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Push‐Out Tests on a New Silicon Carbide/Reaction‐Bonded Silicon Carbide Ceramic Matrix Composite
Author(s) -
Curtin William A.,
Eldridge Jeffrey I.,
Srinivasan Gajawalli V.
Publication year - 1993
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.1151-2916.1993.tb07768.x
Subject(s) - materials science , silicon carbide , composite material , ceramic matrix composite , composite number , fiber , ceramic , ultimate tensile strength , abrasion (mechanical) , coating , silicon , matrix (chemical analysis) , metallurgy
Fiber push‐out tests have been performed on a ceramic matrix composite consisting of Carborundum sintered SiC fibers, with a BN coating, embedded 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 τ∼ 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 obtained here and known fiber strengths, to demonstrate the good composite behavior predicted for this material.