Acousto-ultrasonics, a relatively new approach for nondestructive evaluation (NDE) of material components, is particularly promising for characterization of mechanical properties and detection of defects in composites. This paper describes application of the technique, which measures the ability of a material component to transmit and/or sustain elastic waves, to characterizing fiber-matrix interfaces in ceramic matrix composites. Experimental measurement techniques and data processing and analysis methods used for the study are presented along with observed correlations between material properties and measured acousto-ultrasonic parameters.

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