Chapter 22. The Microstructure and Properties of Plasma-Sprayed Ceramic Composites

  1. John B. Wachtman Jr
  1. K. Lapierre1,
  2. H. Herman1 and
  3. A. G. Tobin2

Published Online: 28 MAR 2008

DOI: 10.1002/9780470313831.ch22

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8

How to Cite

Lapierre, K., Herman, H. and Tobin, A. G. (2008) The Microstructure and Properties of Plasma-Sprayed Ceramic Composites, in Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313831.ch22

Author Information

  1. 1

    Department of Materials Science and Engineering State University of New York at Stony Brook Stony Brook, NY 11794

  2. 2

    Grumman Corporate Research Center Mail Stop A02–26 Bethpage, NY 11714

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780470375099

Online ISBN: 9780470313831

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Keywords:

  • microstructure;
  • plasma;
  • components;
  • atmosphere;
  • microstructure

Summary

The microstructure and properties of plasma-sprayed ceramics and ceramic matrix composites (CMCs) have been investigated. Substrate-free deposits were fabricated by plasma spraying onto expendable graphite substrates. X-ray diffractometry (XRD) and differential scanning calorimetry (DSC) were used to examine the phase content and transformations of plasma-sprayed Al2O3 Mechanical properties were measured using three-point flexural testing for both the as-sprayed and heat-treated conditions. Significant increases in modulus and strength were observed as a result of post-spray heat treatment. Having established baseline properties with respect to the pure matrix material, the effect of incorporating a second phase was examined. Ceramic matrix composites were fabricated by plasma spraying a mechanical mixture of Al2O3 and SiC particulate. Composites consisted of particulate SiC and resolidified inclusions in an Al2O3 matrix. Significant improvements in strength and modulus were achieved as a result of second phase incorporation.