High temperature friction and wear properties of graphene oxide/polytetrafluoroethylene composite coatings deposited on stainless steel

N. Nemati, M. Emamy, S. Yau, J. K. Kim, Dae Eun Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Polytetrafluoroethylene (PTFE) coating is known as a low friction material that is often used as a solid lubricant coating. However, due to its relatively weak mechanical strength, wear has been a critical issue which needs to be overcome. In the present work, a composite coating composed of PTFE and graphene oxide (GO) was investigated with the aim to significantly improve the wear resistance of PTFE, in both room and elevated temperature conditions. PTFE/GO (PG) composite coatings with varying amounts of GO in the PTFE matrix were successfully deposited on stainless steel (SS) substrates by the spin coating method. Both micro- and macro-scale tests were performed in order to assess the tribological properties of the coatings under a wide range of normal load. Results of the micro-scale tests showed that the coefficient of friction and the wear rate could be remarkably reduced to 0.1 and 0.65 × 10-9 mm3 N-1 m-1, respectively, with inclusion of 15 vol% of GO in the PTFE matrix. This coating also demonstrated low friction and wear properties up to 400 °C in the macro-scale tests. The superior tribological properties of the PG coating were attributed to the synergistic effects of PTFE and GO. Specifically, the existence of a rather homogeneous dispersion of high strength GO in the low friction PTFE matrix allowed for generation of a self-lubricating film along the wear track.

Original languageEnglish
Pages (from-to)5977-5987
Number of pages11
JournalRSC Advances
Volume6
Issue number7
DOIs
Publication statusPublished - 2016 Jan 1

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Composite coatings
Stainless Steel
Polytetrafluoroethylene
Polytetrafluoroethylenes
Oxides
Graphene
Stainless steel
Wear of materials
Friction
Coatings
Temperature
Macros
Friction materials
Solid lubricants
Spin coating
Wear resistance
Strength of materials
Substrates

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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title = "High temperature friction and wear properties of graphene oxide/polytetrafluoroethylene composite coatings deposited on stainless steel",
abstract = "Polytetrafluoroethylene (PTFE) coating is known as a low friction material that is often used as a solid lubricant coating. However, due to its relatively weak mechanical strength, wear has been a critical issue which needs to be overcome. In the present work, a composite coating composed of PTFE and graphene oxide (GO) was investigated with the aim to significantly improve the wear resistance of PTFE, in both room and elevated temperature conditions. PTFE/GO (PG) composite coatings with varying amounts of GO in the PTFE matrix were successfully deposited on stainless steel (SS) substrates by the spin coating method. Both micro- and macro-scale tests were performed in order to assess the tribological properties of the coatings under a wide range of normal load. Results of the micro-scale tests showed that the coefficient of friction and the wear rate could be remarkably reduced to 0.1 and 0.65 × 10-9 mm3 N-1 m-1, respectively, with inclusion of 15 vol{\%} of GO in the PTFE matrix. This coating also demonstrated low friction and wear properties up to 400 °C in the macro-scale tests. The superior tribological properties of the PG coating were attributed to the synergistic effects of PTFE and GO. Specifically, the existence of a rather homogeneous dispersion of high strength GO in the low friction PTFE matrix allowed for generation of a self-lubricating film along the wear track.",
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High temperature friction and wear properties of graphene oxide/polytetrafluoroethylene composite coatings deposited on stainless steel. / Nemati, N.; Emamy, M.; Yau, S.; Kim, J. K.; Kim, Dae Eun.

In: RSC Advances, Vol. 6, No. 7, 01.01.2016, p. 5977-5987.

Research output: Contribution to journalArticle

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