17. Multilayer EBC for Silicon Nitride

  1. Dongming Zhu,
  2. Uwe Schulz,
  3. Andrew Wereszczak and
  4. Edgar Lara-Curzio
  1. C. A. Lewinsohn,
  2. Q. Zhao and
  3. B. Nair

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291320.ch17

Advanced Ceramic Coatings and Interfaces: Ceramic Engineering and Science Proceedings, Volume 27, Issue 3

Advanced Ceramic Coatings and Interfaces: Ceramic Engineering and Science Proceedings, Volume 27, Issue 3

How to Cite

Lewinsohn, C. A., Zhao, Q. and Nair, B. (2006) Multilayer EBC for Silicon Nitride, in Advanced Ceramic Coatings and Interfaces: Ceramic Engineering and Science Proceedings, Volume 27, Issue 3 (eds D. Zhu, U. Schulz, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291320.ch17

Author Information

  1. Ceramatec Inc. Salt Lake City, UT, 84119

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080535

Online ISBN: 9780470291320

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Keywords:

  • PDC;
  • SIC;
  • EBC;
  • NASA;
  • ASTM

Summary

The lifetime of silicon-based ceramic components in turbine engine applications are limited by hydrothermal corrosion.1.2 Materials with adequate resistance to hydrothermal corrosion do not possess the required mechanical properties to be used as engine components, but may perform satisfactorily as coatings'. Reliable coatings of many candidate materials are not possible due to significant property mismatches with potential substrate materials. Likewise, interlayers, and methods of applying them, to accommodate property mismatches, must meet stringent requirements. This paper describes multilayer, environmental barrier coatings (EBC) with sufficient adhesion, environmental and thermal stability, and processing robustness to provide hydrothermal corrosion resistance to silicon nitride components.