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Title of Journal: Tribol Lett

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Abbravation: Tribology Letters

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Springer US

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DOI

10.1007/bf00040952

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1573-2711

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Frictional Voltammetry with Copper

Authors: N Argibay W G Sawyer
Publish Date: 2012/04/05
Volume: 46, Issue: 3, Pages: 337-342
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Abstract

This paper presents an experimental study correlating frictional behavior with in situ voltammetry for a unidirectional sliding contact between a hemispherical tipped alumina probe and a flat rotating copper counterface maximum Hertzian contact pressure of 68 MPa and sliding speed of 10 mm/s The contact was immersed in an aqueous 01 M Na2CO3 solution pH ∼11 where the copper counterface acted as the working electrode in a potentiostat controlled threeelectrode cell a coiled Pt wire was used as the counter electrode and a saturated calomel electrode SCE as the reference Clear and reproducible trends were found between friction coefficient and published data suggesting the onset of particular redox reactions graphically presented in a frictional voltammetry plot At anodic potentials primarily associated with the formation of copperI oxide Cu2O V vs SCE ∼−025 the measured friction coefficient was in the range μ ∼04–05 At cathodic potentials primarily associated with the formation of CuO CuOH2 and CuCO3 V vs SCE ∼−010 the friction coefficient transitions to the range μ ∼07–10 At sustained cathodic potentials associated with reduction of the native copper oxide Cu2O V vs SCE ∼−065 the friction coefficient is observed to fluctuate between μ ∼02 and 05 arguably a result of exposure of bare copper due to nonuniform reduction fractional coverage of Cu2O


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Other Papers In This Journal:

  1. A Film Thickness Correction Formula for Double-Newtonian Shear-Thinning in Rolling EHL Circular Contacts
  2. An investigation into friction behaviour of dispersion-strengthened copper under severe railway braking conditions
  3. In Situ NbC Particulate-Reinforced Iron Matrix Composite: Microstructure and Abrasive Wear Characteristics
  4. The Role of Ferric Oxide Nanoparticles in Improving Lubricity and Tribo-Electrochemical Performance During Chemical–Mechanical Polishing
  5. Influence of Post-treatment on the Microstructural and Tribomechanical Properties of Suspension Thermally Sprayed WC–12 wt%Co Nanocomposite Coatings
  6. Lateral Vibration Analysis of Flexible Shafts Supported on Elliptical Journal Bearings
  7. Influence of Friction on Surface Asperity Flattening Process in Cold Uniaxial Planar Compression (CUPC)
  8. Effect of Surface Roughening of Substrate Steel on the Improvement of Delamination Strength and Tribological Behavior of Hydrogenated Amorphous Carbon Coating Under Lubricated Conditions
  9. Transmission Electron Microscopy Analysis of Mo–W–S–Se Film Sliding Contact Obtained by Using Focused Ion Beam Microscope and In Situ Microtribometer
  10. Effect of Chromium on Oxidation in Wear of Surface Nanocrystalline Martensite Steel
  11. Design of a New Tribometer for Tribological and Viscoelasticity Studies of PTFE Valve Seats
  12. Tribochemistry of Bulk Zinc Metaphosphate Glasses
  13. Simulation of Hydrocarbon Oil Contamination at the Head–Disk Interface Using Molecular Dynamics
  14. Impact Abrasive Wear Response of Carbon/Carbon Composites at Elevated Temperatures
  15. Analyzing Periodic Signals in Rotating Pin-on-Disc Tribotest Measurements Using Discrete Fourier Transform Algorithm
  16. Polymer-Brush Lubrication in Oil: Sliding Beyond the Stribeck Curve
  17. Explanation for the mechanical strength of amyloid fibrils
  18. Experimental investigation of frictional and viscoelastic properties of intestine for microendoscope application
  19. The Role of Functional End Groups of Perfluoropolyether (Z-dol and Z-03) Lubricants in Augmenting the Tribology of SU-8 Composites
  20. Dissipation of Vibration in Rough Contact
  21. Movement of Entrapped Oil Under Pure Rolling Conditions
  22. Study on Surface Asperity Flattening in Cold Quasi-Static Uniaxial Planar Compression by Crystal Plasticity Finite Element Method
  23. High-Temperature Friction and Wear of Ag/h-BN-Containing Ni-based Composites Against Steel

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