A novel technique for measuring interphase recession in ceramic matrix composites (CMCs) due to oxidation is described. The technique involves fiber push-in testing and analysis of the load-displacement curves. Fiber push-in tests are conducted on carbon-coated Hi-Nicalon SiC fibers in a CVI SiC matrix, where the carbon interphase had recessed due to oxidation. Estimates of interphase recession distances from analysis of fiber push-in tests are in reasonable agreement with measurements made by optical microscopy. Besides measuring the recession distance, the fiber push-in test can be used to investigate environmental effects on fiber bridging.
Revised: January 17, 2011 |
Published: April 1, 2001
Citation
Lewinsohn C.A., C.H. Henager, R.H. Jones, and J.I. Eldridge. 2001.MEASURING INTERPHASE RECESSION BY FIBER PUSH-IN TESTING.Journal of the American Ceramic Society 84, no. 4:866-868.PNNL-SA-33612.