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Oxidation Embrittlement Probe for Ceramic‐Matrix Composites
Author(s) -
Heredia Fernando E.,
McNulty John C.,
Zok Frank W.,
Evans Anthony G.
Publication year - 1995
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.1151-2916.1995.tb08621.x
Subject(s) - materials science , embrittlement , composite material , ceramic , ceramic matrix composite , silicate , matrix (chemical analysis) , fiber , chemical engineering , engineering
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.