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Effects of CeO2 on the microstructure and tribological properties of atmospheric plasma-sprayed Cr2O3-TiO2 coatings

Qingjun Ding (State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, China)
Gai Zhao (State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 6 December 2019

Issue publication date: 6 April 2020

143

Abstract

Purpose

The purpose of this paper is to study the mechanism and effect of rare earth oxides on the properties of Cr2O3-TiO2 coating.

Design/methodology/approach

Cr2O3-TiO2 coatings with different proportion of CeO2 were deposited by atmospheric plasma spraying on aluminum alloy 7005. The mechanical, microstructure and tribological properties were studied.

Findings

The addition of CeO2 could improve the micro-hardness; decrease porosity, wear rate and surface roughness of the coating; and increase the bonding strength between the coating and substrate. The wear mechanism is a mixture of abrasive and adhesive wear.

Originality/value

The addition of CeO2 could refine microstructure, and promote the formation of solid solution structure, and then affect the properties of coatings.

Keywords

Citation

Ding, Q. and Zhao, G. (2020), "Effects of CeO2 on the microstructure and tribological properties of atmospheric plasma-sprayed Cr2O3-TiO2 coatings", Industrial Lubrication and Tribology, Vol. 72 No. 3, pp. 341-347. https://doi.org/10.1108/ILT-06-2019-0229

Publisher

:

Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited

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