Abstract
Tribological characteristics of ultrahigh-molecular-weight polyethylene (UHMWPE)-based compositions with graphite and molybdenum disulfide are studied under conditions of dry friction, boundary lubrication, and abrasive wear. It is shown that, under dry sliding friction, the wear rate of UHMWPE-graphite and UHMWPE-MoS2 polymer compositions is halved as compared to that of pure UHMWP, while their mechanical characteristics change only slightly. Under the conditions of abrasive wear, the wear resistance of these composites increases by 1.3–1.5 times. Concentrations of the fillers, which are optimum for improving the wear resistance, are determined. The supramolecular structure and the topography of worn surfaces of the UHMWPE compositions with various concentrations of the fillers are examined. A comparative analysis of the wear resistance of the composites under conditions of dry friction and lubrication is carried out. Mechanisms of the wear of the UHMWPE-graphite and UHMWPE-MoS2 polymer compositions under conditions of dry sliding friction and abrasive wear are discussed.
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Original Russian Text © S.V. Panin, L.A. Kornienko, T. Nguen Suan, L.R. Ivanova, M.A. Poltaranin, S.V. Shil’ko, 2014, published in Trenie i Iznos, 2014, Vol. 35, No. 4, pp. 444–452.
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Panin, S.V., Kornienko, L.A., Nguen Suan, T. et al. Wear resistance of composites based on ultrahigh molecular weight polyethylene filled with graphite and molybdenum disulfide microparticles. J. Frict. Wear 35, 290–296 (2014). https://doi.org/10.3103/S1068366614040084
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DOI: https://doi.org/10.3103/S1068366614040084