Abstract
Acoustic emission (AE) is a technique which has been used to detect and monitor damage in ceramic matrix composites (CMCs). An overview of AE itself and how it has been used for damage monitoring in CMCs is highlighted. Some specific examples of the use of AE to monitor and assess matrix cracking in CMCs is demonstrated and how that has been used to supplement mechanical behavior modeling and a relationship for life-limiting stress states caused by oxidation at elevated temperatures. Specific techniques for determining the location of AE events and the limitations of sound travel due to attenuation are outlined in addition to the use of frequency content and other classification techniques to try to specify damage mechanisms with AE content.
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