Chapter 51. Continuous Fiber Reinforced Reaction Sintered Silicon Nitride Composites
- John B. Wachtman Jr.
Published Online: 26 MAR 2008
Copyright © 1993 The American Ceramic Society
Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10
How to Cite
Starr, T. L., Mohr, D. L., Lackey, W. J. and Hanigofsky, J. A. (2008) Continuous Fiber Reinforced Reaction Sintered Silicon Nitride Composites, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314234.ch51
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1993
Print ISBN: 9780470375273
Online ISBN: 9780470314234
Silicon nitride matrix composites have been fabricated using the reaction sintering process. Fabric reinforced laminates and filament wound plates and tubular shapes have been produced. In each case, an attritor milled silicon powder slurry is infiltrated into ceramic fiber preforms or tows, which are subsequently assembled to form a 3-D structure. The matrix can then be reaction sintered at moderate temperature (1200°C) to form composites which have properties comparable to CVI densified composites, with reasonable strengths and graceful composite fracture behavior.
Critical factors in achieving good composite properties are effective impregnation of the multi-filament tows, fiber stability during processing, and fiber-matrix interfacial properties in the composite. Composite fabrication conditions and their relationship to composite density, pore size distribution, and mechanical properties have been examined. The influence of processing conditions on fiber properties and the use of fiber coatings to influence stability during processing and interfacial properties have also been investigated.