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1999
Conference Paper
Titel
Measurement of Elastic and Anelastic Properties of Nanocrystalline Metals
Abstract
Due to their high content in nanocrystalline materials, the grain boundaries are expected to contribute significantly to the elastic and anelasic properties of the bulk material. Thus nanocrystalline materials lend themselves to the study of grain boundary contributions to absorption and dispersion of ultrasonic waves. We have examined nanocrystalline Pd and Cu. They exhibit an anomalously large absorption wich varies lineary with frequency.