Chapter 37. Creep Behavior of an Al2O3-Y3Al5O12 Eutectic Composite

  1. John B. Wachtman Jr.
  1. T. A. Parthasarathy1,
  2. T. Mah1 and
  3. L. E. Matson2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313053.ch37

14th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 9/10

14th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 9/10

How to Cite

Parthasarathy, T. A., Mah, T. and Matson, L. E. (1990) Creep Behavior of an Al2O3-Y3Al5O12 Eutectic Composite, in 14th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 11, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313053.ch37

Author Information

  1. 1

    Universal Energy Systems, Inc., Dayton, OH 45432

  2. 2

    Materials Laboratory, WRDC/MLLM, Wright-Patterson Air Force Base, Dayton, OH 45433

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1990

ISBN Information

Print ISBN: 9780470374931

Online ISBN: 9780470313053

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Keywords:

  • alumina;
  • composite;
  • temperature;
  • molybdenum;
  • hydraulic;
  • magnification

Summary

The creep behavior of an alumina-Y3Al5O12 (YAG) eutectic composite was studied in the temperature range of 1410°-1650°C. The tests were conducted under compression at constant strain rates in the range of 10−6-10−5/sec. Extrapolation of the creep data to a strain rate of 10−8/sec suggests that the composite creep rates meet the design guidelines for use as turbine blades at 1410°C and as turbine vanes at 1530°C. Single crystals of YAG and sapphire were also tested under the same conditions at 1530°C for comparison. The stronger YAG phase is found to reinforce sapphire at higher strain rates, while at lower strain rates, the composite behavior is close to or slightly less than that of sapphire.