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Research Papers: Friction and Wear

Effects of Vanadium Oxide Nanoparticles on Friction and Wear Reduction

[+] Author and Article Information
Wei Dai

Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843
e-mail: daiwei7@tamu.edu

Kyungjun Lee

Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843
e-mail: lee23834@tamu.edu

Alexander M. Sinyukov

Department of Physics and Astronomy,
Texas A&M University,
College Station, TX 77843
e-mail: alexander.sinyukov@gmail.com

Hong Liang

Department of Mechanical Engineering,
Texas A&M University,
College Station, TX 77843
e-mail: hliang@tamu.edu

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received December 24, 2016; final manuscript received March 21, 2017; published online July 10, 2017. Assoc. Editor: Min Zou.

J. Tribol 139(6), 061607 (Jul 10, 2017) (7 pages) Paper No: TRIB-16-1400; doi: 10.1115/1.4036449 History: Received December 24, 2016; Revised March 21, 2017

In this research, rheological and tribological performance of additive V2O5 nanoparticles in a light mineral oil has been investigated. For rheological performance, the addition of 0.2 wt. % V2O5 could reduce the viscosity of the base oil for 6%. Considering the overall friction reduction in boundary, mixed, and hydrodynamic lubrication regimes, that with 0.1 wt. % V2O5 exhibited the best effect. Friction coefficient of base oil could be reduced by 33%. In terms of wear, the addition of 0.2 wt. % V2O5 showed the lowest wear rate, which is 44% reduction compared to base oil. Through Raman spectrum and energy dispersive spectroscopy (EDS) analysis, it was found that V2O5 involved tribochemical reaction during rubbing. Vanadium intermetallic alloy (V–Fe–Cr) was found to enhance the antiwear performance. This research revealed that V2O5 nanoparticles could be an effective additive to improve tribological performance.

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Figures

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Fig. 1

Transmission electron microscopy images of sheet-like V2O5

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Fig. 2

Raman spectrum of sheet-like V2O5

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Fig. 3

Viscosity of light mineral oil with V2O5 under different concentrations

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Fig. 4

Stribeck curve of light mineral oil samples with different concentration V2O5

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Fig. 5

Surface morphology and profile of wear tracks from different (a) light mineral oil, (b) light mineral oil with 0.05 wt. % V2O5, (c) light mineral oil with 0.1 wt. % V2O5, and (d) light mineral oil with 0.2 wt. % V2O5

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Fig. 6

Volume of wear tracks from light mineral oil with different V2O5 concentrations

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Fig. 7

Raman spectrum of wear tracks from different samples

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Fig. 8

Deconvolution results of Raman spectrum from different wear tracks: (a) base oil, (b) base oil + 0.05 wt. % V2O5, (c) base oil + 0.1 wt. % V2O5, and (d) base oil + 0.2 wt. % V2O5

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Fig. 10

EDS spectrum of wear track from Base oil + 0.2 wt. % V2O5

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Fig. 9

EDS scan area of wear track from Base oil + 0.2 wt. % V2O5

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Fig. 11

Illustration of the lubrication mechanism of V2O5

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