Oxidation kinetics of coated silicon carbide fiber-reinforced silicon carbide (SiC/SiC)

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

OSTI ID:96594

Fox, D S ^[1]

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1. National Aeronautics and Space Administration, Cleveland, OH (United States)

Silicon carbide fiber-reinforced silicon carbide (SiC/SiC) was exposed for 100 hours to dry, flowing oxygen. Oxidation kinetics were determined via thermogravimetric analysis at 981{degrees}, 1204{degrees} and 1316{degrees}C (1800{degrees}, 2200{degrees} and 2400{degrees}F). The effectiveness of three external coating systems applied for oxidation protection is discussed. In all cases, weight gains were observed, and the pyrolytic carbon interface layer remained intact. A CVD SiC external coating is the most promising due to low oxidation kinetics resulting from solid silica formation. A borosilicate glass was observed on the surface of two of the materials that have boron-containing coatings.

• OSTI ID: 96594
• Report Number(s): CONF-940416-; TRN: 95:005316-0077
• 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
PROTECTIVE COATINGS
CHEMICAL VAPOR DEPOSITION
BOROSILICATE GLASS
MICROSTRUCTURE