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Materials Characterization with the Acoustic Microscopy

: Hirsekorn, S.; Pangraz, S.


Applied Physics Letters 64 (1994), pp.1632
ISSN: 0003-6951
ISSN: 1077-3118
Journal Article
Fraunhofer IZFP ()
acoustic microscopy; akustische Mikroskopie; ceramic; elastic property; elastische Eigenschaft; Keramik; nondestructive testing; Ultraschall; ultrasound; zerstörungsfreie Prüfung

The material signature of the acoustic microscope in reflexion is calculated taking into account exactly abberation and phase shifts caused by different sound path lengths. The results allow to evaluate elastic material properties from the distance between an interference maximum and the maximum from specular reflexion of measured V(z) curves. This is necessary if rigid materials such as ceramics are investigated because in thesecases high frequency acoustic microscopes yield V(z) curves with one maximum only besides that from specular reflexion.