Effect of lubricating phase size on tribological behavior of Ag-WS2 composites

被引：0

作者：

Li Y. ^{[1
]}

Sun Y. ^{[1
]}

Kang X. ^{[1
]}

Zhang L. ^{[1
]}

Zhou K. ^{[1
]}

机构：

[1] State Key Laboratory of Powder Metallurgy, Central South University, Changsha

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Ag-WS[!sub]2[!/sub] composites; Friction and wear; Lubricating film; Lubricating phase size;

D O I：

10.11817/j.issn.1672-7207.2020.11.007

中图分类号：

学科分类号：

摘要：

The Ag-WS2 solid lubricating composites containing WS2 granularity of 80 nm, 600 nm and 6 µm were prepared by spark plasma sintering, and the influence of WS2 granularity on the tribological behavior of the composites was investigated. The wear surface micro-morphology of Ag-WS2 composites was analyzed.The results show that as the WS2 granularity decreases from 6 µm to 80 nm, the friction coefficient of the Ag-WS2 composites decreases from 0.21 to 0.09, and the wear rate of the composites decreases from 4.68×10-5 mm3/(N•m) to 3.35×10-5 m3/(N•m). The wear mechanism of Ag-WS2 composites changes from the combined effect of abrasive wear and fatigue wear to slight abrasive wear. WS2 granularity significantly affects the formation of interfacial lubricating film. The smaller granularity of WS2 makes it easier to fill the grooves or micro-convex gaps on the wear surface, which can form a continuous and smooth lubricating film, and thereby significantly reduce the friction coefficient and wear rate of the Ag-WS2 composites. © 2020, Central South University Press. All right reserved.

引用

页码：3064 / 3071

页数：7

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