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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 3    June 2002

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Crystallization kinetics of amorphous
Zr65Cu25Al10 alloy
WANG Huan-rong(王焕荣)1, SHI Zhi-qiang(石志强)1, WANG Yan(王  艳)1
TENG Xin-ying(滕新营)1, YE Yi-fu(叶以富)12,<

1. Key Laboratory of Liquid Structure and Heredity of Materials,
Ministry of Education, Shandong University, Ji′nan 250061, China; 
2. College of Resource and Environmental Engineering,
East China University of Science and Technology, Shanghai 200237, China

Abstract:Crystallization behavior of amorphous Zr65Cu25Al10 alloy under isothermal annealing condition was investigated by DSC and XRD. It is found that two exothermic peaks appear in the DSC curve of amorphous Zr65Cu25Al10 alloy, indicating that the crystallization proceeds through double-stage m ode. The crystallization process of amorphous Zr65Cu25Al10 alloy under isothermal annealing condition is mainly controlled by nucleation and one-dimensional growth with the crystallized volume fraction smaller than 70%. With the crystallized volume fraction ranging from 70% to 90%, crystallization process is mainly dominated by the growth of three-dimensional pre-existing quench-in nuclei. And when the crystallized volume fraction reaches above 90%, transient nucleation becomes the master of the crystallization process.

 

Key words: crystallization kinetics; amorphous Zr65Cu25Al10 alloy; DSC; Avramiexponent

ISSN 1672-7029
CN 43-1423/U

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