Crystallization kinetics of TiZrHfCuNiBe high entropy bulk metallic glass

被引：53
|
作者：
Gong, P. [1 ]
Yao, K. F. [1 ]
Ding, H. Y. [1 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
来源：
MATERIALS LETTERS | 2015年 / 156卷
基金：
中国国家自然科学基金;
关键词：
Amorphous materials; Metals and alloys; High entropy alloys; Bulk metallic glasses; Thermal analysis; Crystallization kinetics; ALLOYS; CO;
D O I：
10.1016/j.matlet.2015.05.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The isochronal and isothermal DSC annealing techniques have been employed to investigate the crystallization behavior of a newly developed Ti16.7Zr16.7Hf16.7Cu16.7Ni16.7Be16.7 high entropy bulk metallic glass. In non-isothermal condition, the activation energies for glass transition, onset and the first crystallization process were determined by Kissinger equation, to be 331.8 +/- 8.0, 215.3 +/- 4.5 and 245.5 +/- 6.3 kJ/mol, respectively. The isothermal kinetics was modeled by the Johnson-Mehl-Avrami (JMA) equation. During the crystallization process, the isothermal activation energy calculated by the Arrhenius equation changes little with an average value of 259.9 kJ/mol. The Avrami exponent is in the range from 1.81 to 2.04, indicating that the crystallization process is mainly dominated by growth of particles with a decreasing nucleation rate. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：146 / 149
页数：4
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