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Influence of laser-produced microstructures on the tribological behaviour of ceramics

Authors
Journal
Surface and Coatings Technology
0257-8972
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0257-8972(97)00581-1
Keywords
  • Tribology
  • Excimer Laser
  • Microstructuring
  • Ceramics
Disciplines
  • Mathematics

Abstract

Abstract Ceramic surfaces were microstructured by excimer laser radiation in order to improve the tribological properties under hydrodynamic and elastohydrodynamic sliding conditions. The laser-induced lubricant pockets generated high local pressures and thus caused a thicker lubricant film, allowing an optimal separation of the contact surfaces even at lower sliding velocities. Wear-intensive boundary lubrication at frequent starting and running-out procedures may be minimized. Initial studies investigating the influence of different geometries of lubricant pockets on the film thickness were carried out using a block-on-ring tribometer. The results for alumina and silicon carbide showed that the structuring of the surface topography resulted in a significant improvement in the lubricant film thickness compared with untreated surfaces.

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