A slow atomic diffusion process in high-entropy glass-forming metallic melts

Chen Changjiu; Wong Kaikin; Krishnan Rithin P.; Embs Jan P.; Chathoth Suresh M.

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A slow atomic diffusion process in high-entropy glass-forming metallic melts

机译：高熵玻璃金属熔体中的慢原子扩散过程

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摘要

Quasi-elastic neutron scattering has been used to study atomic relaxation processes in high-entropy glass-forming metallic melts with different glass-forming ability (GFA). The momentum transfer dependence of mean relaxation time shows a highly collective atomic transport process in the alloy melts with the highest and lowest GFA. However, a jump diffusion process is the long-range atomic transport process in the intermediate GFA alloy melt. Nevertheless, atomic mobility close to the melting temperature of these alloy melts is quite similar, and the temperature dependence of the diffusion coefficient exhibits a non-Arrhenius behavior. The atomic mobility in these high-entropy melts is much slower than that of the best glass-forming melts at their respective melting temperatures.

机译：准弹性中子散射已被用于研究具有不同玻璃形成能力（GFA）的高熵玻璃形成金属熔体的原子松弛过程。平均弛豫时间的动量转移依赖性显示了合金中的高度集体原子输送过程，最高和最低的GFA。然而，跳跃扩散过程是中间GFA合金熔体中的远程原子输送过程。然而，靠近这些合金熔体的熔化温度的原子迁移性非常相似，并且扩散系数的温度依赖性表现出非arrenius行为。这些高熵熔体中的原子迁移率远比在它们各自的熔化温度下最佳玻璃形成熔体的速度慢得多。

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来源
《Journal of Physics, D. Applied Physics: A Europhysics Journal》 |2018年第14期|共6页
作者
Chen Changjiu; Wong Kaikin; Krishnan Rithin P.; Embs Jan P.; Chathoth Suresh M.;
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作者单位

City Univ Hong Kong Dept Phys Hong Kong Hong Kong Peoples R China;

City Univ Hong Kong Dept Phys Hong Kong Hong Kong Peoples R China;

City Univ Hong Kong Dept Phys Hong Kong Hong Kong Peoples R China;

Paul Scherrer Inst Lab Neutron Scattering &

Imaging CH-5232 Villigen Switzerland;

City Univ Hong Kong Dept Phys Hong Kong Hong Kong Peoples R China;

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原文格式 PDF
正文语种 eng
中图分类应用物理学;
关键词
high-entropy alloy; neutron scattering; atomic relaxation;

机译：高熵合金;中子散射;原子松弛;

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1. A slow atomic diffusion process in high-entropy glass-forming metallic melts [J] . Chen Changjiu, Wong Kaikin, Krishnan Rithin P., Journal of Physics, D. Applied Physics: A Europhysics Journal . 2018,第14期

机译：高熵玻璃金属熔体中的慢原子扩散过程
2. Melts of CrCoNi-based high-entropy alloys: Atomic diffusion and electronic/atomic structure from ab initio simulation [J] . Ding Jun, Asta Mark, Ritchie Robert O. Applied Physics Letters . 2018,第11期

机译：CrCoNi基高熵合金的熔体：从头算模拟的原子扩散和电子/原子结构
3. The Electromigration, Thermal Convection, and Electroconvection, Diffusion of Atoms and Atomic Groupings in Melts. 2. Regularity and Mechanisms of Diffusion in Metallic Melts [J] . V. I. LOZOVY, V. I. OGLOBLYA Металлофизика и новейшие технологии: Науч.-теорет. журн. . 2004,第1期

机译：熔体中的电迁移，热对流和电对流，原子扩散和原子团。 2.金属熔体扩散规律和机理
4. Evaluation of glass-forming ability for metallic melts by phase field approach [C] . Gang Wang, Dechang Zeng, Zhongwu Liu International Conference on Mechatronics and Intelligent Materials . 2012

机译：通过相场方法评估金属熔体的玻璃形成能力
5. Diffusion kinetics of water in glasses and glass-forming melts. [D] . McGinnis, Peter Bernard. 1994

机译：水在玻璃和形成玻璃的熔体中的扩散动力学。
6. Stretched and compressed exponentials in the relaxation dynamics of a metallic glass-forming melt [O] . Zhen Wei Wu, Walter Kob, Wei-Hua Wang, -1

机译：金属玻璃熔体的弛豫动力学中的拉伸和压缩指数
7. Unusual relation between glass-forming ability and thermal stability of high-entropy bulk metallic glasses [O] . M. Yang, X. J. Liu, Y. Wu, 2018

机译：玻璃形成能力与高熵散装金属眼镜的热稳定性之间的不寻常关系

A slow atomic diffusion process in high-entropy glass-forming metallic melts

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