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Aluminum Oxide Films for Thermo-Oxidative Protection of Polyimide-Based Composites

Published online by Cambridge University Press:  15 February 2011

Larry M. Miller  and
Daniel A. Gulino
Larry M. Miller
Affiliation:
Department of Chemical Engineering and Condensed Matter and Surface Science Program, Ohio University, Athens, OH 45701
Daniel A. Gulino
Affiliation:
Department of Chemical Engineering and Condensed Matter and Surface Science Program, Ohio University, Athens, OH 45701
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Abstract

Polyimide-based composites offer one of the best opportunities to bring the advantages of high modulus-to-density ratio materials to higher temperature applications, such as jet engines. In the present work, thin films (1000 - 2000Å) of aluminum oxide have been deposited by plasma-enhanced chemical vapor deposition from aluminum triisopropoxide precursor on polyimide composite substrates. The films were characterized for stoichiometry, thickness uniformity, and adhesion, and their effectiveness in the prevention of thermo-oxidative degradation of the composite at temperatures up to 371 °C has been examined and compared to that provided by other thin film materials. These preliminary results indicate that Al2O3 is not as successful as SiO2 at preventing oxidative degradation, although significant variability in the quality of the polyimide composite substrate makes precise comparison difficult.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 305: Symposium I – High-Performance Polymers and Polymer Matrix Composites , 1993 , 191
Copyright
Copyright © Materials Research Society 1993

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