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Contribution of oxidation to the wear of carbon-carbon composites

✍ Scribed by H.W. Chang; R.M. Rusnak

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 340 KB
Volume: 16
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(78)90070-2

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✦ Synopsis

An investigation was made of the effects of oxidation on the wear of carbon-carbon composites for aircraft brake materials. Wear tests were performed on samples under various oxygen partial pressures, and measurements were made of wear rates in weight and thickness. Wear rate was found to increase with increasing oxygen partial pressure; the wear in air was more than 4.5 times the wear in an inert atmosphere under the conditions used in this study. At least 60% of the total weight loss was caused by oxidation, that is, direct removal by conversion of the solid to CO and COz. Furthermore, the oxidation weakened the surface and subsurface, which in turn facilitated material removal by mechanical action at the rubbing interfaces.

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