OXIDATION EMBRITTLEMENT PROBE FOR CERAMIC-MATRIX COMPOSITES

Authors
HEREDIA FE MCNULTY JC ZOK FW EVANS AG
Citation
Fe. Heredia et al., OXIDATION EMBRITTLEMENT PROBE FOR CERAMIC-MATRIX COMPOSITES, Journal of the American Ceramic Society, 78(8), 1995, pp. 2097-2100
Citations number
20
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of the American Ceramic Society → ACNP
ISSN journal
00027820
Volume
78
Issue
8
Year of publication
1995
Pages
2097 - 2100
Database
ISI
SICI code
0002-7820(1995)78:8<2097:OEPFCC>2.0.ZU;2-1
Abstract
A test method for probing oxidation embrittlement in ceramic-matrix co mposites has been devised and demonstrated for three composites: SiC/m agnesium aluminosilite, SiC/SiC, and SiC/Al2O3. The method identifies a ''pest'' temperature T-p. The growth of an embrittled region from th e surface, at T-p, has been illustrated. The embrittlement mechanism i nvolves oxygen ingress through matrix cracks and silicate formation at the fibers, causing fiber failure.