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Molecular dynamics simulation of the wetting behavior of Pb droplet on Ni substrate

Qiu Feng Wang Meng Zhou Hua-Guang Zheng Xuan Lin Xin Huang Wei-Dong

Molecular dynamics simulation of the wetting behavior of Pb droplet on Ni substrate

Qiu Feng, Wang Meng, Zhou Hua-Guang, Zheng Xuan, Lin Xin, Huang Wei-Dong
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  • Abstract views:  1523
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  • Received Date:  26 December 2012
  • Accepted Date:  28 February 2013
  • Published Online:  05 June 2013

Molecular dynamics simulation of the wetting behavior of Pb droplet on Ni substrate

  • 1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China
Fund Project:  Project supported by the National Basic Research Program of China (Grant No. 2011CB610402) and the National Natural Science Foundation of China (Grant Nos. 51271213, 50901061).

Abstract: Molecular dynamics simulation is performed to investigate the wetting behaviors of Pb droplet on Ni(100), Ni(110) and Ni(111) substrates. It has been shown that the wetting behavior of precursor film is isotropic for Pb droplet on Ni(100) and Ni(111) substrates, but anisotropic for Pb droplet on Ni(110) substrate. The demonstrated anisotropy is attributed to the differences in diffusion mechanism and rate along different crystal orientations for Pb atoms with corresponding anisotropic structure of the crystal lattice on Ni(110) substrate. The spreading dynamics of precursor film on different lattice surfaces are also investigated, which shows that there is no surface alloy formed for Pb droplet on Ni(111) surface and the spreading dynamics can be described by R2 t, but surface alloy forms for Pb droplet on Ni(100) and Ni(110) surface and the spreading dynamics satisfies R4 t, at the same time the spreading rate of droplet on Ni(100) is higher than that of Ni(110) substrate.

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