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Elastic properties and atomic bonding character in metallic glasses (2015)

T. Rouxel and Y. Yokoyama

American Institute of Physics (AIP)

In: Journal of Applied Physics

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Publication Date: 2015-07-23

Description: The elastic properties of glasses from different metallic systems were studied in the light of the atomic packing density and bonding character. We found that the electronegativity mismatch (Δe − ) between the host- and the major solute-elements provides a plausible explanation to the large variation observed for Poisson's ratio (ν) among metallic glasses (MGs) (from 0.28 for Fe-based to 0.43 for Pd-based MGs), notwithstanding a similar atomic packing efficiency (C g ). Besides, it is found that ductile MGs correspond to Δe − smaller than 0.5 and to a relatively steep atomic potential well. Ductility is, thus, favored in MGs exhibiting a weak bond directionality on average and opposing a strong resistance to volume change.

Print ISSN: 0021-8979

Electronic ISSN: 1089-7550

Topics: Physics

Published by American Institute of Physics (AIP)

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