Mechano-Chemical Surface Modification with Cu2S: Inducing Superior Lubricity

Abstract

Advances toward low friction surfaces are in growing demand from many economic sectors for energy efficiency and environmental safety. However, the traditional approach of multi-grade oil formulation is limited by its inability to induce pollution-free generation of uniform oil-retaining films needed to improve surface lubricity. Here, a direct route to the formation of a surface layer of superior lubricity is presented as an alternative to the use of oil additives for friction reduction. The deformation-induced generation of a surface film consisting of low-shear-strength oil-retaining compounds is obtained via supplying chemically beneficial elements during a widely used surface finishing mechanical treatment. An ultra-low friction coefficient of about 0.01 is obtained with base oil lubrication after tailoring the surface chemistry by shot peening using a mixture of Cu2S and Al2O3; this result opens new horizons for surface engineering.

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References

  1. 1.

    Moore, D.F.: Principles and Applications of Tribology, 1st edn. Pergamon Press, Oxford (1975)

    Google Scholar 

  2. 2.

    Bhushan, B.: Introduction to Tribology. Wiley, New York (2002)

    Google Scholar 

  3. 3.

    Holmberg, K., Andersson, P., Erdemir, A.: Global energy consumption due to friction in passenger cars. Tribol. Int. 47, 221–234 (2012)

    Article  Google Scholar 

  4. 4.

    Dowson, D.: History of Tribology. Longman, London (1979)

    Google Scholar 

  5. 5.

    Rabinowicz, E.: Friction and Wear of Materials. Wiley, New York (1965)

    Google Scholar 

  6. 6.

    Czichos, H.: Tribology: A Systems Approach to the Science and Technology of Friction, Lubrication, and Wear. Elsevier, New York (1978)

    Google Scholar 

  7. 7.

    Bowden, F.P., Gregory, J.N., Tabor, D.: Lubrication of metal surfaces by fatty acids. Nature 156, 97–101 (1945)

    Article  Google Scholar 

  8. 8.

    Ludema, K.C.: Friction, Wear, Lubrication: A Textbook in Tribology. CRC Press, Boca Raton (1996)

    Google Scholar 

  9. 9.

    Hutchings, I.M.: Tribology: Friction and Wear of Engineering Materials. Edward Arnold, London (1992)

    Google Scholar 

  10. 10.

    Blau, P.J.: Friction Science and Technology: From Concepts to Applications, 2nd edn. CRC Press, Boca Raton (2008)

    Google Scholar 

  11. 11.

    Shitara, Y., Suzuki, S., Kaimai, T., Nanao, H., Mori, S.: Improvement of tribological properties with gallic acid derivatives in boundary lubrication. J Jpn Soc Tribol 56(1), 55–61 (2011)

    Google Scholar 

  12. 12.

    Kalpakjian, S., Schmid, S.R.: Manufacturing Processes for Engineering Materials, 5th edn. Pearson Education, Upper Saddle River (2008)

    Google Scholar 

  13. 13.

    Kostetskii, B.I., Nosovskii, I.G., Karaulov, A.K., Bershadskii, L.I., Kostetskaya, N.B., Lyashko, V.A., Sagach, M.F.: The Surface Strength of Materials in Friction (In Russian). Tekhnika, Kiev (1976)

    Google Scholar 

  14. 14.

    Fischer, T.E.: Tribochemistry. Annu. Rev. Mater. Sci. 18, 303–323 (1988)

    Article  Google Scholar 

  15. 15.

    Felts, J.R., Oyer, A.J., Hernandez, S.C., Whitener, K.E., Robinson, J.T., Walton, S.G., Sheehan, P.E.: Direct mechanochemical cleavage of functional groups from graphene. Nat. Commun. 6, 6467 (2015)

    Article  Google Scholar 

  16. 16.

    Gosvami, N.N., Bares, J.A., Mangolini, F., Konicek, A.R., Yablon, D.G., Carpick, R.W.: Mechanisms of antiwear tribofilm growth revealed in situ by single-asperity sliding contacts. Science 348, 102–106 (2015)

    Article  Google Scholar 

  17. 17.

    Sundararajan, G., Roy, M.: Solid particle erosion behaviour of metallic materials at room and elevated temperatures. Tribol. Int. 30, 339–359 (1997)

    Article  Google Scholar 

  18. 18.

    Torosyan, A., Takacs, L.: Mechanochemical reaction at the interface between a metal plate and oxide powders. J. Mater. Sci. 39, 5491–5496 (2004)

    Article  Google Scholar 

  19. 19.

    Varenberg, M.: Towards a unified classification of wear. Friction 1, 333–340 (2013)

    Article  Google Scholar 

  20. 20.

    Vanysek, P.: Electrochemical series. http://issuu.com/time-to-wake-up/docs/electrochemical_redox_potential. Accessed June 16 2015

  21. 21.

    Calka, A., Wexler, D., Monaghan, B., Mosbah, A., Balaz, P.: Rapid reduction of copper sulfide (Cu2S) with elemental Fe and Mg using electrical discharge assisted mechanical milling (EDAMM). J. Alloy. Compd. 486, 492–496 (2009)

    Article  Google Scholar 

  22. 22.

    Dehm, G., Medres, B., Shepeleva, L., Scheu, C., Bamberger, M., Mordike, B.L., Mordike, S., Ryk, G., Halperin, G., Etsion, I.: Microstructure and tribological properties of Ni-based claddings on Cu substrates. Wear 225, 18–26 (1999)

    Article  Google Scholar 

  23. 23.

    Hirst, W., Hollander, A.E.: Surface finish and damage in sliding. Proc. R. Soc. Lon. Ser. A 337, 379–394 (1974)

    Article  Google Scholar 

  24. 24.

    Greenwood, J.A., Williamson, J.B.P.: Contact of nominally flat surfaces. Proc. R. Soc. Lon. Ser. A 295, 300–319 (1966)

    Article  Google Scholar 

  25. 25.

    Wang, Y.H., Wan, Y., Wang, W.X., Yang, S.Y.: Friction-reducing properties of stearic acid modification of the Cu2S film on the copper substrate. J. Alloy. Compd. 557, 179–183 (2013)

    Article  Google Scholar 

  26. 26.

    Rapoport, L., Fleischer, N., Tenne, R.: Fullerene-like WS2 nanoparticles: superior lubricants for harsh conditions. Adv. Mater. 15, 651–655 (2003)

    Article  Google Scholar 

  27. 27.

    Greenberg, R., Halperin, G., Etsion, I., Tenne, R.: The effect of WS2 nanoparticles on friction reduction in various lubrication regimes. Tribol. Lett. 17, 179–186 (2004)

    Article  Google Scholar 

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Acknowledgments

We acknowledge the support of the Grand Technion Energy Program, the Carl E. Schustak Energy Research and Development Fund, and the New York Metropolitan Research Fund to M.V. This work was performed in part at the Georgia Tech Institute for Electronics and Nanotechnology, a member of the National Nanotechnology Coordinated Infrastructure, which is supported by the National Science Foundation (Grant ECCS-1542174).

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Correspondence to Michael Varenberg.

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Varenberg, M., Ryk, G., Yakhnis, A. et al. Mechano-Chemical Surface Modification with Cu2S: Inducing Superior Lubricity. Tribol Lett 64, 28 (2016). https://doi.org/10.1007/s11249-016-0758-8

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Keywords

  • Plastic deformation
  • Surface activation
  • Solid-state chemistry
  • Surface films
  • Friction