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Facility for Continuous CVD Coating of Ceramic Fibers

Published online by Cambridge University Press:  15 February 2011

Arthur W. Moore*
Affiliation:
Union Carbide Coatings Service Corporation, 12900 Snow Road, Parma, OH 44130
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Extract

The development of new and improved ceramic fibers has spurred the development and application of ceramic composites with improved strength, strength/weight ratio, toughness, and durability at increasingly high temperatures. For many systems, the ceramic fibers can be used without modification because their properties are adequate for the chosen application. However, in order to take maximum advantage of the fiber properties, it is often necessary to coat the ceramic fibers with materials of different composition and properties. Examples include (1) boron nitride coatings on a ceramic fiber, such as Nicalon silicon carbide, to prevent reaction with the ceramic matrix during fabrication and to enhance fiber pullout and increase toughness when the ceramic composite is subjected to stress[l]; (2) boron nitride coatings on ceramic yarns, such as Nicalon for use as thermal insulation panels in an aerodynamic environment, to reduce abrasion of the Nicalon and to inhibit the oxidation of free carbon contained within the Nicalon[2]; and (3) ceramic coatings on carbon yarns and carbon-carbon composites to permit use of these high-strength, high-temperature materials in oxidizing environments at very high temperatures[3,4].

Type
Research Article
Copyright
Copyright © Materials Research Society 1992

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References

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2. Moore, A. W., Contract NAS2-13109(JWS), NASA Ames Research Center, to be published (1992).Google Scholar
3. Strife, J. R. and Sheehan, J.E., Amer. Ceram. Soc. Bull. 67, 369 (1988).Google Scholar
4. Gee, S. M. and Little, J. A., J. Mats. Sci. 26, 1093 (1991).CrossRefGoogle Scholar
5. Matsuda, T., J. Mats. Sci. 24 2353 (1989).CrossRefGoogle Scholar