Abstract
An environment-dependent tight-binding potential model for copper within the framework of quantum theory is developed. Our benchmark calculations indicate that this model has good performance in describing the elastic property, the stability and the vibrational property of bulk copper, as well as in handling the clusters, the surfaces and the defective Cu systems. By combining this model with molecular dynamics, we study how the evolution of structural defects arising from the irradiation of the energetic particles influences the mechanical and the thermal properties of the copper-heat-sinks in fusion reactors. Based on our simulations, the heat blockade in the irradiated Cu-heat-sinks is predicted. This finding is valuable for the development of wall materials in fusion reactors.
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