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Tribology Letters

, 66:128 | Cite as

Acid Treatment of Diamond-Like Carbon Surfaces for Enhanced Adsorption of Friction Modifiers and Friction Performance

  • Arman Mohammad Khan
  • Xingliang He
  • Hongxing Wu
  • Michael Desanker
  • Ali Erdemir
  • Yip-Wah Chung
  • Q. Jane Wang
Original Paper
  • 187 Downloads

Abstract

Diamond-like carbon (DLC) is a class of amorphous carbon materials used as wear-resistant coatings in tribo-components. The chemical inertness of DLC surfaces, while important in many applications, makes them incompatible with additives in commercial lubricants. Specifically, DLC surfaces do not permit strong adsorption of friction modifier molecules. This study aims at improving the adsorption of these friction modifier molecules on DLC surfaces through an acid treatment. Water contact angle measurements show that such a treatment results in improved hydrophilicity of the DLC. XPS analysis demonstrates 50% increase in the uptake of ArmeenT, an organic friction modifier, on DLC after the acid treatment. This increased ArmeenT adsorption is accompanied by marked decrease in friction in micro-scale friction experiments.

Keywords

DLC Surface treatment Surface adsorption Friction modifiers 

Notes

Acknowledgements

The authors gratefully acknowledge US Department of Energy for the research support under Contract DE-EE0006449 and US National Science Foundation for research support under Grant CMMI-1662606. We sincerely thank AkzoNobel for the generous supply of friction modifier used in this research. This work also made use of the EPIC facility of Northwestern University’s NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205), the MRSEC program (NSF DMR-1720139) at the Materials Research Center, the International Institute for Nanotechnology (IIN), the Keck Foundation, and the State of Illinois (through the IIN).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Arman Mohammad Khan
    • 1
  • Xingliang He
    • 1
  • Hongxing Wu
    • 1
    • 2
  • Michael Desanker
    • 3
  • Ali Erdemir
    • 4
  • Yip-Wah Chung
    • 1
    • 5
  • Q. Jane Wang
    • 1
  1. 1.Department of Mechanical EngineeringNorthwestern UniversityEvanstonUSA
  2. 2.Key Laboratory of Education Ministry for Modern Design and Rotor Bearing SystemsXi’an Jiaotong UniversityXi’anPeople’s Republic of China
  3. 3.Department of ChemistryNorthwestern UniversityEvanstonUSA
  4. 4.Energy Systems DivisionArgonne National LaboratoryLemontUSA
  5. 5.Department of Materials Science and EngineeringNorthwestern UniversityEvanstonUSA

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