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Surface Engineering Volume 35, 2019 - Issue 1
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Research Articles

Wide temperature lubrication of LST/PEO/Ag/MoS2 multilayer coating

Yongkun QinMaterials & Structural Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, People’s Republic of China;School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, People’s Republic of China;Research Center on New Materials in Hydraulic Structure, Ministry of Water Resources, Nanjing, People’s Republic of ChinaView further author information
,
Yan LiMaterials & Structural Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, People’s Republic of China;Research Center on New Materials in Hydraulic Structure, Ministry of Water Resources, Nanjing, People’s Republic of ChinaView further author information
,
Dangsheng XiongSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, People’s Republic of ChinaCorrespondence[email protected]
View further author information
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Jianliang LiSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, People’s Republic of ChinaView further author information
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Zhuwen LiMaterials & Structural Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, People’s Republic of ChinaView further author information
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Xichang ZhuResearch Center on New Materials in Hydraulic Structure, Ministry of Water Resources, Nanjing, People’s Republic of ChinaView further author information
,
Yan GeResearch Center on New Materials in Hydraulic Structure, Ministry of Water Resources, Nanjing, People’s Republic of ChinaView further author information
&
Rongchu ZhangNanjing Chang Rong acoustics Co., Ltd., Nanjing, People’s Republic of ChinaView further author information
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Pages 71-78 | Received 25 Oct 2017, Accepted 11 Apr 2018, Published online: 06 May 2018
 
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ABSTRACT

The Ag film and MoS2 film were successively deposited onto the LST/PEO duplex-treated titanium alloy substrate. The friction tests were conducted at 25°C, 350°C and 600°C, respectively. The worn morphologies were analysed by optical microscopy and Raman spectrum. The results showed that the LST/PEO/Ag/MoS2 coating exhibited more excellent friction behaviour in comparison to the LST/PEO coating at 25–600°C. The combined lubrication of Ag diffused from surface micro-pores and Ag2MoO4 formed on the surface is responsible for the decrease of friction coefficient at 600°C. It also revealed that the friction heat can promote the formation of Ag2MoO4 in comparison to the high test temperature.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work is financially supported by the National Natural Science Foundation of China [Nos. 51101087, 51575278], Natural Science Foundation of Jiangsu Province [No.BK20151487], the Special Fund for Transformation of Scientific and Technological Achievements of Jiangsu Province [No. BA2015054], and the Scientific Research Foundation for Central Research Institutes [No. Y417003].

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