Abstract
Nondestructive evaluation (NDE) of ceramic matrix composites is essential to develop reliable ceramics for industrial applications. In this work, C-scan image analysis has been used to nondestructively characterize surface cracks in SiC/SiC composite ceramics. The possibility of detecting surface cracks was evaluated experimentally using ultrasonic equipment of μ-SDS with a probe of 170MHz. The defocus method could detect the shape of surface cracks. As a whole, when the defocus method for the probe was used, we conclude that there is a good possibility of detecting surface cracks.
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