Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (7): 803-807.DOI: 10.1007/s40195-019-00907-1

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  • 收稿日期:2018-01-30 修回日期:2018-03-21 接受日期:2019-04-26 出版日期:2019-04-26 发布日期:2019-06-20

Atomic Structure of Cu49Hf42Al9 Metallic Glass with High Glass-Forming Ability and Plasticity

Kai Li1,2,3, Yu-Jen Chou4, Fang-Liang Gao1,2,3(), Guo-Qiang  Li1,2,3()   

  1. 1. State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
    2. Engineering Research Center on Solid-State Lighting and Its Informationisation of Guangdong Province, South China University of Technology, Guangzhou 510640, China
    3 . Department of Electronic Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
    4 . Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK
  • Received:2018-01-30 Revised:2018-03-21 Accepted:2019-04-26 Online:2019-04-26 Published:2019-06-20

关键词: Metallic glass, Radial distribution function, Electron diffraction, Density functional theory, Atomic structure

Abstract:

Electron diffraction was used to study the local atomic structure of Cu49Hf42Al9 metallic glasses (MGs). The amorphous nature of the MG was fully retained after the compression test. The partial radial distribution functions (PRDFs) of the MG structure obtained from the atomic model using reverse Monte Carlo and density functional theory optimization display that the peaks of the first nearest-neighbour distances for Cu-Cu, Hf-Cu and Hf-Hf atomic pairs were located at 2.56 ?, 2.78 ? and 3.23 ?, respectively. The wide distribution of PRDF for Hf-Hf atomic pair explained the high plasticity of the material.

Key words: Metallic glass, Radial distribution function, Electron diffraction, Density functional theory, Atomic structure