Structure of liquid Al-Sn alloys

摘要

The short-range order of liquid Al-Sn alloys (0, 3, 8, 13, 20, 35, 50, 75, 100 at. % Sn) at 973 and 1273 K has been studied by X-ray diffraction and Reverse Monte Carlo simulation. The analysis of the experimental and simulation data points out the presence of atomic clusters with a local structure similar to liquid Sn even at low tin content (8 at. %). An impact of these clusters on the formation of short-range order of Al-Sn melts becomes dominant at 35 at. % Sn, resulting in the similarity between experimental structure factors and pair correlation functions of binary melts and liquid tin. On the other hand, the short-range order of liquid binary alloy with high Al content (97 at. %) is structurally homogeneous and based on the local atomic structure of liquid aluminium. The comparison between the short-range order of the liquid Al-Sn, Al-Ge, and Al-Si alloys has been discussed. (C) 2021 Elsevier B.V. All rights reserved.