Nano friction behaviour between magnetic materials and copper considering the inter-diffusion effect  

作　　者：Zilin LI Lisha DOU Shiyu YANG Huajiang OUYANG Qichen ZHU Xiaoyang CHEN Xin JIA Shuaiwei DOU Xiaolong CUI Yudong ZHANG Jingjiang QIU Guochen QI Bangbang NIE Pan LIU Ronghan WEI 

机构地区：[1]School of Mechanics and Safety Engineering,Zhengzhou University,Zhengzhou 450001,China [2]Engineering Technology Research Center of Henan Province for MEMS Manufacturing and Application,Zhengzhou University,Zhengzhou 450001,China [3]Institute of Intelligent Sensing,Zhengzhou University,Zhengzhou 450001,China [4]School of Engineering,University of Liverpool,Liverpool L693GH,UK [5]School of Cyber Science and Engineering&Hanwei Institute of Internet of Things,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Friction》2024年第7期1532-1547,共16页摩擦（英文版）

基　　金：the National Natural Science Foundation of China(No.52171193);China Postdoctoral Science Foundation(No.2019M652564);Henan Postdoctoral Science Foundation(No.19030013)。

摘　　要：Copper,permalloy,cobalt,and silicon are the materials that have been widely utilised in magnetic devices.When the size of interest is down to the nanoscale,the inter-diffusion between certain materials becomes influential.This paper studies the nanoscale friction characteristics between frictional pairs with and without inter-diffusion properties through the atomic force microscope.The distinct evolution features of nanoscale friction force when inter-diffusion is involved are discovered experimentally,which is also confirmed through theoretical analysis.Firstly,through the thin film deposition method,four pairs of contact materials(Cu–Ni_(81)Fe_(19),Si–Ni_(81)Fe_(19),Cu–Co,Cu–Si)are designed for friction tests,in which diffusion occurs at the interface of Cu–Ni_(81)Fe_(19)pair.Then,the effects of sliding velocity and loading force on the nano friction of each pair are measured.It is found that regardless of the diffusion phenomenon:(1)the adhesion force values exhibit a notable correlation to the values of the friction force;(2)the friction force in all four material pairs consistently increases with the growth of the normal loading force,although the growth rate may differ.In terms of the sliding velocity effect,the friction forces of immiscible materials(Si–Ni_(81)Fe_(19),Cu–Co,and Cu–Si)are found to increase with the increasing sliding velocity.However,the friction force of Cu–Ni_(81)Fe_(19),decreases with the increasing sliding velocity.Furthermore,a compositive friction model considering both the velocity and the normal force effect was proposed,which shows good agreement with the experimental results and explains the nano friction behaviour of both miscible and immiscible metals.

关 键 词：atomic force microscope friction force normal load sliding velocity 

分 类 号：TH117[机械工程—机械设计及理论]