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

Journal Article · Mon Feb 09 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4908122· OSTI ID:22412605

Jiao, W.; Lan, S. ^[1]; Pan, S. P. ^[2]; Lu, Z. P. ^[3]

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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)

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.

• OSTI ID: 22412605
• Journal Information: Applied Physics Letters, Vol. 106, Issue 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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