Chapter 24. Effect of Dopants on Anisotropic Grain Growth in Oxide-Matrix Materials

  1. Ersan Ustundag and
  2. Gary Fischman
  1. T. N. Tiegs1,
  2. M. R. Snyder2,
  3. F. C. Montgomery1,
  4. J. L. Schroeder3 and
  5. D. W. Coffey1

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294567.ch24

23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures : A: Ceramic Engineering and Science Proceedings, Volume 20, Issue 3

23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures : A: Ceramic Engineering and Science Proceedings, Volume 20, Issue 3

How to Cite

Tiegs, T. N., Snyder, M. R., Montgomery, F. C., Schroeder, J. L. and Coffey, D. W. (1999) Effect of Dopants on Anisotropic Grain Growth in Oxide-Matrix Materials, in 23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures : A: Ceramic Engineering and Science Proceedings, Volume 20, Issue 3 (eds E. Ustundag and G. Fischman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294567.ch24

Author Information

  1. 1

    Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, TN 37831–6087

  2. 2

    Alfred University, Alfred, NY

  3. 3

    Ohio State University, Columbus, OH

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1999

ISBN Information

Print ISBN: 9780470375631

Online ISBN: 9780470294567

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Keywords:

  • microstructure;
  • ceramics;
  • transgranular;
  • capability;
  • conductivity

Summary

Anisotropic grain growth is of interest for altering the microstructure and improving the properties of oxide ceramics, such as alumina and mullite. The effect of several dopants (at levels from 0.5 to 7 wt. %) on the growth behavior was examined. Anisotropic growth was associated with the additions of SrO, MnO, NiO, Fe2O3 or Y2O3 in mullite and with Na2O, Na3A1F6, or La2O3 in alumina. Fracture surfaces showed predominantly transgranular fracture occurs in all of the compositions indicating strong bonding between the intergranular phase and the matrix. Only modest improvements in toughness were observed.