Molecular dynamics simulations on local structure and diffusion in liquid TixAl1−x alloys |
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| Authors: | JH Xia CS LiuZF Cheng DP Shi |
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| Institution: | a Department of Physics, Chongqing University of Arts and Sciences, Chongqing 402160, PR China
b Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei 230031, PR China |
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| Abstract: | The microscopic structure and dynamics of liquid TixAl1-x alloys together with pure liquid Ti and Al metals were investigated by means of molecular dynamics simulations. This work gives the structural properties, including pair-correlation function, bond-angle distribution function, HA and Voronoi indices, and their composition dependence. The dynamical properties have also been studied. The calculated pair-correlation function, bond-angle distribution function, and HA and Voronoi indices suggest that the stoichiometric composition Ti0.75Al0.25 exhibits a different local structure order compared with other concentrations, which help us understand the appearance of the minimum diffusion coefficient at this composition. These results indicate that the mobility of atoms strongly depends on their atomic local structure. |
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| Keywords: | Molecular dynamics simulation Liquid TixAl1&minus x alloys Local structure |
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