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TECHNICAL PAPERS

The Effect of Film Thickness on Initial Friction of Elastic-Plastically Rough Surface With a Soft Thin Metallic Film

[+] Author and Article Information
Zhiqiang Liu, Anne Neville, R. L. Reuben

Department of Mechanical and Chemical Engineering, Heriot-Watt University, Edinburgh EH14 4AS, UK

J. Tribol 124(3), 627-636 (May 31, 2002) (10 pages) doi:10.1115/1.1454103 History: Revised July 19, 2001; Received September 14, 2001; Online May 31, 2002
Copyright © 2002 by ASME
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References

Figures

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AFM image of a scratch on a silver film deposited onto a smooth glass plate and surface profiles corresponding to three line scans across the scratch (shown in the AFM image by the solid lines)
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Dynamic coefficient of friction versus sliding distance for different film thicknesses (normal load=12 N, sliding velocity=17 mm/s)
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The wear resistance of silver films with different initial thicknesses (normal load=12 N, sliding velocity=17 mm/s)
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Static friction coefficient versus film thickness under a pressure of 11.35 Mpa
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Static friction coefficient versus pressure for steel on steel and steel on silver film (t=0.085 μm), respectively
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Energy dispersive X-ray analysis (a) for worn surface and (b) for wear debris
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Scanning electron micrograph of the edge of contact region on silver-coated plate (t=0.1 μm)
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Scanning electron micrograph of transferred film on the pin surface (normal load=12 N)
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Scanning electron micrograph of wear track after one stroke sliding (t=0.1 μm)
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Scanning electron micrograph of microcutting soft film on the pin from the plate after one stroke sliding (t=0.1 μm)
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Scanning electron micrographs of wear track on the plate after 1 m of sliding: (a) microcutting products; (b) patches or transfer film (t=0.1 μm).
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Scanning electron micrographs of wear track on the plate surface after 2 m of sliding (t=0.1 μm)
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The geometry of an asperity contact
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Dimensionless radius of the coated surface versus dimensionless radius of the substrate contact surface, for a single asperity contact
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Ratio of dimensionless contact area of coated surface to dimensionless contact area of substrate surface versus dimensionless substrate contact area, for a single asperity contact
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Static friction coefficient versus dimensionless external force
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Comparison of the calculated result with experimental data for F/AnE=10−4
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Comparison of the calculated result with experimental data, for t=0 and t=0.085 μm
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Effective hardness constant of film versus static friction coefficient for various film thicknesses at F/AnE=10−4
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The geometry of contacting rough surfaces with a thin film

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