Tribological Mechanism of Friction and Wear Reduction Using Oil-Based ZnO Nanofluid Applied on Brass

  • Chuanlin Tao Automotive Tribology Center, School of Engineering and Computer, Oakland University, Rochester, MI, USA School of Mechanical Engineering Qingdao Technology University, Huangdao Campus, Qingdao
  • Bingxu Wang Automotive Tribology Center, School of Engineering and Computer, Oakland University, Rochester, MI, USA School of Mechanical Engineering Qingdao Technology University, Huangdao Campus, Qingdao
  • Gary C. Barber Automotive Tribology Center, School of Engineering and Computer, Oakland University, Rochester, MI, USA School of Mechanical Engineering Qingdao Technology University, Huangdao Campus, Qingdao
  • J. David Schall Automotive Tribology Center, School of Engineering and Computer, Oakland University, Rochester, MI, USA School of Mechanical Engineering Qingdao Technology University, Huangdao Campus, Qingdao
  • Qian Zou Automotive Tribology Center, School of Engineering and Computer, Oakland University, Rochester, MI, USA School of Mechanical Engineering Qingdao Technology University, Huangdao Campus, Qingdao
  • Jing Wang Automotive Tribology Center, School of Engineering and Computer, Oakland University, Rochester, MI, USA School of Mechanical Engineering Qingdao Technology University, Huangdao Campus, Qingdao
DOI: https://doi.org/10.19044/esj.2019.v15n3p223

Abstract

In this research, friction and wear characteristics of oil-based ZnO nanofluid applied on brass disk specimens using a flat-on-flat reciprocating sliding test were studied. Oleic acid was used as surfactant to improve the stability and dispersibility of the ZnO nanofluid. Metallurgical optical microscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy were utilized to understand the mechanisms. A 2wt% ZnO nanofluid resulted in 61.1% reduction in coefficient of friction. Good wear resistance was achieved using low concentrations of 0.5wt% and 1wt% ZnO nanofluid. A tribo-film mainly composed of carbon was found inside the wear track, which enhanced the wear resistance and lowered the interface shear strength. This tribo-film was produced by oleic acid which was chemically adsorbed to the brass materials.

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Published
2019-01-31
How to Cite
Tao, C., Wang, B., Barber, G. C., Schall, J. D., Zou, Q., & Wang, J. (2019). Tribological Mechanism of Friction and Wear Reduction Using Oil-Based ZnO Nanofluid Applied on Brass. European Scientific Journal, ESJ, 15(3), 223. https://doi.org/10.19044/esj.2019.v15n3p223
Issue
Vol 15 No 3 (2019): ESJ JANUARY EDITION
Section
Articles