In this work, the interactions between two key additives in current lubricants (ZDDP and MoDTC) and the effect on tribofilm formation and tribofilm evolution under boundary lubrication are studied. The chemical and tribological characteristics of the tribofilms are probed using measurement of friction, wear and film characteristics. Tribofilms have been examined by energy dispersive X-ray analysis (EDX) and X-ray photoelectron spectroscopy (XPS). In order to investigate the morphology of the reaction films formed, atomic force microscopy (AFM) was used. In this work, for the first time, a link between a proposed MoDTC breakdown mechanism and MoDTC tribofilm characteristics, measured on experimentally derived tribofilms, is made.
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Acknowledgments
The authors would like to thank EPSRC, UK and Castrol Technology Centre, Pangbourne, UK for financial support of this project. The authors are grateful to Dr. Graham Beamson from NCESS in Daresbury Laboratory, UK for assistance and discussion of the XPS results.
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Morina, A., Neville, A., Priest, M. et al. ZDDP and MoDTC interactions and their effect on tribological performance – tribofilm characteristics and its evolution. Tribol Lett 24, 243–256 (2006). https://doi.org/10.1007/s11249-006-9123-7
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DOI: https://doi.org/10.1007/s11249-006-9123-7