Chapter 1. High Temperature Structural Silicides

  1. J. P. Singh
  1. John J. Petrovic

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294437.ch1

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

How to Cite

Petrovic, J. J. (1997) High Temperature Structural Silicides, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294437.ch1

Author Information

  1. Laboratory Fellow Ceramic Science and Technology Group MST-4 Materials Science and Technology Division Los Alamos National Laboratory Los Alamos, New Mexico 87545

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1997

ISBN Information

Print ISBN: 9780470375495

Online ISBN: 9780470294437

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Keywords:

  • structural silicides;
  • ceramic-intennetallic compounds;
  • fracture toughness;
  • heating elements;
  • turbine engine

Summary

Structural silicides have important high temperature applications in oxidizing and aggressive environments. Most prominent are MoSi2-based materials, which are borderline ceramic-intermetallic compounds. MoSi2 single crystals exhibit macroscopic compressive ductility at temperatures below room temperature in some orientations. Polycrystalline MoSi2 possesses elevated temperature creep behavior which is highly sensitive to grain size. MoSi2-Si3N4 composites show an important combination of oxidation resistance, creep resistance, and low temperature fracture toughness. Current potential applications of MoSi2-based materials include furnace heating elements, molten metal lances, industrial gas burners, aerospace turbine engine components, diesel engine glow plugs, and materials for glass processing.