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Silicon-carbide/boron-containing coatings for the oxidation protection of graphite

✍ Scribed by Jeffrey W. Fergus; Wayne L. Worrell

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
753 KB
Volume
33
Category
Article
ISSN
0008-6223

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✦ Synopsis

Silicon carbide with its excellent oxidation resistance and chemical compatibility

with carbon is an attractive coating material for the high-temperature oxidation protection of graphite and carbon-carbon composites.

One of the major challenges in the development of protective Sic coatings is preventing oxidation of the graphite substrate due to crack formation in the Sic coating. A boron-containing inner layer can prevent significant oxidation through cracks in a Sic outer layer in 1 atm oxygen for up to nine days at 1500Β°C. The consistency of the oxidation protection is sensitive to the quality and uniformity of the coatings.

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