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Tribological Properties of Polytetrafluoroethylene, Nano-Titanium Dioxide, and Nano-Silicon Dioxide as Additives in Mixed Oil-Based Titanium Complex Grease

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Abstract

Eight titanium complex greases (i.e., benzoic acid/stearic acid and sebacic acid/stearic acid titanium complex greases, and greases containing PTFE, or nano-titanium dioxide, or nano-silicon dioxide) were synthesized using 3-L reaction vessel. Their physical characteristics were characterized and their tribological properties were evaluated by using a four-ball tester. Chemical compositions of the boundary films generated on worn surfaces were analyzed with the use of scanning electron microscope and X-ray photoelectron spectrometer. Results show titanium complex greases containing PTFE, or nano-titanium dioxide, or nano-silicon dioxide exhibited excellent tribological performance. The mechanism for the friction-reduction and antiwear effect of all titanium complex greases was also proposed and discussed from a tribochemistry point of view.

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Acknowledgment

The authors thank Prof. Jianjun Qu (School of Mechatronics Engineering, Harbin Institute of Technology) for his support in providing the four-ball tester.

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  1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin, 150001, People’s Republic of China

    Jiguo Chen

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  1. Jiguo Chen
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Correspondence to Jiguo Chen.

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Chen, J. Tribological Properties of Polytetrafluoroethylene, Nano-Titanium Dioxide, and Nano-Silicon Dioxide as Additives in Mixed Oil-Based Titanium Complex Grease. Tribol Lett 38, 217–224 (2010). https://doi.org/10.1007/s11249-010-9593-5

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  • DOI: https://doi.org/10.1007/s11249-010-9593-5

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