A test method for probing oxidation embrittlement in ceramic‐matrix composites has been devised and demonstrated for three composites: SiC/magnesium aluminosilite, SiC/SiC, and SiC/Al 2 O 3 . The method identifies a “pest” temperature T p . The growth of an embrittled region from the surface, at T P , has been illustrated. The embrittlement mechanism involves oxygen ingress through matrix cracks and silicate formation at the fibers, causing fiber failure.
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Heredia et al. (1995) studied this question.
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