Molecular dynamics of tribochemical reaction with ZDDP

Jean Martin, Tasuku Onodera, Hideyuki Tsuboi, Akira Endou, Michihisa Koyama, Mozomu Hatakeyama, Hiromitsu Takaba, Suzuki Ai, Clotilde Minfray, Momoji Kubo, Akira Miyamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Tribochemical reactions with ZDDP have been extensively studied thanks to analytical tool such as surface analysis (XPS, XANES) and analytical EF-TEM. Accurate characterization of the tribofilm composition has thus been obtained.However, results also show that the mechanism of friction and wear reduction by ZDDP is governed by atomic scale processes. Analytical techniques are at their limit and new methods are necessary to go further. In this work, we propose a study of tribochemical reactions of ZDDP using molecular dynamics. The tribofilm composition is modelized by zinc phosphate and/or thiophosphate. We show the mechanisms of transfer of the tribofilm material on an oxide layer as well as the digestion process of transition metal oxides nanoparticles in a simulated contact at a pressure of 1 GPa. As a whole, MD calculations show extremely good agreement with experiment simulations.

Original languageEnglish
Title of host publicationSociety of Tribologists and Lubrication Engineers - 2008 Annual Meeting and Exhibition, Extended Abstracts
Publication statusPublished - 2008
Externally publishedYes
Event2008 Annual Meeting of the Society of Tribologists and Lubrication Engineers, STLE 2008 - Cleveland, OH, United States
Duration: May 18 2008May 22 2008

Other

Other2008 Annual Meeting of the Society of Tribologists and Lubrication Engineers, STLE 2008
CountryUnited States
CityCleveland, OH
Period5/18/085/22/08

All Science Journal Classification (ASJC) codes

  • Colloid and Surface Chemistry
  • Process Chemistry and Technology
  • Surfaces and Interfaces

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