Oxidation of SiC whisker and platelet reinforced Al{sub 2}O{sub 3} composites and resultant mechanical properties

Conference · Sat Dec 31 00:00:00 EST 1994

OSTI ID:96595

Leakey, L A; Loutfy, R O; Withers, J C ^[1]

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1. Materials and Electrochemical Research Corporation, Tucson, AZ (United States)

The effect of oxidation of SiC whisker- or platelet-reinforced Al{sub 2}O{sub 3} composites on microstructure and mechanical properties has been investigated. It was found that short-term, high temperature oxidation conditions promote the formation of a low porosity reaction layer which results in significant increases in both strength (up to 23%) and fracture toughness (up to 176%). The extent of improvement was found to be dependent upon the thickness and porosity content of the reaction layer, starting composition, and bulk characteristics of the unoxidized composite.

• OSTI ID: 96595
• Report Number(s): CONF-940416-; CNN: Contract DAAH01-92-C-R277; TRN: 95:005316-0078
• Resource Relation: Conference: 96. annual meeting of the American Ceramic Society (ACS), Indianapolis, IN (United States), 25-28 Apr 1994; Other Information: PBD: 1994; Related Information: Is Part Of Ceramic transactions: Advances in ceramic-matrix composites II. Volume 46; Singh, J.P.; Bansal, N.P. [eds.]; PB: 1065 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
SILICON CARBIDES
OXIDATION
ALUMINIUM OXIDES
MICROSTRUCTURE
FRACTURE PROPERTIES
SINTERED MATERIALS
TEMPERATURE DEPENDENCE
POROSITY