Advertisement

Journal of Materials Science

, Volume 26, Issue 4, pp 1093–1100 | Cite as

Oxidation behaviour and protection of carbon/carbon composites

  • S. M. Gee
  • J. A. Little
Papers

Abstract

The oxidation behaviour of carbon/carbon composite materials and graphite (in cube form), in flowing air, has been studied in the temperature range 500 to 1100 °C. Gasification for unprotected samples occurred at temperatures around 500 °C. SiC coatings offered only limited protection below their intrinsic protection range due to the diffusion of oxygen along microcracks. Diffusional control was more significant for thicker coatings. However, the use of boron oxide applied on an underlayer of SiC, gave good protection for extended periods at temperatures up to 1000 °C, due to microcrack sealing. The use of borate coatings, both with and without an SiC underlayer, was limited by the volatility of the borate.

Keywords

Polymer Graphite Boron Composite Material Borate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. D. Buckley,Amer. Ceram. Soc. Bull. 67 (1988) 364.Google Scholar
  2. 2.
    D. W. Mckee,Carbon 24 (1987) 551.CrossRefGoogle Scholar
  3. 3.
    E. Fitzer andR. Gapow,Amer. Ceram. Soc. Bull. 65 (1986) 326.Google Scholar
  4. 4.
    J. R. Strife andJ. E. Sheehan,ibid. 67 (1988) 369.Google Scholar
  5. 5.
    D. W. McKee,Carbon 24 (1986) 737.CrossRefGoogle Scholar
  6. 6.
    Idem, in “Chemistry and Physics of Carbon”, Vol. 16 (Marcel Dekker, New York, 1981) p. 1.Google Scholar
  7. 7.
    I. Jawed andD. C. Nagle,Mater. Res. Bull. 21 (1986) 1391.CrossRefGoogle Scholar
  8. 8.
    P. Ehrburger, P. Baranne andJ. Lahaye,Carbon 24 (1986) 495.CrossRefGoogle Scholar
  9. 9.
    G. Savage,Metals and Materials September (1988) 544.Google Scholar
  10. 10.
    K. L. Luthra,Carbon 26 (1988) 217.CrossRefGoogle Scholar
  11. 11.
    A. R. Ubbelhode andF. A. Lewis, “Graphite and its crystal compounds” (Oxford University Press, Oxford, 1960).Google Scholar

Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • S. M. Gee
    • 1
  • J. A. Little
    • 1
  1. 1.Department of Materials Science and MetallurgyUniversity of CambridgeCambridgeUK

Personalised recommendations