Formation of metal-F bonds during frictional sliding: Influence of water and applied load

J. T. Shen, Y. T. Pei, J. Th. M. De Hosson*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Effects of water lubrication and applied load on the formation of PTFE transfer films and metal-F bonds during sliding when PTFE filled composites sliding against steel and Al2O3 are investigated. In water lubricated conditions, XPS analysis reveals that a thin layer of water molecules at the sliding interface inhibits the formation of PTFE transfer films and Al-F bonds on the Al2O3 ball, leading to a detrimental effect on the tribo-performance. Under various normal loads in dry sliding condition, it is found that the smearing of PTFE onto the wear surface of the composite and the transfer of PTFE onto the surface of the steel counterpart are stimulated by a high load. During sliding, the contact pressure is found to be the driving force of the reaction between steel and PTFE. It is concluded that under various loads, the total amount of PTFE transfer films has a larger impact on the friction behavior than the formation of Fe-F bonds. (C) 2016 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)427-434
Number of pages8
JournalApplied Surface Science
Volume368
DOIs
Publication statusPublished - 15-Apr-2016

Keywords

  • Polymer composites
  • Transfer films
  • Metal-fluoride bonds
  • X-ray photoelectron
  • RAY PHOTOELECTRON-SPECTROSCOPY
  • WEAR BEHAVIOR
  • PTFE COMPOSITE
  • POLYTETRAFLUOROETHYLENE
  • SURFACE
  • PERFORMANCE
  • STEEL
  • POLY(TETRAFLUOROETHYLENE)
  • ALUMINUM

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