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Oxidation-Protection Methodology for Long-Term use of Carbon-Carbon Fiber-Matrix Composites in Oxidizing Ambients

Published online by Cambridge University Press:  11 February 2011

Ilan Golecki ,
Karen Fuentes  and
Terence Walker
Ilan Golecki
Affiliation:
Advanced Materials and Processes R&D Laboratory, Morristown, NJ 07962; Honeywell International (formerly AlliedSignal) Inc.
Karen Fuentes
Affiliation:
Engines and Systems, Torrance, CA 90504; Honeywell International (formerly AlliedSignal) Inc.
Terence Walker
Affiliation:
Aircraft Landing Systems, South Bend, IN 46628, Honeywell International (formerly AlliedSignal) Inc.
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Abstract

A methodology is described for protecting Carbon-Carbon fiber-matrix composite (C-C) components from oxidation for extended use in oxidizing ambients for lifetimes of the order of 10,000 hours, from room temperature to 650°C. This time-temperature profile is relevant to applications such as airborne heat exchangers. Weight changes of oxidation-protected, pitch-fiber based C-C coupons in flowing dry air at 650°C are presented. Two types of external protective approaches are compared: (a) multi-phase, borophosphate-based fluidizing overseal coatings applied directly to C-C, and (b) the same overseal coatings applied to CVD SiOxCy coated C-C. The latter, dual-coating approach provides an effective engineering solution for the above temperature-time profile and is particularly applicable to thin (0.1–3 mm thick), complex-shaped articles. The behavior of inert substrates (oxidized silicon) with the same overseal coatings is compared to the behavior of the C-C substrates. This approach can be applied with optional modifications to suit other environmental conditions, and other carbon-containing materials, such as carbon foams and C-SiC composites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 755: Symposium DD – Solid-State Chemistry of Inorganic Materials IV , 2002 , DD11.20
Copyright
Copyright © Materials Research Society 2003

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References

REFERENCES

Golecki, Ilan, Xue, L., Leung, R., Walker, T., Anderson, A., Dewar, D., Duncan, C. and van Horik, J., Proc. 1998 High-Temperature Electronic Materials, Devices and Sensors Conference, San Diego, CA, February 1998, Golecki, I., Kolawa, E. and Gollomp, B., eds., pp. 190–195, IEEE Publications, Catalog No. 98EX132, ISBN 0–7803–4737–5 (1998).Google Scholar
Golecki, Ilan, Xue, L., Dewar, D., Anderson, A., Duncan, C., van Horik, J., Eubank, K. and Walker, T., Proc. 23rd Annual Conference on Composites, Materials and Structures, Restricted Session, Opeka, M.M., ed., Cocoa Beach, FL, January 1999 (1999).Google Scholar