Crystallization kinetics of bulk Cu58.1Zr35.9Al6 alloy

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. Howev...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2009-12, Vol.19 (6), p.1618-1622
Main Author: 于韶旭 朱春雷 全世光 李艳辉 王英敏 王清 董闯
Format: Article
Language:English
Subjects:
大块非晶合金
活化能
等温退火
结晶动力学
结晶温度
连续扫描
速率控制
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Summary: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.
ISSN:1003-6326
DOI:10.1016/S1003-6326(09)60078-9