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Title

Solid lubricant behavior of MoS2 and WSe2-based nanocomposite coatings

AuthorsDomínguez-Meister, Santiago ; Rojas, T. Cristina; Brizuela, Marta; Sánchez-López, J.C.
KeywordsFunctionally graded material
Raman spectroscopy
Analytical electron
Microscopy; structure– property relationship
Friction
Issue Date2017
PublisherTaylor & Francis
CitationScience and Technology of Advanced Materials,18:1, 122-133 (2017)
AbstractTribological coatings made of MoS2 and WSe2 phases and their corresponding combinations with tungsten carbide (WC) were prepared by non-reactive magnetron sputtering of individual targets of similar composition. A comparative tribological analysis of these multiphase coatings was done in both ambient air (30–40% relative humidity, RH) and dry nitrogen (RH<7%) environments using the same tribometer and testing conditions. A nanostructural study using advanced transmission electron microscopy of the initial coatings and examination of the counterfaces after the friction test using different analytical tools helped to elucidate what governs the tribological behavior for each type of environment. This allowed conclusions to be made about the influence of the coating microstructure and composition on the tribological response. The best performance obtained with a WSex film (specific wear rate of 2 × 10−8 mm3 N–1m–1 and a friction coefficient of 0.03–0.05) was compared with that of the well-established MoS2 lubricant material
Publisher version (URL)http://dx.doi.org/10.1080/14686996.2016.1275784
URIhttp://hdl.handle.net/10261/150556
DOI10.1080/14686996.2016.1275784
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