Design of ductile bulk metallic glasses by adding ''soft'' atoms

Journal Article · Mon Apr 02 00:00:00 EDT 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3700721· OSTI ID:22025500

Zheng, N; Pauly, S; Calin, M; Gemming, T ^[1]; Qu, R T; Zhang, Z F ^[2]; Eckert, J ^[1]

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1. IFW Dresden, Institute for Complex Materials, P.O. Box 27 01 16, D-01069 Dresden (Germany)
2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016 (China)

We propose a strategy for the design of ductile bulk metallic glasses (BMGs) through minor substitution using relatively large atoms, which make the bonding nature become more metallic and with it less shear resistant. Such a locally modified structure results in topological heterogeneity, which appears to be crucial for achieving enhanced plasticity. This strategy is verified for Ti-Zr-Cu-Pd glassy alloys, in which Cu was replaced by In, and seems to be extendable to other BMG systems. The atomic-scale heterogeneity in BMGs is somewhat analog to defects in crystalline alloys and helps to improve the overall plasticity of BMGs.

• OSTI ID: 22025500
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 14 Vol. 100; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
COPPER ALLOYS
CRYSTAL DEFECTS
DUCTILITY
INDIUM ALLOYS
METALLIC GLASSES
PALLADIUM ALLOYS
PLASTICITY
POISSON RATIO
SHEAR
TITANIUM ALLOYS
ZIRCONIUM ALLOYS