Wa. Curtin et al., PUSH-OUT TESTS ON A NEW SILICON-CARBIDE REACTION-BONDED SILICON-CARBIDE CERAMIC-MATRIX COMPOSITE, Journal of the American Ceramic Society, 76(9), 1993, pp. 2300-2304
Fiber push-out tests have been performed on a ceramic matrix composite
consisting of Carborundum sintered SiC fibers, with a BN coating, emb
edded in a reaction-bonded SiC matrix. Analysis of the push-out data,
utilizing the most complete theory presently available, shows that one
of the fiber/coating/matrix interfaces has a low fracture energy (one
-tenth that of the fiber) and a moderate sliding resistance tau almost
-equal-to 8 MPa. The debonded sliding interface shows some continuous
but minor abrasion, which appears to increase the sliding resistance,
but overall the system exhibits very clean smooth sliding. The tensile
response of a full-scale composite is then modeled, using data obtain
ed here and known fiber strengths, to demonstrate the good composite b
ehavior predicted for this material.