Chapter 61. Long-Term Durability of Mollite-Coated Silicon-Based Ceramics

  1. John B. Wachtman Jr.
  1. Kang N. Lee and
  2. Robert A. Miller

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314500.ch61

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4

How to Cite

Lee, K. N. and Miller, R. A. (1994) Long-Term Durability of Mollite-Coated Silicon-Based Ceramics, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - A: Ceramic Engineering and Science Proceedings, Volume 15, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314500.ch61

Author Information

  1. NASA-Lewis Research Center Cleveland, OH 44135

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375327

Online ISBN: 9780470314500

SEARCH

Keywords:

  • silicon-based;
  • mullite-coated;
  • silicon-based;
  • protective;
  • oxidation

Summary

Refractory oxide coatings on silicon-based ceramics is a promising approach to improve the environmental durability of silicon-based ceramics. The long-term durability of mullite-coated silicon-based ceramic was investigated by cyclic oxidation between RT and 1200–1400°C in air. A newly developed, fully-crystalline mullite coating substantially reduced the cyclic oxidation rate of the underlying Sic substrate. Limited reaction between the mullite coating and silica scale was observed, which is not expected to cause any long-term chemical instability.