Highly collective atomic transport mechanism in high-entropy glass-forming metallic liquids
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Pages (from-to) | 44-47 |
Number of pages | 4 |
Journal / Publication | Journal of Materials Science and Technology |
Volume | 35 |
Issue number | 1 |
Online published | 15 Sept 2018 |
Publication status | Published - Jan 2019 |
Link(s)
Abstract
Quasielastic neutron scattering (QENS) has been used to study the atomic relaxation process and microscopic transport mechanism in high-entropy glass-forming metallic (HE-GFM) liquids. Self-intermediate scattering functions obtained from the QENS data show unusually large stretching, which indicates highly heterogeneous atomic dynamics in HE-GFM liquids. In these liquids, a group of atoms over a length scale of about 21 Å diffuses collectively even well above the melting temperature. However, the temperature dependence of the diffusion process in one of the HE-GFM liquid is Arrhenius, but in the other HE-GFM liquid is non-Arrhenius. Although the glass-forming ability of these HE-GFM liquids is very poor, the diffusion coefficients obtained from the QENS data indicate the long-range atomic transport process is much slower than that of the best metallic glass-forming liquids at their melting temperatures.
Research Area(s)
- Atomic relaxation, Diffusion, High-entropy alloy, Neutron scattering
Citation Format(s)
Highly collective atomic transport mechanism in high-entropy glass-forming metallic liquids. / Chen, Changjiu; Wong, Kaikin; P. Krishnan, Rithin et al.
In: Journal of Materials Science and Technology, Vol. 35, No. 1, 01.2019, p. 44-47.
In: Journal of Materials Science and Technology, Vol. 35, No. 1, 01.2019, p. 44-47.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review