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  • Various MoS [sub] 2-, WS [sub] 2- and C-based micro- and nanoparticles in boundary lubrication
    Kogovšek, Janez, 1984- ; Kalin, Mitjan
    Various solid lubricant particles have been experimentally evaluated as possible additives to oils. However, information in terms of a direct comparison of their tribological properties is still ... missing. In this study, we have compared the tribological properties of seven different solid lubricant micro- and nanoparticles as additives in polyalphaolefin (PAO) oil: MoS [sub] 2 nanotubes, MoS [sub] 2 platelets (2 and 10 um), WS [sub] 2 nanotubes, WS [sub] 2 fullerene-like nanoparticles, graphite platelets (20 um) and multi-walled carbon nanotubes. The experiments were performed in the boundary lubrication regime under a contact pressure of 1 GPa (Hertz, max) using a ball-on-disc tribotester. In general, the particles significantly decreased the friction and wear compared to the base PAO oil. We found that it was the material of the particles that largely determined their tribological performance. The effect of the size of the particles was much less important, and the morphology (shape) of the particles had little or no influence. We have also investigated the effect of ultrasonication during suspension preparation on particle damage and found that the solid lubricant particles were not notably affected, except the MoS [sub] 2 and WS [sub] 2 nanotubes, which became somewhat shorter.
    Vir: Tribology letters. - ISSN 1023-8883 (Vol. 53, iss. 3, Mar. 2014, str. 585-597)
    Vrsta gradiva - članek, sestavni del
    Leto - 2014
    Jezik - angleški
    COBISS.SI-ID - 13354523
    DOI

vir: Tribology letters. - ISSN 1023-8883 (Vol. 53, iss. 3, Mar. 2014, str. 585-597)
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