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Effects of Anti-Oxidant Migration on Friction and Wear of C/C Aircraft Brakes

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Abstract

The surfaces of carbon-carbon (C/C) aircraft brakes are usually coated with anti-oxidant to protect them from oxidation. These surfaces do not include the friction surfaces since it is known that when anti-oxidant get onto the friction surface, the friction coefficient decreases. The anti-oxidant migration (AOM), however, happens during processing, heat treatment and application. In this study, phosphorus based anti-oxidants inhibited 3-D C/C aircraft brake system was investigated. The effects of their migration on friction and wear in the 3-D C/C brakes were revealed by sub-scale dynamometer tests and microscopic analysis. Dynamometer results showed that when AOM occurred, both landing and taxi coefficients decreased in humid environment and the wear was slightly lowered. Microscopic study showed that under high humidity conditions there was no formation of the friction film.

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Acknowledgements

The authors would like to thank the Center for Advanced Friction Studies (CAFS) (http://fricationcenter.siu.edu) at Southern Illinois University, Carbondale for the financial support of this research.

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  1. Department of Mechanical Engineering and Energy Processes, Southern Illinois University, Carbondale, USA

    Jarlen Don & Zhe Wang

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  1. Jarlen Don
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  2. Zhe Wang
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Correspondence to Jarlen Don.

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Don, J., Wang, Z. Effects of Anti-Oxidant Migration on Friction and Wear of C/C Aircraft Brakes. Appl Compos Mater 16, 73–81 (2009). https://doi.org/10.1007/s10443-008-9075-1

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