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A novel approach to incorporate graphene nanoplatelets to Cr2O3 for low-wear coatings

Venturi, F.; Pulsford, J.; Hussain, T.

Authors

J. Pulsford



Abstract

© 2020 Cr2O3 (chromia) coatings have been widely used in wear and corrosion resistant applications thanks to their good tribomechanical properties, and graphene nanoplatelets (GNPs) have been employed as nanofillers to further improve these properties. In this work, we propose a process to deposit chromia/GNPs composite coatings on stainless steel substrates using Suspension High Velocity Oxy-Fuel (S-HVOF) thermal spray. The coating showed good microhardness, with successful incorporation of GNPs showing no or minor spray-induced degradation. Compared to a chromia-only coating, the tribological performance improved: both coating and alumina counterbody specific wear rates lowered by 20 and 70% respectively and coefficient of friction decreased by 15%. This study shows a non-expensive and simple method to incorporate GNPs to improve material performance in large scale.

Journal Article Type Article
Publication Date Oct 1, 2020
Journal Materials Letters
Print ISSN 0167-577X
Electronic ISSN 1873-4979
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 276
Article Number 128283
APA6 Citation Venturi, F., Pulsford, J., & Hussain, T. (2020). A novel approach to incorporate graphene nanoplatelets to Cr2O3 for low-wear coatings. Materials Letters, 276, https://doi.org/10.1016/j.matlet.2020.128283
DOI https://doi.org/10.1016/j.matlet.2020.128283
Keywords Mechanical Engineering; General Materials Science; Mechanics of Materials; Condensed Matter Physics
Publisher URL https://www.sciencedirect.com/science/article/pii/S0167577X20309885?via%3Dihub
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