Advanced Oxidation Protection System for Carbon-Carbon Composites PUBLIC ACCESS

[+] Author Affiliations
D. A. Eitman, R. W. Kidd, R. B. Dirling, Jr.

Science Applications International Corporation

Paper No. 89-GT-314, pp. V002T02A013; 4 pages
  • ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery
  • Toronto, Ontario, Canada, June 4–8, 1989
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7914-6
  • Copyright © 1989 by ASME


Carbon-carbon composites possess a number of desirable attributes including low density, high strength and stiffness at temperatures well beyond the capabilities of refractory alloys, low thermal expansion coefficient, tailorable orthotropic properties, absence of strategic materials, and resistance to thermal shock, fatigue, and brittle failures. However, for many applications of interest (such as aircraft and aerospace vehicle structure and engines) resistance to oxidation in high-temperature air or engine exhaust streams is a requirement which is not satisfied by unprotected carbon-carbon composites. The elements of an advanced oxidation protection system for carbon-carbon composites are described in this paper. The system is comprised of both an oxidation resistant coating intended to provide the primary barrier to oxygen ingress and inhibitors added to the matrix of the carbon-carbon composite to increase its oxidation resistance without significant losses in mechanical properties. The composite inhibition system is designed to be complementary to the coating and to enhance its long-term performance. A description of the principal elements of the system is presented along with recent test data and current research directions.

Copyright © 1989 by ASME
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