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Tribology Letters
Erschienen in:

01.12.2016 | Original Paper

The Effects of Graphite Filler on the Tribological Properties of Polydopamine/PTFE Coatings

verfasst von: Samuel Beckford, Jiyu Cai, Robert A. Fleming, Min Zou

Erschienen in: Tribology Letters | Ausgabe 3/2016

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Abstract

This investigation examines the effects of incorporating graphite as a filler in the polytetrafluoroethylene (PTFE) topcoat of a polydopamine/PTFE dual-layer coating. Polydopamine (PDA) is used to enhance the adhesion of PTFE coatings to the substrate, and graphite is used to improve the formation of a transfer film on the counterface and to take advantage of the low-friction properties of graphite. The results show that incorporating only 1.0 wt% graphite in PDA/PTFE coatings can increase their durability fivefold and reduce friction by 17 %. Examination of the wear morphology indicates that these improvements in tribological properties are in fact the result of the formation of a transfer film on the counterface that allows the coating to essentially slide against itself, creating a low shear strength interface that exhibits exceptionally low friction and low wear. Linearly increasing load scratch tests show that the improvement in durability is also the result of improved adhesion between the PTFE topcoat and the PDA basecoat, preventing large-scale delamination of the coating.
Vorheriger Artikel Effect of 2D Boron Nitride Nanoplate Additive on Tribological Properties of Natural Oils
Nächster Artikel Investigation on Material Response to Ultrahigh Velocity Impact on Ceramics by Micro Particle

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Metadaten
Titel
The Effects of Graphite Filler on the Tribological Properties of Polydopamine/PTFE Coatings
verfasst von
Samuel Beckford
Jiyu Cai
Robert A. Fleming
Min Zou
Publikationsdatum
01.12.2016
Verlag
Springer US
Erschienen in
Tribology Letters / Ausgabe 3/2016
Print ISSN: 1023-8883
Elektronische ISSN: 1573-2711
DOI
https://doi.org/10.1007/s11249-016-0777-5

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