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Research Papers: Micro-Nano Tribology

Experimental Study on Tribological Property of MoS2 Nanoparticle in Castor Oil

[+] Author and Article Information
Rui Yu

Department of Energy and Power Engineering,
School of Mechanical Engineering,
Beijing Institute of Technology,
Beijing 100081, China
e-mail: yurui7617@163.com

Jinxiang Liu

Department of Energy and Power Engineering,
School of Mechanical Engineering,
Beijing Institute of Technology,
Beijing 100081, China
e-mail: liujx@bit.edu.cn

Yang Zhou

Navigation and Control Technology Institute of NORINCO Group,
Beijing 100089, China
e-mail: xtszhouy@163.com

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received March 25, 2019; final manuscript received July 3, 2019; published online August 1, 2019. Assoc. Editor: Min Zou.

J. Tribol 141(10), (Aug 01, 2019) (5 pages) Paper No: TRIB-19-1122; doi: 10.1115/1.4044294 History: Received March 25, 2019; Accepted July 05, 2019

In this paper, the antiwear and antifriction performance of MoS2 nanoparticle in castor oil was studied. The ball-on-disc tests were performed for different concentrations of MoS2 nanoparticle. Coefficient of friction, wear loss, and worn surface morphology were investigated. The results show that MoS2 nanoparticle could reduce the possibility of asperities direct contact, resulting in the reduction of the coefficient of friction and adhesive wear. However, MoS2 nanoparticle in excessive concentration could agglomerate into large particles, playing the role of an abrasive particle, which reduces the beneficial effects of MoS2 nanoparticle.

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Figures

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Fig. 1

SEM image of MoS2 nanoparticle

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Fig. 2

Particle size distribution

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Fig. 3

Effect of MoS2 concentration on the coefficient of friction with time during running-in stage

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Fig. 4

Effect of MoS2 concentration on the coefficient of friction with time during the steady wear stage

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Fig. 5

The effect of MoS2 on the average coefficient of friction

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Fig. 6

The SEM image of the worn surface: (a) the CO condition, (b) the 0.05 wt% MoS2 condition, (c) the 0.1 wt% MoS2 condition, (d) the 0.15 wt% MoS2 condition, and (e) the 0.2 wt% MoS2 condition

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Fig. 7

The effect of MoS2 concentration on wear loss

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