Preparation and Properties of Core-Shell Structure/Ni60 Coating

Wang Xinsheng,Kun Liu,Yanpei Liu,Junjian Hou,She Zhaobin,Wenbin He,Guo-Qing Zhang

doi:10.1155/2021/2557539

Abstract

As the most important element in improving the service life of a mechanical system, surface coating materials are of key importance in the development of high-end equipment. To improve the comprehensive properties of the surface coating, the common core-shell structure/Ni60 coating was prepared on the surface of #45 steel by supersonic plasma spraying. The results show that the Ni60 has no layer structure, pores, cracks, and other defects on the surface of the coating. The nanohardness of the NNA(Ni60/Ni (Al) mixture powder), NNM(Ni60/Ni (MoS2) mixture powder), and NNC(Ni60/Ni (C) mixture powder) coatings is 6815 μN, 5750 μN, and 2000 μN. The results show that the wear resistance of the NNA coating is better. In the friction and wear test, the NNA coating mainly shows adhesive wear and abrasive wear, while the NNM and NNC coatings mainly show abrasive wear.

Highlights

Supersonic plasma technology uses a plasma arc as the heat source to heat the working gas to form a hightemperature and high-speed plasma jet; the plasma spray coatings present better corrosion and wear resistance compared with the flame and arc spray coatings [1]. is is used to heat, accelerate, and form a molten particle flow that accelerates to form high-speed droplets and impacts the substrate before being flattened into a coating
Conventional composite powders are mixed mechanically; it is difficult to achieve uniform mixing and to avoid segregation of the components, which could significantly affect the performance of the coating [6]. e core-shell composite powder is a new type of composite material developed in recent years and is composed of the core particles and the coating layer
The different phases in the core-shell structure composite powder can achieve a uniform degree of mixing of the components at the particle level, which overcomes the disadvantages of conventional mixed composite powders, such as the composition segregation and uneven mixing

Summary

Introduction

Supersonic plasma technology uses a plasma arc as the heat source to heat the working gas to form a hightemperature and high-speed plasma jet; the plasma spray coatings present better corrosion and wear resistance compared with the flame and arc spray coatings [1]. is is used to heat, accelerate, and form a molten particle flow that accelerates (or accelerate after atomization) to form high-speed droplets and impacts the substrate before being flattened into a coating. Conventional composite powders are mixed mechanically; it is difficult to achieve uniform mixing and to avoid segregation of the components, which could significantly affect the performance of the coating [6]. The different phases in the core-shell structure composite powder can achieve a uniform degree of mixing of the components at the particle level, which overcomes the disadvantages of conventional mixed composite powders, such as the composition segregation and uneven mixing. It has the favorable properties of both shell and core materials, the core-shell structure can prepare the coating with good bonding, no obvious cracks and pores, uniform distribution, and wear-resistant performance, and the bonding force between the coating and the substrate will improve the quality and service time of the coating, which can endow the powder with a favorable property profile [7,8,9,10]. (b) transition layer is realized by adding core-shell structure materials [11]. e core-shell materials are Ni (Al), Ni (MoS2), and Ni (C). e comparative verification of the preparation process and performance of the coating is explored

Experimental Method

Experimental Results and Discussion

Conclusion