Chapter 57. High Temperature Strength and Toughness of Electrophoretically Deposited Alumina/Lanthanum Aluminate Laminates

  1. John B. Wachtman Jr.
  1. Melinda Bissinger,
  2. O. Prakash,
  3. Partho Sarkar and
  4. Patrick S. Nicholson

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314555.ch57

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5

How to Cite

Bissinger, M., Prakash, O., Sarkar, P. and Nicholson, P. S. (1994) High Temperature Strength and Toughness of Electrophoretically Deposited Alumina/Lanthanum Aluminate Laminates, in Proceedings of the 18th Annual Conference on Composites and Advanced Ceramic Materials - B: Ceramic Engineering and Science Proceedings, Volume 15, Issue 5 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314555.ch57

Author Information

  1. Ceramic Research Group Dept. of Materials Engineering, McMaster University, Ontario, Canada

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375334

Online ISBN: 9780470314555

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Keywords:

  • laminar ceramic composite;
  • electrophoretic deposition;
  • microstructure;
  • mechanical behavior;
  • zirconia-toughened alumina

Summary

Laminar ceramic composites with layers as thin as 2 μm with > 200 layers total and dense interfaces were synthesized by electrophoretic deposition. The microstructure and mechanical behavior of the zirconia-toughened alumina (ZTA) / La-aluminate system was studied by electron microscopy, microindentation and 4-point bend tests at 25°C and 1300°C. Strength values obtained at these temperatures are 792 MPa and 486 MPa respectively. Crack paths emanating from Vickers indents show increased toughness of the laminate as compared with the alumina monolith.