Abstract
It has been shown recently that low frequency Internal Damping (ID) is a promising technique in order to characterize the mechanical interaction between hard particles and matrix in microheterogeneous materials. The aim of this paper is to present new results showing that such an ID depends strongly on the properties of the particle-matrix interfacial region. For that purpose, aluminum MMCs have been elaborated with different conditions to modify the particle-matrix interfacial region. In this paper, first, the ID spectra for these various materials are presented. Second, the result of some Transmission Electron Microscopy (T.E.M.) investigations of the interfacial region, which have been undertaken in order to understand its influence on ID, is presented.
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