材料科学
无定形固体
复合材料
摩擦学
分子动力学
动力学(音乐)
纳米-
纳米技术
结晶学
物理
声学
计算化学
化学
作者
Dongpeng Hua,Wan Wang,Dawei Luo,Qing Zhou,Shuo Li,Junqin Shi,Maosen Fu,Haifeng Wang
标识
DOI:10.1016/j.jmst.2021.07.027
摘要
Because the amorphous/amorphous nano-laminates could enhance significantly the mechanical properties of the amorphous materials, they have been widely studied as a new group of structural materials. In this study, the nano-scratch performance of the Cu80Zr20/Cu20Zr80 (A/B-type) and the Cu20Zr80/Cu80Zr20 (B/A-type) amorphous/amorphous nano-laminates was evaluated by molecular dynamics simulation. Their dependences on the type of indenter, layer thickness, stacking mode and scratch depth were systematically analyzed. There is a significant size effect for the tribological properties of amorphous/amorphous nanolaminates that the friction force of the A/B-type increases with the increase of layer thickness, but the friction force of the B/A-type decreases as the layer thickness increase. The interface has an obvious obstruction effect on the shear deformation and reduces the plastic affected region below the scratched groove. Particularly, the contact environment of the indenter bottom has an important influence on the normal force, so it's not that the deeper the depth, the greater the normal force. Hence it should not be ignored when evaluating the tribological properties of the amorphous/amorphous nano-laminates. This work can deepen the understanding of hetero-interface on the deformation mechanism during nano-scratch, and help to design amorphous nano-laminates with tailored tribological performance for practical applications.
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