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Tribology Letters
Erschienen in: Tribology Letters 1/2010

01.10.2010 | Original Paper

Microtribological Performance of Au–MoS2 and Ti–MoS2 Coatings with Varying Contact Pressure

verfasst von: Pantcho Stoyanov, Richard R. Chromik, David Goldbaum, Jeffrey R. Lince, Xiaoling Zhang

Erschienen in: Tribology Letters | Ausgabe 1/2010

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Abstract

Solid lubricant coatings with co-sputtered metal and MoS2 have shown favorable macrotribological properties at a wide range of contact stresses and humidity levels. These materials are also candidates for use in microcontacts and micro-electromechanical systems (MEMS), but their performance at this scale is poorly understood. For this study, microtribological properties of Au–MoS2 and Ti–MoS2 coatings, with varying metal additives of less than 15 at%, were examined using a nanoindentation instrument. Titanium and gold were chosen for this study as metal additives due to their different influence on the mechanical properties of the coating. The hardness and reduced modulus of the coatings increased with the addition of metal, when compared to pure MoS2. Reciprocating microscratch tests were performed with two spherical diamond tips (50 and 10 μm radii) in dry air. A range of normal loads were used between 0.2 and 5.0 mN. Friction and wear measurements were analyzed with respect to the variation in the contact pressure and compared to literature studies performed at the macroscale. Correlations were found between the coating mechanical properties, tip-coating adhesion, interfacial shear strength, and the formation of transfer films and tribofilms.
Vorheriger Artikel Low-Energy-Electron-Stimulated Degradation of a Multiply Alkylated Cyclopentane Oil and Implications for Space Bearings

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Metadaten
Titel
Microtribological Performance of Au–MoS2 and Ti–MoS2 Coatings with Varying Contact Pressure
verfasst von
Pantcho Stoyanov
Richard R. Chromik
David Goldbaum
Jeffrey R. Lince
Xiaoling Zhang
Publikationsdatum
01.10.2010
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 1/2010
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-010-9657-6

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