Feem ntau, kev cai lij choj ntawm thermal expansion thiab txias contraction yog siv rau feem ntau cov khoom. Txawm li cas los xij, cov khoom siv fiber ntau ceramic tsis tsuas yog nthuav dav tom qab ua kom sov, tab sis kuj muaj qhov shrinkage tsawg dua 3 feem pua. Yog vim li cas yog muab los ntawm cov yam ntxwv ntawm cov ceramic fiber nws tus kheej.
Lub microstructure 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 theem khoom thiab roj theem muaj nyob rau hauv daim ntawv txuas mus ntxiv. Nyob rau hauv cov qauv no, cov khoom muaj nyob rau hauv daim ntawv ntawm fibers nrog ib txoj kab uas hla ntawm 2 ~ 5um thiab ib tug ntev ntawm 30 ~ 250mm, thiab ua ib tug nruam pob txha pob txha, thaum lub roj theem muaj nyob rau hauv tsis tu ncua nyob rau hauv lub skeleton kis ntawm cov ntaub ntawv fiber, thiab cov porosity ntau dua 90 feem pua. Yog li ntawd, kev nthuav dav ntawm cov ceramic fiber ntau tom qab cua sov yuav muab tais los ntawm nws tus kheej qhov pores, thiab nws yuav tsis pom tseeb. Qhov no yog vim li cas vim li cas cov ceramic fiber module tsis nthuav thaum rhuab.
Thaum lub sij hawm daim ntawv thov ntawm cov ceramic fiber module nyob rau hauv lub kub kub rauv, vim nyob rau lub sij hawm ntev ntawm kub kub ib puag ncig, cov fiber ntau filaments uas ua rau cov khoom theem skeleton tawg vim nws tus kheej qhov hnyav los yog brittleness, ua rau lub cev qhuav dej. , kev sib sau ua ke ntawm fiber ntau filaments, thiab txo qhov tsis muaj qhov chaw. Yog li ntawd, cov khoom siv fiber ntau ceramic yuav tshwm sim los ntawm cov tsos. Qee qhov shrinkage, tus nqi shrinkage feem ntau tsawg dua 3 feem pua.
Yog li ntawd, thaum siv cov ceramic fiber module, nws yog ib qho tsim nyog yuav tsum ua raws li lub hauv paus ntsiab lus ntawm kev kub siab refractory thiab xaiv cov khoom tsim nyog kom txo tau cov linear shrinkage ntawm ceramic fiber ntau li ntau tau; Qhov thib ob, cov khoom siv fiber ntau ntxiv rau daim pam qauv yuav tsum tau compacted kom ntau li ntau tau thaum lub sij hawm tsim kho kom tsis txhob muaj qhov kub thiab txias shrinkage Qhov no ua rau qhov khoob ntawm lub qhov cub hauv ob sab phlu thiab kev puas tsuaj rau lub cub tawg; Nyob rau tib lub sijhawm, nws raug pom zoo tias thaum xaiv cov khoom siv hluav taws xob ceramic rauv hauv ob sab phlu, yuav tsum muaj cov npoo ntawm cov paj rwb fiber ntau hauv cov pam vov rau txhaws qhov khoob tom qab.
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