Effect of electropulsing treatment on the crystallization kinetics of Zr₅₅Ni₅Al₁₀Cu₃₀ bulk metallic glass

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• 作者：Haoyan Sun ; Jingsong Wang ; ^{wangjingsong@ustb.edu.cn} ; Lijun Cao ; Qingguo Xue
• 关键词：Amorphous ; Electropulsing ; Non-vacuum preparation ; Crystallization ; Non-isothermal kinetics
• 刊名：Thermochimica Acta
• 出版年：2012
• 期刊代码：110_00406031
• 类别：ch
• 出版时间：10 June, 2012
• 卷：537
• 期：Complete
• 页码：80-85
• 文件大小：827 K

摘要

Zr₅₅Ni₅Al₁₀Cu₃₀ bulk metallic glass with a diameter of 3 mm was prepared by copper-mold suction casting combined with covering flux technology under non-vacuum conditions. The non-isothermal crystallization kinetics of Zr₅₅Ni₅Al₁₀Cu₃₀ bulk metallic glass prepared with and without electropulsing treatment on the molten alloy have been studied using the modified JMA equation. Results show that, after electropulsing treatment, the glass transition temperature increases, while the crystallization temperatures and supercooled liquid range both decrease. The activation energies of glass transition and crystallization become reduced and the Avrami exponents of crystallization become raised, indicating that the glass transition and crystallization of Zr₅₅Ni₅Al₁₀Cu₃₀ bulk metallic glass are promoted by electropulsing treatment.