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Molecular dynamics simulations on local structure and diffusion in liquid TixAl1−x alloys

✍ Scribed by J.H. Xia; C.S. Liu; Z.F. Cheng; D.P. Shi

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
263 KB
Volume
406
Category
Article
ISSN
0921-4526

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✦ Synopsis

The microscopic structure and dynamics of liquid Ti x Al 1-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 Ti 0.75 Al 0.25 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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