Acoustic Surface Wave Scattering:The Detection of Surface Cracks in Ceramics.

摘要

An acoustic surface wave technique for detecting surface cracks in ceramics has been devised. The technique has been demonstrated to detect individual cracks at least as small as 60 micrometers in depth, with the detectability limit for individual cracks being imposed by the size distribution of the adjacent background cracks. The attenuation of the surface wave has also been attributed (at least in structural ceramics) to the surface cracks, and preliminary correlations between attenuation and the large extremes of the crack size distribution have been reported. (Author)