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Atomic structure evolution of high entropy metallic glass microwires at cryogenic temperature

DOI: 10.1016/j.scriptamat.2018.12.031 DOI Help

Authors: Hangboce Yin (Harbin Institute of Technology) , Yongjiang Huang (Harbin Institute of Technology) , Dominik Daisenberger (Diamond Light Source) , Peng Xue (Harbin Institute of Technology) , Songshan Jiang (Harbin Institute of Technology) , Weinan Ru (Harbin Institute of Technology) , Sida Jiang (Harbin Institute of Technology) , Ying Bao (Harbin Institute of Technology) , Xilei Bian (Austrian Academy of Sciences) , Xing Tong (Tohoku University) , Hongxian Shen (Harbin Institute of Technology) , Jianfei Sun (Harbin Institute of Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Scripta Materialia , VOL 163 , PAGES 29 - 33

State: Published (Approved)
Published: April 2019
Diamond Proposal Number(s): 17412

Abstract: The atomic structure evolution of Gd36Tb20Co20Al24 high entropy metallic glass microwire from room to cryogenic temperature has been studied by in-situ high energy synchrotron X-ray diffraction. During the cooling process, the atomic volume decreases. For short-range order, the coordination numbers of all atomic pairs increase. As the temperature decreases, bond lengths of large atom-small atom and small atom-small atom pairs keep decreasing whereas that of large atom-large atom pairs unexpectedly increases continuously. The mechanism of atomic structure evolution is proposed, which might be helpful for better understanding the low temperature magnetocaloric effect of high entropy metallic glasses.

Journal Keywords: High energy X-ray diffraction; High entropy metallic glass microwires; Cryogenic temperature; Coordination number; Bond length

Subject Areas: Materials

Instruments: I15-Extreme Conditions

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