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Abstract: Melting behaviors of aluminum 111 perfect-nonperfect surfaces,characterized by structure ordering parameter, have been investigated byclassical molecular dynamics simulation with embedded atom method potential. Al111 perfect surface has a superheating temperature above bulk Al meltingpoint Tm, in this work, by about 80 K. Al nonperfect 111 surface has somewhatdifferent local lattice structure from that on 111 perfect surface. Alnonperfect 111 surfaces tempt to premelt when temperature is less than Tm, inour simulation, by about 45 K. Aluminum atoms on the nonperfect surface zonesare the sources of surface melting, and have larger velocities than those onthe perfect surface zones.



Autor: F.L. Tang, X.G. Cheng, W.J. Lu, W.Y. Yu

Fuente: https://arxiv.org/



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