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MM: Fachverband Metall- und Materialphysik
MM 27: Poster Session I
MM 27.33: Poster
Dienstag, 13. März 2018, 18:30–19:45, Poster E
Functional Principles of Nanostructured Particles as an Industrial Lubrication Oil Additive — •Alexander Beel, Katja Tönsing, and Dario Anselmetti — Experimental Biophysics & Applied Nanoscience, Bielefeld University, Germany
In contrast to conventional solid-state lubrication, the additivation with nanostructured particles not only facilitates the production of stable dispersions but also assures that particles will intrude quickly into the surface contact zone and create a protective layer.
In this contribution, we show by testing a dispersion including base oil, an additive package, and TiO2-nanostructured particles in disc-disc triboexperiments that TiO2-nanostructured particles yield a substantial friction reduction in specific material combinations. In order to clarify the mechanism of nanostructured particles as a lubricating agent, we discuss different approaches from literature, e.g. the ball-bearing effect, a surface polishing, the structural lubricity, rheological behavior, and a protective layer.
The friction reduction was observed in experiments where the lowest surface roughness was exhibited after the test procedure (polishing). As a consequence a titanium (dioxide) layer was built up on the disc surface which was detected with element-specific energy dispersive X-Ray analysis (EDX). By performing an experiment with used discs from a former TiO2-dispersion experiment, we could conclude that the surface polishing and the titanium layer play an essential role for superior friction performance where a ball-bearing effect could be excluded (Beel et al., 2017, Materials Today: Proceedings).