Effect of rare earth elements on coatings developed by thermal spraying processes (TSP) – A brief review

Abstract

A coating is deployed on the substrate by different deposition techniques to elevate the substrate's surface properties, such as chemical, mechanical, and tribological. The elevation in the properties of the substrate depends on elements used in coating powder. In this work, the effect and significance of rare earth elements on the substrate has been presented. The objective of the work is coating by different thermal spraying methods. From the literature survey on TSP, there is a significant increase in corrosion resistance than other material properties. The tribological properties of substrate material were analysed with and without the rare earth material in coating powder by various researcher’s work. It is found that very less or little researchers have explored rare earth material as a coating material. There are different areas in which these coatings are used for various applications like the turbine's blade, aero-engines, miniaturized electronics, display panels, and others. By using RE metals mechanical, physical, tribological, and thermal shock resistance of the substrate material increased considerably.