Microscopic insight into the origin of enhanced glass-forming ability of metallic melts on micro-alloying

被引：42

作者：

Chen, C. J. ^{[1
]}

Podlesnyak, A. ^{[2
]}

Mamontov, E. ^{[3
]}

Wang, W. H. ^{[4
]}

Chathoth, S. M. ^{[1
]}

机构：

[1] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

[2] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA

[3] Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA

[4] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 13期

关键词：

LIQUIDS; COEFFICIENTS;

D O I：

10.1063/1.4932049

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Extensive efforts have been made to develop metallic-glasses with large casting diameter. Such efforts were hindered by the poor understanding of glass formation mechanisms and the origin of the glass-forming ability (GFA) in metallic glass-forming systems. In this work, we have investigated relaxation dynamics of a model bulk glass-forming alloy system that shows the enhanced at first and then diminished GFA on increasing the percentage of micro-alloying. The micro-alloying did not have any significant impact on the thermodynamic properties. The GFA increasing on micro-alloying in this system cannot be explained by the present theoretical knowledge. Our results indicate that atomic caging is the primary factor that influences the GFA. The composition dependence of the atomic caging time or residence time is found to be well correlated with GFA of the system. (C) 2015 AIP Publishing LLC.

引用

页数：4

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