Chapter 92. Controlling Microstructures in ZrO2(Y2O3)-Al2O3 Eutectic Fibers

  1. John B. Wachtman Jr.
  1. E. L. Courtright1,
  2. J. S. Haggerty2 and
  3. J. Sigalovsky2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314180.ch92

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

How to Cite

Courtright, E. L., Haggerty, J. S. and Sigalovsky, J. (1993) Controlling Microstructures in ZrO2(Y2O3)-Al2O3 Eutectic Fibers, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch92

Author Information

  1. 1

    Pacific Northwest Laboratory Richland, WA 99352

  2. 2

    Massachusetts Institute of Technology Cambridge, MA 02139

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375266

Online ISBN: 9780470314180

SEARCH

Keywords:

  • eutectic oxide;
  • microstructures;
  • significantly;
  • diameter;
  • solidified

Summary

Unidirectionally solidified eutectic oxide fibers having lamellar or fibrous microstructures are potential reinforcements for ceramic composites. To achieve desired property levels, processing conditions must induce coupled growth between the two phases to produce structures having highly oriented interwoven single crystals with large length-to-diameter ratios and low interfacial energies. The conditions required to achieve planar growth fronts for ZrO2(Y2O3)-Al2O3 eutectic compositions were explored using the laser heated floating zone (LHFZ) process. Room temperature strengths in excess of 2 GPa were measured, and post-growth annealing at 1570°C did not significantly reduce the strengths.