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Title: Propensity of bond exchange as a window into the mechanical properties of metallic glasses

We investigated the mechanical properties of Zr-Cu-Al bulk metallic glasses, by compression experiment and molecular dynamics simulations. From the simulation, we found that the large, solvent atom, Zr, has high propensity of bond exchange compared to those of the smaller solute atoms. The difference in bond exchange is consistent with the observed disparity in mechanical behaviors: Zr-rich metallic glass exhibits low elastic modulus and large plastic strain. X-ray photoelectron spectroscopy measurements suggest that the increased propensity in bond exchange is related to the softening of Zr bonds with increasing Zr content.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Department of Physics and Materials Science, City University of Hong Kong, Hong Kong (China)
  2. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024 (China)
  3. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083 (China)
Publication Date:
OSTI Identifier:
22412605
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM ALLOYS; ATOMS; COMPARATIVE EVALUATIONS; COMPRESSION; COPPER ALLOYS; MECHANICAL PROPERTIES; METALLIC GLASSES; MOLECULAR DYNAMICS METHOD; PLASTICITY; SOLUTES; SOLVENTS; STRAINS; X-RAY PHOTOELECTRON SPECTROSCOPY; ZIRCONIUM ALLOYS