Messung der inneren reibung in polykristallinen Materialien mittels Laserultraschall

: Haberer, B.; Arnold, W.; Willems, H.; Paul, M.

Abstract
A new technique is presented allowing one to measure ultrasonic absorption in a wide temperature range in polycrystalline materials and even in single crystals, by generating reverberation fields by short laser pulses, and by observing their decay using optical interferometers for detection.