Interferometry measurement of lubricating films in slider-on-disc contacts

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)71-79
Journal / PublicationTribology Letters
Volume39
Issue number1
Publication statusPublished - Jul 2010

Abstract

Interferometry proves to be an efficient way to measure thin lubricant film thickness. However, there are very few reports on the film thickness measurement of conformal lubricated contacts using optical interferometry due to experimental difficulties. In this article, a custom-built test apparatus is introduced, in which a lubricated conformal contact is made between a stationary fixed-incline slider and a moving transparent disc. With a flexible holder, the slider can be positioned in such a way that a specified inclination with respect to the flat disc plane can be obtained. When the disc rotates and the slider is loaded against it, lubricating films are generated. The minimum film thickness h m at the exit can be determined by interference intensity changes. Measurement error correction in the film thickness was discussed. Case experiments were carried out using the new test apparatus. The credibility of the measurement system is validated by good correlation between the experiments and the theoretical results. The applicability is demonstrated by the film thickness measurement under different inclinations, loads, velocities, lubricants and slider materials. Amongst those case experiments, it is highlighted that the influences of solid/liquid interface properties on the lubrication behaviours can be clearly identified in terms of film thickness. © 2010 Springer Science+Business Media, LLC.

Research Area(s)

  • Film thickness, Hydrodynamic lubrication, Interferometry, Slider-bearing

Citation Format(s)

Interferometry measurement of lubricating films in slider-on-disc contacts. / Guo, F.; Wong, P. L.; Fu, Z. et al.
In: Tribology Letters, Vol. 39, No. 1, 07.2010, p. 71-79.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review