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Friction and Wear of MoS2 Films on Laser Textured Steel Surfaces

[+] Author Affiliations
Lev Rapoport, Alexey Moshkovich, Vladislav Perfilyev, Igor Lapsker

Holon Institute of Technology, Holon, Israel

Gregory Halperin, Yan Itovich, Izhak Etsion

Technion-Israel Institute of Technology, Haifa, Israel

Paper No. ESDA2008-59068, pp. 353-359; 7 pages
doi:10.1115/ESDA2008-59068
From:
  • ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis
  • Volume 3: Design; Tribology; Education
  • Haifa, Israel, July 7–9, 2008
  • Conference Sponsors: International
  • ISBN: 978-0-7918-4837-1 | eISBN: 0-7918-3827-7
  • Copyright © 2008 by ASME

abstract

Incorporation of solid lubricant into micro-reservoirs produced by Laser Surface Texturing (LST) and its effect on the tribological properties of surfaces under dry friction is studied. The density of the dimple reservoirs and the height of the bulges around them are investigated in terms of the longevity of solid lubricant films burnished on LST steel surfaces. Friction tests were performed using a ball-on-flat device. Optimum density (40–50%) of the dimples is revealed. It is shown that the adhesion of solid lubricant in the space between the dimples is provided by mechanical engagement of particles in the rough surface and by smearing the solid lubricant around the dimples. Best results are obtained with the surfaces that were lapped to half of the height of bulges. Long wear life of burnished film on LST steel surfaces is apparently provided by preservation of thin MoS2 film around the bulges and by supply of solid lubricant from the dimples to the surface. The effect of repeated burnishing on wear life of solid lubricant films was studied. Repeating burnishing leading to increasing the density of solid lubricant films increases the wear life.

Copyright © 2008 by ASME
Topics: Friction , Wear , Lasers , Steel

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