Non-isothermal crystallization behavior of U-based amorphous alloy

被引：35

作者：

Ke, H. B. ^{[1
]}

Xu, H. Y. ^{[1
]}

Huang, H. G. ^{[1
]}

Liu, T. W. ^{[1
]}

Zhang, P. ^{[1
]}

Wu, M. ^{[1
]}

Zhang, P. G. ^{[1
]}

Wang, Y. M. ^{[2
]}

机构：

[1] China Acad Engn Phys, Inst Mat, POB 9071, Jiangyou 621907, Sichuan, Peoples R China

[2] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Mat Modificat Laser Ion & Electron Beams, Minist Educ, Dalian 116024, Liaoning, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 691卷

基金：

中国国家自然科学基金;

关键词：

Amorphous alloy; Uranium alloy; Crystallization; Percolation; GLASS-FORMING LIQUIDS; BULK METALLIC-GLASS; THERMAL-STABILITY; KINETICS; PERCOLATION; TEMPERATURE; FORMERS; DSC;

D O I：

10.1016/j.jallcom.2016.08.252

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The non-isothermal crystallization behavior of uranium-based amorphous alloy U64Co28.5Al7.5 was investigated by using differential scanning calorimetry. Its kinetic fragility parameter, overall crystallization activation energy and Kauzmann temperature were determined to be 28, 234 kJ/mol and 580 K, respectively. The evolution of the crystallization activation energy with the volume fraction crystallized, which was established by both the Kissinger and Ozawa methods independently, suggests a typical three-staged process for the crystallization. As reflected by the change of the local Avrami exponent with the fraction crystallized, nucleation dominates the whole process that can be illustrated phenomeno-logically with the percolation model. This work is helpful for understanding the formation and thermal stability of U-based amorphous alloys, and also for the development of new materials of this kind. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：436 / 441

页数：6

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