The Tribological Behavior of Hybrid Graphene/Tungsten Disulfide Nanoparticle Coatings

  • O. A. GaliEmail author
  • A. R. Riahi


Environmental concerns regarding the disposal of fluid lubricants have led to the application of green technologies to metalworking processes in the form of dry lubricants. These dry lubricants are typically applied as spray coatings that employ the use of nanoparticles. The possible use of graphene in the form of graphene/tungsten disulfide (G/WS2) nanoparticle spray coatings has been examined in this research. The investigation was performed through the use of ball-on-disk tests at ambient temperatures to ascertain the possible application of the aerosol spray coatings to the aluminum forming processes. The coatings proved to possess good adhesion to the Al-Mg alloy substrate. The nanoparticle spray coatings were tested at various graphene to WS2 concentrations and under varying loads. A low steady-state COF was noted for all graphene concentrations during sliding contact under all the loads examined. The durability of the coatings was observed to improve with increasing loads. The low COF was attributed to the formation of wear-induced transfer layers on the steel balls and tribolayers on the coated Al-Mg surfaces. The coating durability was related to the concentration of graphene within the nanoparticle spray coatings and the stability of the tribolayers during sliding contact. The results highlight that the G/WS2 nanoparticle spray coatings could be considered for aluminum metalworking processes.


aluminum wear forming graphene nanomaterials shaping stamping tribolayers tungsten disulfide 



Financial support for this research is provided by the Natural Sciences and Engineering Research Council of Canada (NSERC). The authors would like to gratefully acknowledge the Canadian Center for Electron Microscopy, McMaster University, Hamilton, ON, for their assistance with the HR-SEM and TEM micrographs. The authors would like to thank Dr. A. Edrisy and Mr. R.N.N. Tamtam for their contributions to the experiments and insightful comments.


  1. 1.
    D. Berman, A. Erdemir, and A.V. Sumant, Few Layer Graphene to Reduce Wear and Friction on Sliding Steel Surfaces, Carbon, 2013, 54, p 454–459. CrossRefGoogle Scholar
  2. 2.
    D. Berman, A. Erdemir, and A.V. Sumant, Graphene: A New Emerging Lubricant, Mater. Today, 2014, 17, p 31–42. CrossRefGoogle Scholar
  3. 3.
    R. Buzio, A. Gerbi, S. Uttiya, C. Bernini, A.E. Del Rio Castillo, F. Palazon, A.S. Siri, V. Pellegrini, L. Pellegrino, and F. Bonaccorso, Ultralow Friction of Ink-Jet Printed Graphene Flakes, Nanoscale, 2017, 9, p 7612–7624. CrossRefGoogle Scholar
  4. 4.
    H.J. Kim, O.V. Penkov, and D.E. Kim, Tribological Properties of Graphene Oxide Nanosheet Coating Fabricated by Using Electrodynamic Spraying Process, Tribol. Lett., 2015, 57, p 27. CrossRefGoogle Scholar
  5. 5.
    H.J. Kim, D.G. Shin, and D.E. Kim, Frictional Behavior Between Silicon and Steel Coated with Graphene Oxide in Dry Sliding and Water Lubrication Conditions, Int. J. Precis. Eng. Manuf. Green Technol., 2016, 3, p 91–97. CrossRefGoogle Scholar
  6. 6.
    O. Penkov, H.J. Kim, H.J. Kim, and D.E. Kim, Tribology of Graphene: A Review, Int. J. Precis. Eng. Manuf., 2014, 15, p 577–585. CrossRefGoogle Scholar
  7. 7.
    M.S. Won, O.V. Penkov, and D.E. Kim, Durability and Degradation Mechanism of Graphene Coatings Deposited on Cu Substrates Under Dry Contact Sliding, Carbon, 2013, 54, p 472–481. CrossRefGoogle Scholar
  8. 8.
    Y. Tong, S. Bohmb, and M. Song, Graphene Based Materials and Their Composites as Coatings, Austin J. Nanomed. Nanotechnol., 2013, 1, p 1–16Google Scholar
  9. 9.
    P.E. Krajewski and A.T. Morales, Tribological Issues During Quick Plastic Forming, J. Mater. Eng. Perform., 2004, 13, p 700–709. CrossRefGoogle Scholar
  10. 10.
    J. Wei, A. Erdemir, and G.R. Fenske, Dry Lubricant Films for Aluminum Forming, Tribol. Trans., 2000, 43, p 535–541. CrossRefGoogle Scholar
  11. 11.
    K. Rao and J. Wei, Performance of a New Dry Lubricant in the Forming of Aluminum Alloy Sheets, Wear, 2001, 249, p 85–92. CrossRefGoogle Scholar
  12. 12.
    T. Polcar and A. Cavaleiro, Self-Adaptive Low Friction Coatings Based on Transition Metal Dichalcogenides, Thin Solid Films, 2011, 519, p 4037–4044. CrossRefGoogle Scholar
  13. 13.
    X. Quan, M. Hu, X. Gao, Y. Fu, L. Weng, D. Wang, D. Jiang, and J. Sun, Friction and WEAR Performance of Dual Lubrication Systems Combining WS2-MoS2 Composite Film and Low Volatility Oils Under Vacuum Condition, Tribol. Int., 2016, 99, p 57–66. CrossRefGoogle Scholar
  14. 14.
    T. Polcar and A. Cavaleiro, Review on Self-Lubricant Transition Metal Dichalcogenide Nanocomposite Coatings Alloyed with Carbon, Surf. Coat. Technol., 2011, 206, p 686–695. CrossRefGoogle Scholar
  15. 15.
    O.A. Gali, R.R.N. Tamtam, and A.R. Riahi, The Tribological Evaluation of Graphene Oxide and Tungsten Disulfide Spray Coatings During Elevated Temperature Sliding Contact of Aluminum-on-Steel, Surf. Coat. Technol., 2019, 357, p 604–618. CrossRefGoogle Scholar
  16. 16.
    K.R. Paton, E. Varrla, C. Backes, R.J. Smith, U. Khan, A. O’Neill, C. Boland, M. Lotya, O.M. Istrate, P. King, T. Higgins, S. Barwich, P. May, P. Puczkarski, I. Ahmed, M. Moebius, H. Pettersson, E. Long, J. Coelho, S.E. O’Brien, E.K. McGuire, B.M. Sanchez, G.S. Duesberg, N. McEvoy, T.J. Pennycook, C. Downing, A. Crossley, V. Nicolosi, and J.N. Coleman, Scalable Production of Large Quantities of Defect-Free Few-Layer Graphene by Shear Exfoliation in Liquids, Nat. Mater., 2014, 13, p 624–630. CrossRefGoogle Scholar
  17. 17.
    W.W. Liu, B.Y. Xia, X.X. Wang, and J.N. Wang, Exfoliation and Dispersion of Graphene in Ethanol-Water Mixtures, Front. Mater. Sci., 2012, 6, p 176–182. CrossRefGoogle Scholar
  18. 18.
    J. Ma, O.A. Gali, A.R. Riahi, The Tribological Behavior of As-Sprayed Graphene Oxide–Tungsten Disulfide Hybrid Coatings, Tribol. Transact., 2019, 62, p 828–838CrossRefGoogle Scholar
  19. 19.
    S. Ratha and C.S. Rout, Supercapacitor Electrodes Based on Layered Tungsten Disulfide-Reduced Graphene Oxide Hybrids Synthesized by a Facile Hydrothermal Method, ACS Appl. Mater. Interfaces., 2013, 5, p 11427–11433. CrossRefGoogle Scholar
  20. 20.
    Z. Hua Ni, Y. Ying Wang, T. Yu, and Z. Xiang Shen, Raman Spectroscopy and Imaging of Graphene, Nano Res. 1, p 237–291 (2008).
  21. 21.
    D. Berman, A. Erdemir, A.V. Zinovev, and A.V. Sumant, Nanoscale Friction Properties of Graphene and Graphene Oxide, Diam. Relat. Mater., 2015, 54, p 91–96. CrossRefGoogle Scholar
  22. 22.
    Y. Sun, Z. Chai, X. Lu, and J. Lu, Tribological Performance of a Tungsten Disulfide Lubricant Film Prepared by Atomic Layer Deposition Using Tungsten Hexacarbonyl and Hydrogen Sulfide as Precursors, Tribol. Int., 2017, 114, p 478–484. CrossRefGoogle Scholar
  23. 23.
    A. Tomala, S. Hernandez, M. Rodriguez Ripoll, E. Badisch, and B. Prakash, Tribological Performance of Some Solid Lubricants for Hot Forming Through Laboratory Simulative Tests, Tribol. Int., 2014, 74, p 164–173. CrossRefGoogle Scholar
  24. 24.
    D. Marchetto, C. Held, F. Hausen, F. Wählisch, M. Dienwiebel, and R. Bennewitz, Friction and Wear on Single-Layer Epitaxial Graphene in Multi-Asperity Contacts, Tribol. Lett., 2012, 48, p 77–82. CrossRefGoogle Scholar
  25. 25.
    J. Zhao, Y. He, Y. Wang, W. Wang, L. Yan, and J. Luo, An Investigation on the Tribological Properties of Multilayer Graphene and MoS 2 Nanosheets as Additives Used in Hydraulic Applications, Tribol. Int., 2016, 97, p 14–20. CrossRefGoogle Scholar
  26. 26.
    L.G. Cançado, A. Jorio, E.H.M. Ferreira, F. Stavale, C.A. Achete, R.B. Capaz, M.V.O. Moutinho, A. Lombardo, T.S. Kulmala, and A.C. Ferrari, Quantifying Defects in Graphene via Raman Spectroscopy at Different Excitation Energies, Nano Lett., 2011, 11, p 3190–3196. CrossRefGoogle Scholar
  27. 27.
    Z. Luo, T. Yu, Z. Ni, S. Lim, H. Hu, J. Shang, L. Liu, Z. Shen, and J. Lin, Electronic Structures and Structural Evolution of Hydrogenated Graphene Probed by Raman Spectroscopy, J. Phys. Chem. C, 2011, 115, p 1422–1427. CrossRefGoogle Scholar
  28. 28.
    D. Berman, A. Erdemir, and A.V. Sumant, Reduced Wear and Friction Enabled by Graphene Layers on Sliding Steel Surfaces in Dry Nitrogen, Carbon, 2013, 59, p 167–175. CrossRefGoogle Scholar
  29. 29.
    F. Gustavsson and S. Jacobson, Diverse Mechanisms of Friction Induced self-Organisation into a Low-Friction Material - An Overview of WS2 Tribofilm Formation, Tribol. Int., 2016, 101, p 340–347. CrossRefGoogle Scholar
  30. 30.
    F. Gustavsson, F. Svahn, U. Bexell, and S. Jacobson, Nanoparticle Based and Sputtered WS2 Low-Friction Coatings–Differences and Similarities with Respect to Friction Mechanisms and Tribofilm Formation, Surf. Coat. Technol., 2013, 232, p 616–626. CrossRefGoogle Scholar
  31. 31.
    X. Quan, X. Gao, L. Weng, M. Hu, D. Jiang, D. Wang, J. Sun, and W. Liu, Tribological Behavior of WS 2 -Based Solid/Liquid Lubricating Systems Dominated by the Surface Properties of WS 2 Crystallographic Planes, RSC Adv., 2015, 5, p 64892–64901. CrossRefGoogle Scholar

Copyright information

© ASM International 2019

Authors and Affiliations

  1. 1.Department of Mechanical, Automotive and Materials EngineeringUniversity of WindsorWindsorCanada

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