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Authors
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Hoffmann, T. ; Lehmann, D. ; Schäffler, M.
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Title
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Additives for lubricants containing poly(tetrafluoroethylene). Part 2: Tribological characterization
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Date
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09.01.2012
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Number
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28825
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Abstract
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This article describes the tribological characterization of dispersions consisting of irradiated poly(tetrafluoroethylene) (PTFE) micropowder (Zonyl® MP1100) and an ester oil (Synative ES TMP 05). <br />A series of PTFE/oil dispersions were prepared with different amounts of PTFE micropowder (1025 wt%) to study the influence of the PTFE in these dispersions on their tribological properties. The PTFE/oil dispersion with 10 wt% PTFE micropowder was additionally synthesized in the presence of two additives which are derived from phosphoric acid to study the influence on the tribological properties. In addition, a physical mixture of the ester oil and the PTFE micropowder was prepared to illustrate the impact of the chemical coupling reaction with regard to the tribological properties. <br />A higher concentration of PTFE micropowder more clearly reduces the coefficient of friction in the ester oil. Low coefficient of friction and transition values from static to dynamic friction were observed. The resistance to wear was increased with the amount of PTFE micropowder in the dispersions and clearly reflects the difference between chemical coupling and physical mixture of the components.
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Publisher
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Journal of Engineering Tribology
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Wikidata
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Citation
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Journal of Engineering Tribology 226 (2012) 222-229
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DOI
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https://doi.org/10.1177/1350650111429916
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Tags
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