Molten and solidification properties of copper nanoparticles |
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| Authors: | Zhongqiang Zhang Yonggang Zheng Hongfei Ye Guanggui Cheng Jianning Ding |
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| Affiliation: | 1. Micro/Nano Science and Technology Center, Jiangsu University, Zhenjiang, China;2. State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian, China;3. Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou, China |
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| Abstract: | The melting and solidifying processes are carried out using molecular dynamics simulations. The influencing mechanism of the simulation size and the crystal configuration after solidification on the molten and the solidification properties is explored. The results demonstrate that the crystal structure of solidified copper nanoparticle is sensitive to the size of the copper nanocubes. Polycrystalline appears in the solidified copper nanoparticle for the relatively larger copper cubes; correspondingly, the grain boundaries give rise to the increase of the average atomic energy. Whereas for the relatively small copper cubes, the solidified copper nanoparticles mainly present monocrystalline structure. Moreover, the relationship between the internal pressure of the liquid copper droplets and the droplet diameter is studied to clarify the surface tension property at nanoscale. It is found that the internal pressure of the liquid copper droplets is logarithmically linearly dependent on the diameter of the copper droplets, implying that the surface tension of the liquid copper is not sensitive to the diameter of the liquid copper droplets. The present findings will be helpful to the preparation of the copper nanoparticle‐based thin ribbon. Copyright © 2016 John Wiley & Sons, Ltd. |
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| Keywords: | copper nanoparticle molten‐solidification surface tension copper droplet molecular dynamics |
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