Chapter 50. In Situ X-Ray Monitoring of Damage Accumulation in SiC/RBSN Tensile Specimens
- 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
Baaklini, G. Y. and Bhatt, R. T. (1991) In Situ X-Ray Monitoring of Damage Accumulation in SiC/RBSN Tensile Specimens, 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.ch50
- Published Online: 28 MAR 2008
- Published Print: 1 JAN 1991
Print ISBN: 9780470375099
Online ISBN: 9780470313831
The room temperature tensile testing of silicon carbide fiber-reinforced reaction bonded silicon nitride (SiC/RBSN) composite specimens was monitored by using in situ X-ray film radiography. Radiographic evaluation before, after, and during loading provided data on the effect of preexisting volume flaws (high-density impurities), and on the effect of local density variations on the fracture behavior of composites. Results from 1, 3, 5, and 8 composite specimens showed that X-ray film radiography can monitor damage accumulation during tensile loading. Matrix cracking, fiber-matrix debonding, and fiber pull-out were imaged throughout the tensile loading history of the specimens. Further, in situ film radiography was found to be a helpful and practical technique for estimating interfacial shear strength between the SiC fiber and the RBSN matrix by the matrix crack spacing method. It is concluded that pretest, in situ, and post-test radiography can provide for a greater understanding of ceramic matrix composite mechanical behavior, a verification of related experimental procedures, and a validation and development of related analytical models.