(1) Ceramic fiber ntau tsis nthuav thaum rhuab
Ntau yam khoom nyob rau hauv qhov muaj cov khoom ntawm thermal expansion thiab contraction. Txawm li cas los xij, cov fiber ntau ceramic yuav tsis nthuav tawm tom qab ua kom sov, tab sis tseem yuav muaj qhov shrinkage ntawm 0.03. Yog vim li cas nyob rau hauv cov yam ntxwv ntawm cov ceramic fiber nws tus kheej.
Cov qauv ntawm ceramic fiber yog cov qauv sib xyaw ua ke ntawm cov khoom siv fiber ntau thiab cua, thiab nws cov microstructure yog tus cwj pwm nyob rau hauv tias ob qho tib si theem khoom thiab cov roj theem muaj nyob rau hauv daim ntawv ntawm ib ntus. Nyob rau hauv cov qauv no, cov khoom muaj nyob rau hauv daim ntawv ntawm fibers nrog ib tug txoj kab uas hla ntawm 2 mus rau 5 Um thiab ib tug ntev ntawm 30 mus rau 250 mm, thiab ua ib tug nruam txheej txheej pob txha, thaum lub roj theem yog tsis tu ncua tam sim no nyob rau hauv lub cev pob txha sib txawv. cov khoom siv fiber ntau, thiab qhov porosity ntau dua 90%.
Yog li ntawd, kev nthuav dav ntawm ceramic fiber tom qab cua sov yuav muab tais tseg los ntawm nws tus kheej qhov hws, thiab nws yuav tsis pom tseeb. Qhov no yog vim li cas vim li cas cov khoom siv fiber ntau ceramic tsis nthuav tawm tom qab ua kom sov.
(2) Ceramic fiber ntau los tiv thaiv shrinkage ntawm qhov kub thiab txias
Nyob rau hauv tus txheej txheem ntawm kub kub rauv daim ntawv thov ntawm ceramic fiber cov khoom, vim nyob rau hauv lub sij hawm ntev kub kub ib puag ncig, cov fiber ntau filaments constituting cov khoom theem skeleton yuav vau vim lawv tus kheej qhov hnyav los yog nkig tawg, ua rau lub cev qhuav dej, kev sib sau ua ke ntawm fiber ntau filaments, thiab txo qhov chaw tsis muaj dab tsi. Yog li, cov khoom siv fiber ntau ceramic yuav muaj qee qhov shrinkage, tus nqi shrinkage feem ntau tsawg dua 0.03.
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