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Technical Brief

Improvement in Boundary Lubrication Characteristics of SAE20W40 Oil Using Aluminum Oxide Nanoparticles

[+] Author and Article Information
Avinash A. Thakre

Department of Mechanical Engineering,
Visvesvaraya National Institute of Technology,
Nagpur 440010, India
e-mail: avinashathakre@gmail.com

Ananta Shinde

Department of Mechanical Engineering,
Visvesvaraya National Institute of Technology,
Nagpur 440010, India
e-mail: shindeananta16@gmail.com

Ganesh Mundhe

Department of Mechanical Engineering,
Visvesvaraya National Institute of Technology,
Nagpur 440010, India
e-mail: ganeshmundhe007@gmail.com

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received April 11, 2015; final manuscript received October 4, 2015; published online November 11, 2015. Assoc. Editor: Ning Ren.

J. Tribol 138(3), 034501 (Nov 11, 2015) (4 pages) Paper No: TRIB-15-1114; doi: 10.1115/1.4031853 History: Received April 11, 2015; Revised October 04, 2015

The present work includes the study of boundary lubrication properties of SAE20W40 lubricating oil added with aluminum oxide nanoparticles. Pin-on-disk tribometer is employed to study the effects of nanoparticles in different sizes (40–80 nm) and concentrations (0–1% by weight) on the friction coefficient. The experimental design consists of L18 orthogonal array involving six levels for nanoparticles concentration and three levels for nanoparticles size, sliding speed, and normal load. The presence of nanoparticles has significantly improved the lubrication properties of oil. Minimum friction coefficient is recorded at 1200 rpm rotational speed and 160 N normal load for 0.8% concentration of 60 nm sized nanoparticles. Scanning electron microscopy (SEM) and electron diffraction spectrometry (XRD) are employed to understand the friction reduction mechanism.

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Figures

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Fig. 1

SEM photograph of nanoparticles

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Fig. 2

Pin-on-disk tribometer

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Fig. 3

Friction coefficients for few experimental combinations

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Fig. 4

Main effect plots for the friction coefficient

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Fig. 5

SEM images of worn surfaces: (a) and (b) for 1200 rpm rotational speed and 160 N load for oil; (c) and (d) for 1000 rpm speed, 140 N load, and 0.2% concentration of 80 nm sized nanoparticles in oil; and (e) and (f) for 800 rpm speed, 140 N load, and 0.8% concentration of 80 nm sized nanoparticles in oil

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Fig. 6

Electron diffraction spectrometry (EDS) images of the wear tracks: (a) before sliding and (b) after sliding at 800 rpm speed, 160 N load, and 0.6% concentration of 80 nm sized nanoparticles in oil

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