Chapter 36. Functionally Gradient Nial/Al2O3 Structures

  1. John B. Wachtman Jr.
  1. D. P. Miller1,
  2. J. J. Lannutti1 and
  3. R. N. Yancey2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470313954.ch36

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8

How to Cite

Miller, D. P., Lannutti, J. J. and Yancey, R. N. (1994) Functionally Gradient Nial/Al2O3 Structures, in Proceedings of the 16th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 13, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313954.ch36

Author Information

  1. 1

    Department of Materials Science and Engineering Ohio State University Columbus, OH 43210–1179

  2. 2

    Advanced Research and Applications Corporation P.O. Box 1835 Fairborn, OH 45324

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1994

ISBN Information

Print ISBN: 9780470375174

Online ISBN: 9780470313954

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Keywords:

  • morphology;
  • composites;
  • microstructure;
  • materials;
  • solvents

Summary

Functionally gradient NiAl/alumina structures have been produced by sedimentation in organic solvents. Computed tomography (CT) characterized density and compositional gradients within the composites both during and after formation. Gradient severity was controlled by the presence of a specific additive which is completely removed prior to densification; we were able to eliminate phase separation during multi-compositional multilayer formation in spite of considerable differences in powder density and morphology. Variation of the initial alumina particle size also allowed for significant control of the final fired microstructure(s). Characterization of hot-pressed composite mechanical properties was also carried out.