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Thermomechanical Mismatch in Ceramic‐Fiber‐Reinforced Glass‐Ceramic Composites
Author(s) -
BOROM MARCUS P.,
JOHNSON CURTIS A.
Publication year - 1987
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1987.tb04844.x
Subject(s) - materials science , composite material , mullite , ceramic , brittleness , fiber , ceramic matrix composite , glass ceramic , aluminosilicate , thermal expansion , creep , glass fiber , biochemistry , chemistry , catalysis
The thermomechanical relationship between mullite and a lithium aluminosilicate (LAS) glass‐ceramic has been studied by a technique of bimaterial dilatometry. The viscoelastic behavior of LAS was found to result in a temperature T rvsl below the glass‐transformation temperature T g at which the interfacial stresses between the materials undergo a reversal in sign. The effect of T rvsl on the high‐temperature mechanical properties of mullite or SiC fiber‐reinforced glass‐ceramic composites is discussed. It is suggested that fiber clamping by the matrix at temperatures between T rvsl and T g contributes to the brittle, high‐temperature behavior of such composites.