The effect of wetting on the microhydrodynamics of surfaces lubricated with water and oil

By taking a single asperity contact the hydrodynamic interaction of surfaces with modified wettability was investigated. It was shown that for water as well as for oil the Newtonian friction is valid even for a liquid film thickness in the lower nanometer range, provided that the liquid wets both su...

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Bibliographic Details
Published in:Wear 2003-05, Vol.254 (9), p.871-875
Main Authors: Hild, W., Opitz, A., Schaefer, J.A., Scherge, M.
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Friction, wear, lubrication
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Machine components
Mechanical engineering. Machine design
Mechanical instruments, equipment and techniques
Microhydrodynamic
Micromechanical devices and systems
Microtribology
Physics
Silicon
Solid-fluid interfaces
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:By taking a single asperity contact the hydrodynamic interaction of surfaces with modified wettability was investigated. It was shown that for water as well as for oil the Newtonian friction is valid even for a liquid film thickness in the lower nanometer range, provided that the liquid wets both surfaces. In the case of non-wetting surfaces, the Newtonian friction law breaks down and the hydrodynamic effect is reduced significantly. The results are discussed with respect to their application for microtechnology as well as for macroscopic applications.
ISSN:0043-1648
1873-2577
DOI:10.1016/S0043-1648(03)00238-2