Elsevier

Tribology International

Volume 151, November 2020, 106513
Tribology International

Effect of organic friction modifiers on lubrication of PEEK-steel contact

https://doi.org/10.1016/j.triboint.2020.106513Get rights and content
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Highlights

  • OFMs affect the friction and wear of oil lubricated PEEK-steel contacts.

  • N-oleoyl sarcosine exerts a significant and specific effect on tribological properties.

  • The type of contact motion i.e. sliding or sliding-rolling determines the impact of OFMs.

  • The tribological effect is related to the formation of PEEK transfer films on steel.

Abstract

The rapid adoption of the advantageous PEEK/steel pairing in many tribological applications has prompted intense research to optimize its lubrication. Thus, the role of organic friction modifiers (OFMs) in improving the lubrication of PEEK-steel contacts has been studied and their mechanism explained. Their effect on friction and wear depends on the type of contact motion (i.e. sliding or sliding-rolling) and the steel surface roughness. N-oleoyl sarcosine had a significant effect on tribological properties due to its ability to absorb strongly on both materials, inhibit the formation of PEEK transfer films on steel and thus exert either a positive or negative effect depending on the test conditions.

Keywords

Polyetheretherketone (PEEK)
Organic friction modifiers (OFMs)
Mixed and boundary lubrication
Sliding and sliding-rolling

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