Effect of Al-Zr clusters on the thermal stability of Cu-Zr-rich Cu-Zr-Al bulk metallic glasses |
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| Authors: | Ailong Zhang Ding Chen Zhenhua Chen Yongfu Long Yan Li Shenghui Wang |
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| Affiliation: | 1. College of Physics and Electronics, Hunan University of Arts and Science, Changde, China;2. College of Materials Science and Engineering, Hunan University, Changsha, China |
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| Abstract: | The Gibbs free energy of formation, ?Ga, of the amorphous phase of Cu–Zr-rich Cu–Zr–Al bulk metallic glasses (BMGs) has been calculated over a broad composition region to re-evaluate their thermal stability, based on the efficient cluster packing model. It is found that Al–Zr clusters have an important effect on the thermal stability of the Cu–Zr–Al BMGs with the same Cu/Zr content ratio. The crystallisation of the BMGs involves crystallisation of both Al–Zr and Cu–Zr clusters. The results could be useful for predicting the thermal stability and understanding the underlying mechanism of crystallisation of multicomponent metallic glasses. |
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| Keywords: | Amorphous alloys BMGs Cu–Zr–Al metallic glasses microstructure thermal stability thermodynamics clusters crystallisation |
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