1971
DOI: 10.1051/jphyscol:1971250
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Influence De La Géométrie Des Éprouvettes Sur La Vitesse De Propagation Et l'ATTÉNUATION Des Ultrasons

Abstract: Les mesures des effets de module et du frottement intérieur des matériaux, dans la bande du mégahertz et aux basses températures, conduisent à prendre en compte des termes correctifs, liés en particulier à la géométrie des éprouvettes. Il est dégagé la notion d'éprouvette optimale. Une application est donnée au cas du pic de Bordoni du cuivre

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“…Experimental investigations of the Bordoni peak in silver have been carried out by Bordoni et a1 (1960), Okuda (1963a,b), Mongy et al (1965), Mecs and Nowick (1968), Besson et al (1972) and Chountas et a1 (1972). Most of the work was performed on polycrystalline material, for which the authors estimate values of the activation energy for the Bordoni peak ranging from 0.09 5 0.015 eV (Chountas et al 1972) to 0.130 f 0.008 eV (Besson et a1 1972), very similar to that for polycrystalline copper.…”
Section: Introductionmentioning
confidence: 99%
“…Experimental investigations of the Bordoni peak in silver have been carried out by Bordoni et a1 (1960), Okuda (1963a,b), Mongy et al (1965), Mecs and Nowick (1968), Besson et al (1972) and Chountas et a1 (1972). Most of the work was performed on polycrystalline material, for which the authors estimate values of the activation energy for the Bordoni peak ranging from 0.09 5 0.015 eV (Chountas et al 1972) to 0.130 f 0.008 eV (Besson et a1 1972), very similar to that for polycrystalline copper.…”
Section: Introductionmentioning
confidence: 99%