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Enhanced tribology properties of ZnO/Al2O3 composite nanoparticles as liquid lubricating additives

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Abstract

Monodispersed and hydrophobic ZnO/Al2O3 composite nanoparticles are prepared by a nonhydrolytic sol–gel method. ZnCl2 and AlCl3 are dissolved in acetone and used as precursors. Oleic acid is adopted as an oxygen donor. The tribology properties of the prepared ZnO/Al2O3 composite nanoparticles are studied by the four-ball friction and thrust ring friction test. It is demonstrated that the average friction coefficient and the wear scar diameter are reduced by 37.5 and 26.2%, respectively, in comparison with pure lubricating oil. Moreover, the ZnO/Al2O3 composite nanoparticles bear the merits of ZnO and Al2O3 when used as lubricant additives, exhibiting both excellent antifriction and antiwear behaviors simultaneously. The ZnO/Al2O3 composite nanoparticles improve the lubrication effect not only by turning the sliding friction into rolling friction, but also forming a hard Al2O3 protective film onto the thrust-ring surface containing ZnO/Al2O3 nanoparticles, which have much potentiality in industrial applications.

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Acknowledgments

The authors acknowledge the financial support from National Science Foundation of China (11174112) and the Program for New Century Excellent Talents in University of MOE, China. BC thanks the Oversea Taishan Scholar Professorship (TSHW20091007) tenured at University of Jinan.

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Authors and Affiliations

  1. Key Laboratory of Inorganic Functional Materials in Universities of Shandong, School of Material Science and Engineering, University of Jinan, Jinan, 250022, China

    Qiang Chen, Shaohua Zheng, Wei Li, Xiaoyun Song & Bingqiang Cao

  2. Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA, 16802-6812, USA

    Shikuan Yang

Authors
  1. Qiang Chen
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  2. Shaohua Zheng
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  3. Shikuan Yang
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  4. Wei Li
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  5. Xiaoyun Song
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  6. Bingqiang Cao
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Correspondence to Shaohua Zheng or Bingqiang Cao.

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Chen, Q., Zheng, S., Yang, S. et al. Enhanced tribology properties of ZnO/Al2O3 composite nanoparticles as liquid lubricating additives. J Sol-Gel Sci Technol 61, 501–508 (2012). https://doi.org/10.1007/s10971-011-2651-0

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  • DOI: https://doi.org/10.1007/s10971-011-2651-0

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