Chapter 36. Mechanisms of Hot Corrosion of a Silicon Carbide Fiber-Reinforced Glass-Ceramic

  1. John B. Wachtman Jr.
  1. Atul Kumar1,
  2. Alan G. Fox1 and
  3. Shaio-Wen Wang2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314876.ch36

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 17, Issue 4

Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 17, Issue 4

How to Cite

Kumar, A., Fox, A. G. and Wang, S.-W. (1996) Mechanisms of Hot Corrosion of a Silicon Carbide Fiber-Reinforced Glass-Ceramic, in Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - B: Ceramic Engineering and Science Proceedings, Volume 17, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314876.ch36

Author Information

  1. 1

    Department of Mechanical Engineering, Naval Postgraduate School, Monterey, CA 93943, U.S.A.

  2. 2

    Aircraft Division, Naval Air Warfare Center, Warminster, PA 18974, U.S.A.

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1996

ISBN Information

Print ISBN: 9780470375433

Online ISBN: 9780470314876

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Keywords:

  • hot corrosion;
  • fiber-reinforced;
  • calcium aluminosilicate;
  • traditional superalloys;
  • naval gasturbine engines

Summary

Hot corrosion of a SiC (Nicalon) fiber-reinforced calcium aluminosilicate (CAS) has been investigated by x-ray diffraction and scanning electron microscopy. Samples of SiC/CAS and monolithic CAS were hot corroded by liquid sodium sulfate at 900°C for 50 hours in both air and argon. Corrosion damage in monolithic CAS was less severe as compared with the composite in both air and argon. The mechanisms of corrosion are discussed in terms of the kinetics of the dissociation of the sodium sulfate and its reaction with both the oxidized silicon carbide fibers and the CAS matrix.