Tribology Letters

, Volume 29, Issue 3, pp 193–199 | Cite as

Tribological Performance of UHMWPE and PFPE Coated Films on Aluminium Surface

Original Paper


A thin layer of Ultra High Molecular Weight Polyethylene (UHMWPE) or UHMWPE + PFPE is coated onto cylindrical aluminium (Al) pin (4.6 mm diametre) surface with the aim of providing wear resistant coating on this soft and tribologically poor metal. The coefficient of friction and wear life of the coated samples are investigated on a pin-on-disk tribometre under different normal loads (394–622 g) and two sliding speeds (0.1 and 0.31 m/s) against uncoated Al disk as the counterface. Both coatings provide coefficient of friction values in the range of 0.02–0.2 as compared to 0.4–1.0 for uncoated Al. There is tremendous improvement in the wear life of the pin, with UHMWPE + PFPE film giving wear life approximately twice to thrice higher than that with only UHMWPE film. A thin polymer film is transferred to the disk surface during sliding providing very long-term wear life (continuous low coefficient of friction) despite visual removal of the film from the pin surface. The present films will have applications in gears and bearings as solid or boundary lubricants for automotive and aerospace component.


Tribology Polymer coating Aluminium UHMWPE PFPE 



Authors would like to acknowledge the help of Silvia Martadinata for her help in conducting some initial polymer coating and tribological tests.


  1. 1.
    Tripathi K.C.: Correlation of chemical and mechanical effects of lubricants. Tribol. Int. 8(4), 146–152 (1975)CrossRefGoogle Scholar
  2. 2.
    Montgomery, R.S.: Chemical effects on wear in the lubrication of aluminum. Wear 8(4), 289–302 (1965)CrossRefGoogle Scholar
  3. 3.
    St. Pierre, L.E., Owens, R.S., Klint, R.V.: Chemical effects in the boundary lubrication of aluminum. Wear 9, 160–168 (1966)CrossRefGoogle Scholar
  4. 4.
    Gadow, R., Scherer, D.: Composite coating with dry lubrication ability on light metal substrates. Surf. Coat. Technol. 151–152, 471–477 (2002)CrossRefGoogle Scholar
  5. 5.
    Khatri, O.P., Biswas, S.K.: Thermal stability of octadecyltrichlorosilane self-assembled on a polycrystalline aluminium surface. Surf. Sci. 572, 228–238 (2004)CrossRefGoogle Scholar
  6. 6.
    Satyanarayana, N., Sinha, S.K., Ong, B.H.: Tribology of a novel UHMWPE/PFPE dual-film coated onto Si surface. Sens. Actuators A 128, 98–108 (2006)CrossRefGoogle Scholar
  7. 7.
    Satyanarayana, N., Sinha, S.K.: Tribology of PFPE overcoated self-assembled monolayers deposited on Si surface. J. Phys. D Appl. Phys. 38, 3512–3522 (2005)CrossRefGoogle Scholar
  8. 8.
    Satyanarayana, N., Sinha, S.K, Shen, L.: Effect of molecular structure on friction and wear of polymer thin films deposited on Si surface. Tribol. Lett. 28, 71–80 (2007)CrossRefGoogle Scholar
  9. 9.
    Lavielle, L.: Polymer-polymer friction: relation to adhesion. Wear 151, 63–75 (1991)CrossRefGoogle Scholar
  10. 10.
    Eiss, N.S. Jr., McCann, B.P.: Frictional instabilities in polymer-polymer sliding. Tribol. Trans. 36(4), 686–692 (1993)CrossRefGoogle Scholar
  11. 11.
    Bhushan B.: Principles and Applications of Tribology, pp. 722–723. John Wiley (1999)Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Sujeet K. Sinha
    • 1
  • Catherine B. Lee
    • 1
  • S. C. Lim
    • 1
  1. 1.Department of Mechanical EngineeringNational University of SingaporeSingaporeSingapore

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