Chapter 29. Silicon Carbide/SRBSN 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
Razzell, A. G. and Lewis, M. H. (2008) Silicon Carbide/SRBSN 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.ch29
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1991
Print ISBN: 9780470375099
Online ISBN: 9780470313831
Ceramic matrix composites have been produced using unidirectionally aligned Textron SCS-6 fibers in a sintered reaction bonded silicon nitride (SRBSN) matrix. A tape casting technique was used to produce a prepreg sheet that could be cut and stacked to form a lay up. Sintering aids were MgO, Al2O3, and Y2O3 either singly or in combination, final sintering being carried out under pressure at temperatures up to 1750°C. The three-point bend strength of the material vaired between 448 and 513 MPa and showed no variation with oxidation time at 1000°C up to 25 hours. Interfacial shear strength measured by indentation was 4 MPa; some samples had a reaction layer at the interface and a shear strength of >8 MPa. Within sections 6 mm from exposed fiber ends the interfacial carbon layers were partially removed and the interfacial shear strength was reduced with increasing oxidation time.