Chapter 59. Processing and Mechanical Properties of Alumina Platelet Reinforced Molybdenum Disilicide Laminates

  1. John B. Wachtman Jr.
  1. S. C. Tuffé,
  2. K. P. Plucknett and
  3. D. S. Wilkinson

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314234.ch59

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10

How to Cite

Tuffé, S. C., Plucknett, K. P. and Wilkinson, D. S. (2008) Processing and Mechanical Properties of Alumina Platelet Reinforced Molybdenum Disilicide Laminates, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314234.ch59

Author Information

  1. McMaster University Department of Materials Science and Engineering Hamilton, Ontario, L8S 4L7 Canada

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375273

Online ISBN: 9780470314234

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Keywords:

  • microstructural;
  • ductility;
  • oxidation;
  • laminates;
  • energy dispersive spectroscopy

Summary

Tape-casting has been used to develop molybdenum disilicide (MoSi2)/alumina(Al2O3) platelet composites having a high degree of microstructural anisotropy. The processing conditions were selected to achieve optimum dispersion of the AL203 platelets in the MoSi2, matrix. Mechanical properties have been studied from room temperature up to 1200° C. It is observed that both toughness and strength increase, with increasing temperature up to 1100° C. Platelet pull-out was apparent in the MoSi2, matrix, contributing to a fracture toughness of ∼4.8 MPa.m1/2 at room temperature rising to ∼6.5 MPa.m1/2 at 1100°C. A substantial increase of the strength (up to 78%) has been obtained when compared with monolithic MoSi2.