ISSN: 0884-6804
CODEN: JCTRER
Page Count: 6

The Effect of a Coating on the Thermo-Oxidative Stability of Celion 6000 Graphite Fiber/PMR 15 Polyimide Composites
Hurwitz, FI
Research chemist and metallurgist, NASA Lewis Research Center, OH

Whittenberger, JD
Research chemist and metallurgist, NASA Lewis Research Center, OH

Abstract

The thermo-oxidative stability in air at 316°C of unidirectional uncoated and aluminum coated Celion 6000 graphite fiber/PMR 15 polyimide composites has been determined for exposure times up to nominally 2000 h. Comparison of the weight loss data and microstructural integrity reveals that a thin aluminum-foil coating can provide significant protection from oxidation. A quantitative description of the average depth of the reaction zone and the maximum length of cracks produced during oxidation as a function of time in uncoated Celion 6000/PMR 15 are given.

Keywords:
composite materials, aluminum foil, graphite composites, carbon fibers, oxidizing atmospheres

Paper ID: CTR10808J
DOI: 10.1520/CTR10808J
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