Chapter 26. A Preceramic Polymer Route to Molded SiC Ceramic Parts
- 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
Semen, J. and Loop, J. G. (1991) A Preceramic Polymer Route to Molded SiC Ceramic Parts, 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.ch26
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1991
Print ISBN: 9780470375105
Online ISBN: 9780470313848
A polysilazane preceramic polymer, which yields amorphous Si-N-C ceramic material when pyrofyzed, was investigated as a binder for SiC powder in dry pressing formulations. For formulations containing 15-30 wt% polysilazane binder, the nonoxidative thermal crosslinking/pyrolysis of the molded parts at up to 1300°C produced an SiC-particulate composite material in which the dominant microstructural feature was a high level of nanoporosity in the Si-N-C matrix phase. Ongoing efforts to characterize the mechanical, physical, and microstructural properties of these ceramic materials are discussed. Preliminary work on the fabrication of several structural ceramic parts is also presented to illustrate the unique processing characteristics of these materials.