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Tribological behavior and tribofilm composition in lubricated systems containing surface-capped molybdenum sulfide nanoparticles

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The tribological behavior of surface-capped MoS3 nanoparticles (nano-MoS3) in hydrocarbon oils was studied both alone and in combination with ZDDP. It was found that the nano-MoS3 additive alone demonstrates pro-wear properties and decreases the friction coefficient only at high temperatures. The combination with ZDDP demonstrates synergism in antiwear and antifriction activity even at low ZDDP content. X-ray Absorption Near Edge Structure (XANES) spectroscopy at the sulfur, molybdenum and phosphorus edges was used to identify the chemical species in tribochemical films. It was established that the nano-MoS3-formed tribofilms are composed of oxidized sulfur and molybdenum species while tribofilms formed by combination with ZDDP are composed of phosphate layers incorporating MoS2-type fragments providing friction reduction.

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Acknowledgments

This study was financially supported by grants from the National Research Council of Canada (NRC); and the Natural Science, Engineering Research Council (NSERC) of Canada. The authors are grateful to Dr. A. Jűrgensen from CSRF, and to the staff of the Synchrotron Radiation Center (SRC), University of Wisconsin, Madison, for their technical support. One of the authors (V.N.B.) would like to thank Centre of Chemical Physics (UWO, Canada) for the award of a Senior Visiting Fellowship. We are also grateful to the National Science Foundation (NSF) for supporting the SRC under Award No. DMR-0084402.

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Authors and Affiliations

  1. A.V. Topchiev Institute of Petrochemical Synthesis RAS, 29 Leninsky Prosp., Moscow, 119991, Russia

    V.N. Bakunin, G.N. Kuzmina & O.P. Parenago

  2. Department of Chemistry, University of Western Ontario, London, Ontario, N6A 5B7, Canada

    M. Kasrai & G.M. Bancroft

Authors
  1. V.N. Bakunin
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  2. G.N. Kuzmina
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  3. M. Kasrai
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  4. O.P. Parenago
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  5. G.M. Bancroft
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Correspondence to V.N. Bakunin.

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Bakunin, V., Kuzmina, G., Kasrai, M. et al. Tribological behavior and tribofilm composition in lubricated systems containing surface-capped molybdenum sulfide nanoparticles. Tribol Lett 22, 289–296 (2006). https://doi.org/10.1007/s11249-006-9095-7

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  • DOI: https://doi.org/10.1007/s11249-006-9095-7

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