Chapter 22. The Microstructure and Properties of Plasma-Sprayed Ceramic Composites
- John B. Wachtman Jr
Published Online: 28 MAR 2008
Copyright © 1991 The American Ceramic Society, Inc.
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
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1991
Print ISBN: 9780470375099
Online ISBN: 9780470313831
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.