Tribology Letters

, Volume 24, Issue 2, pp 105–114 | Cite as

Interpretation of experiments on ZDDP anti-wear films through pressure-induced cross-linking

  • N.J. Mosey
  • T.K. Woo
  • M. Kasrai
  • P.R. Norton
  • G.M. Bancroft
  • M.H. Müser


We review a recently developed molecular-level theory for the formation and functionality of zinc dialkyldithiophosphate anti-wear films [N. J. Mosey, M. H. Müser and T. K. Woo, Science 307 (2005) 1612]. This theory is based on the idea that pressure-induced cross-linking leads to chemically connected networks. The formation of cross-links modifies the mechanical properties of the films such that wear inhibition may be enhanced. Furthermore, the networks remain intact upon release of the pressure, which resists flow of the film out of the contact area. The ability of the theory to account for a diverse body of experimental data related to anti-wear additives and films is discussed. Routes towards the development of new AW additives are also suggested on the basis of the theory.

Key Words

zinc dialkyldithiophosphates anti-wear films ab initio molecular dynamics 



The Natural Sciences and Engineering Research Council of Canada, General Motors of Canada Limited and General Motors Research and Development are gratefully acknowledged for financial support. Computational resources were made available by the Canadian Foundation for Innovation, the Ontario Innovation Trust, SHARCNet of Canada and the Academic Development Fund at the University of Western Ontario.


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • N.J. Mosey
    • 1
  • T.K. Woo
    • 1
    • 2
  • M. Kasrai
    • 1
  • P.R. Norton
    • 1
  • G.M. Bancroft
    • 1
  • M.H. Müser
    • 3
  1. 1.Department of ChemistryUniversity of Western OntarioLondonCanada
  2. 2.Department of ChemistryUniversity of OttawaOttawaCanada
  3. 3.Department of Applied MathematicsUniversity of Western OntarioLondonCanada

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