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Title: Elastic properties and atomic bonding character in metallic glasses

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{sup −}) 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{sub g}). Besides, it is found that ductile MGs correspond to Δe{sup −} 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.
Authors:
 [1] ;  [2]
  1. Institut de Physique de Rennes, IPR, UMR-CNRS 6251, Université de Rennes, campus de Beaulieu, 35042 Rennes cedex (France)
  2. Cooperative Research and Development Center for Advanced Materials, Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
Publication Date:
OSTI Identifier:
22494660
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BONDING; DENSITY; DUCTILITY; ELASTICITY; ELECTRONEGATIVITY; METALLIC GLASSES; SOLUTES; VISIBLE RADIATION