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A low-friction graphene nanoplatelets film from suspension high velocity oxy-fuel thermal spray

Venturi, F.; Rance, G. A.; Thomas, J.; Hussain, T.

Authors

G. A. Rance

J. Thomas

T. Hussain



Abstract

The addition of graphene-based nanomaterials is known to improve the tribology properties of materials by lowering the coefficient of friction and reducing wear. The covering of small areas with thin graphene-based films is routinely carried out; however, a fast and efficient way of covering large areas represents an outstanding challenge. Here we present a method for the deposition of graphene nanoplatelets (GNPs) on stainless steel substrates based on suspension high-velocity oxy fuel thermal spray. GNPs were radially injected into the combustion jet, providing sufficient momentum and moderate heat transfer to facilitate effective bonding with the substrate. Upon unlubricated ball-on-disc wear testing against an alumina counterbody, GNPs undergo gradual exfoliation, covering the substrate and thus lowering the friction coefficient ([less than] 0.1). We have reported the formation of a thin layer, composed of GNPs having different amounts of disorder, which protects the underlying substrate from wear. GNP structural ordering is studied throughout deposition and wear tests, showing an increase of inter- and intralayer disorder at the nanoscale, whilst largely preserving the GNP microstructure.

Journal Article Type Article
Publication Date Feb 21, 2019
Journal AIP Advances
Electronic ISSN 2158-3226
Publisher AIP Publishing
Peer Reviewed Peer Reviewed
Volume 9
Issue 2
Pages 025216
Institution Citation Venturi, F., Rance, G. A., Thomas, J., & Hussain, T. (2019). A low-friction graphene nanoplatelets film from suspension high velocity oxy-fuel thermal spray. AIP Advances, 9(2), 025216. https://doi.org/10.1063/1.5089021
DOI https://doi.org/10.1063/1.5089021
Keywords General Physics and Astronomy
Publisher URL https://aip.scitation.org/doi/10.1063/1.5089021
Additional Information Received: 2019-01-16; Accepted: 2019-02-13; Published: 2019-02-21

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