Molecular Dynamics Simulation of Au Nano--Scale Particle Deposited on Au Surface During Cold Spraying
GAO Hong; ZHAO Liangju; ZENG Danling; GAO Lijuan
College of Power Engineering; Chongqing University; Chongqing 400044
Cite this article:
GAO Hong; ZHAO Liangju; ZENG Danling; GAO Lijuan. Molecular Dynamics Simulation of Au Nano--Scale Particle Deposited on Au Surface During Cold Spraying. Acta Metall Sin, 2006, 42(11): 1158-1164 .
Abstract Cold spray is a rapidly emerging coating technology, in which spray particles in a solid state are deposited via plastic impact on a substrate to form a coat. In cold spray, spray particles are accelerated to a very high velocity by supersonic gas and the temperature of spray particles is much lower than the melting point. Molecular dynamics simulation was applied to the investigation of the deposition process of Au152, Au276, and Au420 clusters on Au surface. Interaction potential with glue model was used in the simulation. The impact, deposition process and the final appearances of cluster and substrate were observed directly by taking ‘snapshot’. It was found that the melt phenomenon occurred in the local area during the impact and deposition by studying the temperature of substrate. In addition, the influence factors on deposition, incident velocity of cluster and the size of cluster, were discussed in this paper simply.
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