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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 6    December 2009

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Crystallization kinetics of bulk Cu58.1Zr35.9Al6 alloy
WANG Shao-xu(王韶旭)1, 2, ZHU Chun-lei(朱春雷)1, QUAN Shi-guang(全世光)1, LI Yan- hui(李艳辉)1,
WANG Ying-min(王英敏)1, WANG Qing(王 清)<

1. Key Laboratory of Materials Modification by Laser, Ion and Electron Beams,
Dalian University of Technology, Dalian 116024, China;
2. College of Environmental Science and Engineering, Dalian Jiaotong University, Dalian 116028, China

Abstract:The crystallization kinetics of the bulk amorphous Cu58.1Zr35.9Al6 alloy was examined by differential scanning calorimetry under continuous heating and isothermal annealing. During continuous heating, the activation energy of crystallization was determined to be 383 kJ/mol by Kissinger method. However, on the isothermal annealing, the activation energy was determined to be 459.2 kJ/mol by the Arrhenius method, which was much larger than that obtained from the Kissinger method. The different temperatures at which crystallization occurs are responsible for the discrepancy in the activation energy. The average Avrami exponent of about 3.5 implies that the crystallization process of the bulk amorphous Cu58.1Zr35.9Al6 alloy is diffusion-controlled with a nucleation rate decreasing with time.

 

Key words: Cu58.1Zr35.9Al6 alloy; different scanning calorimetry (DSC); crystallization kinetics

ISSN 1672-7029
CN 43-1423/U

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