Abstract

Temperature-dependent atomistic structural evolution in liquid Sn85Zn15 eutectic alloy has been investigated by using in situ high energy X-ray diffraction and ab initio molecular dynamics simulations. We reveal a structural crossover at around 900 K in liquid Sn85Zn15 eutectic alloy, below and above which the liquids exhibit different changes in first peak position shifts on S(q) and G(r) curves, the nearest coordination number and activation energies for self-diffusion. This structural crossover is likely ascribed to the spatial connectivity variation of local clusters. Our finding will trigger more studies on the liquid-to-liquid structural transition in metallic liquids.

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