Non-isothermal crystallization kinetics of the Zr50Cu34Al8Ag8 amorphous alloy

•Non-isothermal crystallization kinetics of the alloy was investigated.•The heating rate had a greater effect on the crystallization process.•The crystallization mechanism of the alloy was determined. The crystallization kinetics of Zr50Cu34Al8Ag8 bulk metallic glass, under non-isothermal condition,...

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Published inMaterials letters Vol. 307; p. 130996
Main Authors Zhang, Shan, Wei, Chao, Lv, Jingwang, Zhang, Haoran, Shi, Zhilin, Zhang, Xinyu, Ma, Mingzhen
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.01.2022
Elsevier BV
Subjects
Amorphous alloys
Amorphous materials
Avrami equation
Crystallization
Crystallization kinetics
Crystallization mechanism
Diffusion rate
Kinetics
Materials science
Metallic glasses
Nucleation
Thermal properties
Thermal properties
Crystallization mechanism
Amorphous materials
Crystallization kinetics
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Summary:•Non-isothermal crystallization kinetics of the alloy was investigated.•The heating rate had a greater effect on the crystallization process.•The crystallization mechanism of the alloy was determined. The crystallization kinetics of Zr50Cu34Al8Ag8 bulk metallic glass, under non-isothermal condition, is investigated using differential scanning calorimetry. The activation energies for crystallization of the alloy are calculated using the Kissinger and Ozawa equations. The crystallization mechanism of amorphous alloy under continuous heating is explored via the improved Johnson-Mehl-Avrami equation. The local avrami index is mainly in the range of 2 to 2.5, which indicates that the crystallization is mainly governed by diffusion-controlled three-dimensional growth with a decreasing nucleation rate.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.130996