Chapter 45. Environmental Limits for High-Temperature Si3N4-Based Ceramics

  1. John B. Wachtman Jr.
  1. S. Mason1,
  2. M. H. Lewis2 and
  3. C. J. Reed2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470310557.ch45

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 7/8

A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 7/8

How to Cite

Mason, S., Lewis, M. H. and Reed, C. J. (1989) Environmental Limits for High-Temperature Si3N4-Based Ceramics, in A Collection of Papers Presented at the 13th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 10, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310557.ch45

Author Information

  1. 1

    Rolls-Royce plc, Derby, DE2 8BJ, U.K.

  2. 2

    University of Warwick Centre for Advanced Materials Coventry, DV4 7AL, U.K.

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780470374863

Online ISBN: 9780470310557

SEARCH

Keywords:

  • chemical vapor deposition;
  • fiber-reinforced ceramic composites;
  • chemical vapor infiltration;
  • high fracture toughness;
  • carbon-carbon composites

Summary

The high-temperature limit for application of β-Si3N4-based ceramics is frequently dictated by the oxidizing and corrosive operational environment. This problem is exemplified for Sialon ceramics by the reversion of a crystalline matrix phase to the liquid state in oxidizing environments or by the formation interface in corrosive environments leading to a large reduction in strength. Palliative treatments, involving the formation of CVD diffusion barriers of Si3N4 and SiC, have been investigated.