Molecular dynamics simulation of the tribological performance of amorphous/amorphous nano-laminates  

作　　者：Dongpeng Hua Wan Wang Dawei Luo Qing Zhou Shuo Li Junqin Shi Maosen Fu Haifeng Wang 

机构地区：[1]State Key Laboratory of Solidification Processing,Center of Advanced Lubrication and Seal Materials,Northwestern Polytechnical University,Xi’an,Shaanxi 710072,PR China

出　　处：《Journal of Materials Science & Technology》2022年第10期226-236,共11页材料科学技术（英文版）

基　　金：the Natural Science Foundation of China(No.51801161);the support of the 2020 postgraduate creative innovation seed fund of Northwestern Polytechnical University(CX2020073);the Fundamental Research Funds for the Central Universities(3102019JC001)。

摘　　要：Because the amorphous/amorphous nano-laminates could enhance signifcantly 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 Cu_(80)Zr_(20)/Cu_(20)Zr_(80)(A/B-type)and the Cu_(20)Zr_(80)/Cu_(80)Zr_(20)(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 signifcant 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.

关 键 词：Amorphous/amorphous nano-laminates NANO-SCRATCH Molecular dynamics simulation TRIBOLOGY 

分 类 号：TB383.1[一般工业技术—材料科学与工程]