标题：Atomic structure and viscosity behavior in Cu37Sb63and Cu20Sb80melts
作者：Guo, Fengxiang ;Tian, Yu ;Zheng, Hongliang ;Li, Tongtong ;Liu, Xiaobei ;Xu, Xiaomei ;Qin, Jingyu ;Qin, Xubo ;Tian, Xuelei
作者机构：[Guo, Fengxiang ;Zheng, Hongliang ;Li, Tongtong ;Liu, Xiaobei ;Xu, Xiaomei ;Qin, Jingyu ;Qin, Xubo ;Tian, Xuelei ] Key Laboratory for Liquid-Solid Str 更多
摘要：Atomic structure of Cu37Sb63and Cu20Sb80melts has been studied by high temperature X-ray diffraction and viscosity measurement. Split main peaks indicate Cu-Sb heterogeneous and Sb-homogeneous clusters dominate in these two melts, respectively. This results in the smaller first-neighbor radius and higher viscosity in Cu37Sb63melts. In pair distribution functions of Cu20Sb80melts, the hump around 0.44 nm becomes obvious below 973 K, which reveals the reinforcement of Sb clusters with Peierls distortion. This is consistent with the increase in viscous-flow activation energy in Cu20Sb80melts around 973 K. Structure parameters change is also discussed in terms of clusters evolution during cooling. © 2013 Elsevier B.V. All rights reserved.