Measuring kinetic coefficients by molecular dynamics simulation of zone melting

Details Measuring kinetic coefficients by molecular dynamics simulation of zone melting Measuring kinetic coefficients by molecular dynamics simulation of zone melting

2002-01-21

arxiv.org/abs/cond-mat/0201371v1

Physics

Condensed Matter

Materials Science

8 pages, 9 figures (for fig. 8 : celest@l2mp.u-3mrs.fr). Accepted for publication in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.65.041605

Molecular dynamics simulations are performed to measure the kinetic coefficient at the solid-liquid interface in pure gold. Results are obtained for the (111), (100) and (110) orientations. Both Au(100) and Au(110) are in reasonable agreement with the law proposed for collision-limited growth. For Au(111), stacking fault domains form, as first reported by Burke, Broughton and Gilmer [J. Chem. Phys. {\bf 89}, 1030 (1988)]. The consequence on the kinetics of this interface is dramatic: the measured kinetic coefficient is three times smaller than that predicted by collision-limited growth. Finally, crystallization and melting are found to be always asymmetrical but here again the effect is much more pronounced for the (111) orientation.

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