Chapter 2. ZrO2-Reinforced MoSi2 Matrix Composites
- John B. Wachtman Jr
Published Online: 26 MAR 2008
Copyright © 1991 The American Ceramic Society, Inc.
Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 9/10
How to Cite
Petrovic, J. J., Honnell, R. E., Mitchell, T. E., Wade, R. K. and McClellan, K. J. (1991) ZrO2-Reinforced MoSi2 Matrix Composites, in Proceedings of the 15th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 12, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470313848.ch2
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1991
Print ISBN: 9780470375105
Online ISBN: 9780470313848
ZrO2 particle-MoSi2 matrix composites were fabricated by wet processing/hot pressing, using high-quality unstabilized, partially stabilized, and fully stabilized ZrO2 powders. Composite room temperature indentation fracture toughness increased with increasing volume fraction of ZrO2 reinforcement. Unstabilized ZrO2 produced the highest composite fracture toughness, 7.8 MPa-m1/2 as compared to 2.6 MPa-m1/2 for pure MoSi2 Unstabilized ZrO2 composites exhibited matrix microcracking, and the spontaneous tetragonal-to-monoclinic ZrO2 phase transformation induced significant plastic deformation in the MoSi2 matrix. Partially stabilized Zro2 produced a lesser extent of composite fracture toughening, possibly as a result of an inhomogeneous Zro2 particle distribution and presence of a glassy phase.