Coupling between chemical and dynamic heterogeneities in a multicomponent bulk metallic glass
T Fujita and PF Guan and HW Sheng and A Inoue and T Sakurai and MW Chen, PHYSICAL REVIEW B, 81, 140204 (2010).
We performed molecular-dynamics simulation and predicted a strong coupling between chemical short-range order and dynamic heterogeneity in a multicomponent Cu45Zr45Ag10 alloy that possesses excellent glass- forming ability. The intrinsic correlation between the chemical and dynamic heterogeneities leads to significant spatial partitioning and dynamic isolation between Cu-rich slow-dynamics regions and Ag-rich fast-dynamics regions. This characteristic may play an important role in the improved glass-forming ability with Ag addition by retarding crystallization kinetics.
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