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

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

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.

Citation

Venturi, F., Pulsford, J., & Hussain, T. (2020). A novel approach to incorporate graphene nanoplatelets to Cr2O3 for low-wear coatings. Materials Letters, 276, Article 128283. https://doi.org/10.1016/j.matlet.2020.128283

• Journal Article Type: Article
• Acceptance Date: Jul 4, 2020
• Online Publication Date: Jul 6, 2020
• Publication Date: Oct 1, 2020
• Deposit Date: Jul 20, 2020
• Publicly Available Date: Jul 7, 2021
• Journal: Materials Letters
• Print ISSN: 0167-577X
• Electronic ISSN: 1873-4979
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 276
• Article Number: 128283
• DOI: https://doi.org/10.1016/j.matlet.2020.128283
• Keywords: Mechanical Engineering; General Materials Science; Mechanics of Materials; Condensed Matter Physics
• Public URL: https://nottingham-repository.worktribe.com/output/4778659
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0167577X20309885?via%3Dihub