Properties of sputter-deposited MoS2/metal composite coatings deposited by closed field unbalanced magnetron sputter ion plating

Rigato, V, Maggioni, G, Patelli, A, Boscarino, D, Renevier, Nathalie orcid iconORCID: 0000-0003-2471-7236 and Teer, D.G (2000) Properties of sputter-deposited MoS2/metal composite coatings deposited by closed field unbalanced magnetron sputter ion plating. Surface and Coatings Technology, 131 (1-3). pp. 206-210.

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Official URL: http://dx.doi.org/10.1016/S0257-8972(00)00797-0

Abstract

It has been proved that the co-deposition of a proper amount of titanium can significantly improve the properties of sputter-deposited MoS2 coatings, leading to the deposition of coatings, which are harder, much more wear resistant and also less sensitive to atmospheric water vapour during tribological testing. The MoS2/Ti coatings, studied here by the authors, also give excellent industrial results in a wide range of applications. In this paper the mechanical and micro-structural properties of MoS2 coatings containing titanium with molar fractions up to 0.44 are studied. The mechanical properties are tested with pin-on-disk and reciprocating wear tests (multipass) in different experimental conditions. Frictional force and friction coefficient against a number of cycles are recorded. Coatings composition is determined by Rutherford and non-Rutherford backscattering (RBS) and coating thickness is measured by cross-section scanning electron microscopy (SEM). Structural analysis is carried out using X-ray diffraction (XRD). The mechanical properties are presented as a function of the Ti content and the optimal titanium concentration is determined. Other metals like Cr, W, Zr and Mo are also investigated. The composition of MoS2/metal composite coatings of the same quality of the MoS2/Ti films (‘optimized’ coatings) is studied by RBS.


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