics yog rov txhais dua tib neeg txoj kev nkag siab txog cov ntaub ntawv kub siab.
1. Txoj kev 'ceev ceev' ntawm kev coj cua sov
Cov khoom siv ua los ntawm silicon carbide muaj cov thermal conductivity zoo ib yam li cov hlau, nrog rau cov thermal conductivity ntau zaus ntau dua li cov khoom siv ceramic ib txwm muaj. Cov thermal conductivity tshwj xeeb no yog vim muaj cov silicon carbon atoms uas tau teeb tsa nruj nreem hauv nws cov qauv siv lead ua, uas tsim cov channel conduction cua sov zoo. Thaum cua sov raug xa mus rau hauv cov khoom, nws zoo li lub tsheb tsav tsheb ntawm txoj kev loj uas tsis muaj kev thaiv, uas tuaj yeem faib cov cua sov sai thiab sib npaug, zam kev phom sij kev nyab xeeb los ntawm kev kub dhau hauv zos.
2, Lub neej ntev hauv qhov chaw kub siab
Thaum kub txog 1350 ℃, feem ntau cov khoom siv hlau twb tau mos thiab deformed lawm, thaum silicon carbide ceramics tseem tuaj yeem tswj tau qhov kev ua haujlwm zoo. Qhov kev tiv thaiv kub siab zoo no los ntawm kev sib txuas covalent muaj zog hauv cov khoom siv, zoo li kev tsim lub tsev me me uas tsis tuaj yeem rhuav tshem. Qhov tsis tshua muaj yog tias nyob rau hauv qhov kub siab oxidation ib puag ncig, ib txheej tiv thaiv silica ntom ntom tsim rau ntawm nws qhov chaw, tsim ib qho "daim ntaub thaiv tiv thaiv".
3, Tus 'Vaj Ntxwv Ua Siab Ntev' ntawm Kev Ua Rog Ua Siab Ntev Kub Siab
Hauv kev sib tw khiav marathon ntawm qhov kub thiab txias siab, ntau yam khoom siv tau poob qis vim yog cua sov ntev, thaum cov khoom siv silicon carbide ceramics ua rau pom kev ruaj khov. Qhov zais cia yog nyob rau hauv qhov tsim ciam teb tshwj xeeb - ib qho qauv network peb-seem uas tsim los ntawm kev siv tshuab sintering, uas zoo li txuas ntau lab tus "anchor points" rau cov khoom siv. Txawm tias tom qab ntau txhiab teev ntawm kev ci kub siab, nws tseem tuaj yeem xauv qhov ruaj khov ntawm microstructure. Qhov cwj pwm no ua rau nws yog qhov kev xaiv zoo tshaj plaws los hloov cov khoom siv hlau ib txwm muaj hauv cov xwm txheej xws li cov menyuam cam khwb cia tas mus li hauv kev lag luam metallurgical thiab cov khoom siv thauj khoom kub siab hauv cov khoom siv tshuaj lom neeg. Nws txhais qhov "kub siab tsis ploj" txhais li cas nrog "lub zog tawv".
Thaum koj lub cuab yeej xav tau kev sib tw rau qhov kub thiab txias, cov khoom siv reaction sintered silicon carbide ceramics yuav yog 'tus tswj kub' uas ntseeg tau. Ua tus kws tshaj lij hauv kev lag luam tshwj xeeb hauv kev siv tshuab reaction sintering,Shandong Zhongpengsiv ntau yam thev naus laus zis patented los txhim kho lub zog kho tshuab thiab kev ua haujlwm ntawm cov ntaub ntawv thaum tswj cov khoom zoo heev thermal. Qhov kev tshawb pom tshiab no tsis yog tsuas yog txo cov nqi tsim khoom xwb, tab sis kuj qhia txog kev siv dav dua rau silicon carbide ceramics hauv cov teb kev lag luam tshiab.
Lub sijhawm tshaj tawm: Tsib Hlis-16-2025