Cov khoom siv refractory hnav - ceramic fiber
Apr 07, 2022
Ceramic fiber yog cov khoom siv fiber ntau ua los ntawm cov khoom siv ntuj tsim los yog cov khoom siv dag zog los ntawm cov txheej txheem sib txawv, lossis hloov los ntawm cov organic fibers los ntawm kev kho cua sov kub. Ntxiv nrog rau cov khoom siv zoo heev, nws kuj muaj qhov zoo ntawm kev tiv thaiv oxidation thiab zoo thermal stability.
1. Hom ceramic fibers
Cov ntau yam ntawm ceramic fibers feem ntau suav nrog zoo tib yam aluminium silicate fibers, high-alumina aluminium silicate fibers, polycrystalline alumina fibers, polycrystalline mullite fibers thiab high-performance ceramic fibers. Ntawm lawv, silicon carbide fiber ntau yog ib qho ntawm cov khoom siv ua haujlwm siab. Silicon carbide fiber ntau yog ib qho tseem ceeb ntawm kev ua tau zoo txhawb cov ceramic fiber rau hlau matrix thiab ceramic matrix composites. Nws muaj lub zog tensile zoo heev, nkag siab tsis kam, oxidation tsis kam, thiab kev sib raug zoo nrog ceramic matrix.
2. Txoj kev npaj ntawm ceramic fiber
A.Lub cev molding txoj kev
Melt fiber ntau txoj kev: Tom qab cov khoom raw yog yaj, cov fiber ntau yog tsim los ntawm txoj kev tshuab los yog txoj kev spinning.
Tshuab tshuab: Ua ntej, cov khoom siv raw yog yaj mus rau hauv qhov kub-kub yaj nrog lub qhov cub ua haujlwm, thiab cov kwj nyias yog tsim los ntawm qhov kub thiab txias, uas yog txau nrog cov cua kub siab. Nyob rau hauv qhov kev txiav txim ntawm high-ceev huab cua, lub molten kua yog dispersed mus rau hauv hais, thiab fibers yog tsim nyob rau hauv lub particles.
Spinning txoj kev: Lub siab kub-kub molten kua yog tsim rau hauv fibers los ntawm lub centrifugal quab yuam ntawm high-ceev kev sib hloov ntawm lub spinning log.
B. Matrix fiber tov impregnation txoj kev
Feem ntau ntawm cov matrix fibers yog viscose fibers nrog zoo hydrophilicity. Lub matrix fiber tov impregnation txoj kev yog impregnate lub matrix fiber nrog ib tug inorganic ntsev tov, thiab ces sinter tshem tawm cov matrix fiber kom tau cov ceramic fiber. Lub zog fiber ntau yog nyob ntawm qhov porosity ntawm fiber ntau thiab qhov loj ntawm cov hlau oxide nplej. Txoj kev no yog qhov yooj yim thiab yooj yim kom nrov.
Tsis tas li ntawd, nws tseem tuaj yeem npaj tau los ntawm cov tshuaj vapor deposition, tshuaj vapor cov tshuaj tiv thaiv, thiab precursor conversion txoj kev.
3. Daim ntawv thov ntawm ceramic fiber
A.Siv nyob rau hauv industrial furnaces
Raws li lub teeb yuag thiab muaj txiaj ntsig thermal rwb thaiv tsev cov ntaub ntawv, ceramic fiber yog dav siv nyob rau hauv industrial furnaces. Nws tuaj yeem txo qhov hnyav ntawm cov qauv hlau ntawm lub cub tawg thiab ua kom lub neej ua haujlwm ntev ntawm lub cub tawg.
B.Yuav siv tau raws li cov khoom siv lim
Ceramic fibers yog nyias hauv cov duab thiab tuaj yeem siv los ua cov ntaub ntawv lim. Kev siv cov lim dej ceramic hauv cov chaw tsim khoom ncaj qha los lim cov pa hluav taws kub kub tuaj yeem txo cov khoom siv thiab cov nqi kom txias cov roj ua ntej lim, thiab tuaj yeem txo cov cua sov thiab cov khoom pov tseg los ntawm kev txias.
C. Ua cov fiber ntau ceramics
Ceramic fiber ntau yog cov khoom tshwj xeeb uas tsis yog tsuas yog tiv taus qhov kub thiab txias hloov pauv yam tsis muaj kev puas tsuaj, tab sis kuj hloov cov hlau superalloys thiab ua haujlwm zoo dua li cov alloys ntawm qhov kub thiab txias, lub zog tshwj xeeb thiab cov qauv tshwj xeeb.
