Microstructure, chemical and tribological investigations of Mo x W1−x S y co-sputtered composite films

MoxW1−xSy composite films were co-sputtered by the combination of MoS2 and WS2 targets, which were shown to have much superior tribological performance with lower and more stable friction coefficient, longer durability and higher bearing resistance than pure MoS2 films in room temperature air with a...

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Bibliographic Details
Published inTribology letters Vol. 22; no. 1; pp. 37 - 43
Main Authors Yin, G. L., Huang, P. H., Yu, Z., He, D. N., Tu, J. P.
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.04.2006
Subjects
Coefficient of friction
Durability
Electron microscopy
Friction reduction
Friction resistance
Ions
Lubrication
Microscopy
Microstructure
Molybdenum disulfide
Organic chemistry
Oxidation resistance
Photoelectrons
Relative humidity
Tribology
Tungsten disulfide
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Summary:MoxW1−xSy composite films were co-sputtered by the combination of MoS2 and WS2 targets, which were shown to have much superior tribological performance with lower and more stable friction coefficient, longer durability and higher bearing resistance than pure MoS2 films in room temperature air with a relative humidity of 45–50%. Especially for the Mo0.6W0.4S1.6 (40 at.% WS2) composite film, an increase in durability of more than a one order of magnitude was reached. X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy were used to investigate the relationship between the microstructure and the tribological performance of the films. The composite films are shown to have a densified structure and accordingly improved oxidation resistance and lubrication properties. Moreover, the composite films have a lattice expansion in the c direction, along with a reduced the friction within the films.
ISSN:1023-8883
1573-2711
DOI:10.1007/s11249-006-9070-3