Chapter 62. Processing and Oxidation Behavior of Y5Si3

  1. J. P. Singh
  1. J. Williams and
  2. M. Akine

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294437.ch62

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

Williams, J. and Akine, M. (1997) Processing and Oxidation Behavior of Y5Si3, 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.ch62

Author Information

  1. Ames Laboratory and Department of Material Science and Engineering Iowa State University, Ames IA 50011

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 materials;
  • oxidation resistance;
  • oxidation product;
  • creep resistance;
  • brittle fracture

Summary

Improvement in the oxidation resistance of Ti5Si3 by the addition of carbon, boron or oxygen prompted a similar study of Y5Si3. Because of increased reactivity, several modifications in the processing of Y5Si3 were necessary to produce samples suitable for testing. This reactivity excluded the use of carbon as a dopant. Undoped Y5Si3 showed poor oxidation resistance above 700°C due to mechanical failure under stresses produced by growth of the oxidation product. The product consisted of an external layer of Y2O3 and an underlying layer rich in YSi2. Y5Si3 doped with boron or oxygen showed no improvement in oxidation resistance. Lack of improvement is possibly due to a notably higher stability and faster growth rate of Y2O3 over SiO2.