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PFPE-Z lubricant thin films in molecular dynamics simulations – shear thinning and friction law

C. PIRGHIE1,* , A. C. PIRGHIE1, S. EDER2, F. FRANEK2,3

Affiliation

  1. Department of Mechanics and Technologies, Stefan cel Mare University of Suceava, Romania
  2. Austrian Center of Competence for Tribology, Viktor-Kaplan-Strasse 2, 2700 Wiener Neustadt, Austria
  3. Vienna University of Technology, Floragasse 7, 1040 Vienna, Austria

Abstract

A molecular dynamics simulation study has been conducted in order to point out the effect of steady shear and loading pressure on lubricant thin films. The model used in these simulations is composed of two solid walls and PFPE-Z lubricant. We apply steady shear by moving the walls in opposite directions while at the same time the upper wall exerts a constant load. The lubricant’s properties are investigated focusing on the shear thinning phenomenon and friction law. The obtained results could be used to improve computer hard disk systems..

Keywords

Molecular dynamics computer simulations, Nanolubrication, Barus law, Shear thinning, Friction law.

Citation

C. PIRGHIE, A. C. PIRGHIE, S. EDER, F. FRANEK, PFPE-Z lubricant thin films in molecular dynamics simulations – shear thinning and friction law, Optoelectronics and Advanced Materials - Rapid Communications, 7, 5-6, May-June 2013, pp.434-438 (2013).

Submitted at: Nov. 21, 2012

Accepted at: June 12, 2013