为使高温磨蚀等苛刻使用条件下零部件持久稳定工作，减少维修及停工损耗，节约能源和减少材料消耗，本项目采用双极耦合快凝低真空雾化法制备NiCoWRE合金粉末；通过等离子喷涂方法制备高温耐磨涂层，借助XRD、SEM、EPMA、FEGSEM、EDS、XPS和DTA等分析手段深入研究氧化铈影响粉未成形的作用机理，揭示氧化铈脱氧、孕育和改变合金粘度的机理；分析喷熔层的微观组织、相结构及喷熔层与基体界面附近的组织特征，并对涂层硬度、耐高温磨蚀性能进行研究，探索氧化铈对涂层合金成分、组织结构和性能的作用机制。揭示氧化铈在涂层高温摩擦过程中的化学状态，以及氧化铈作为高温润滑剂的润滑机理，以期提高氧化铈在合金中的残余量，增强材料的抗高温磨蚀能力，该合金粉末可应用于内燃机气门等高温磨蚀苛刻环境下的零部件表面，为开发新型抗高温磨蚀表面涂覆合金等材料奠定理论基础，对充分发挥氧化铈在高温摩擦学研究中的作用有重要意义。

The study that follows is an attempt to form a protective coating on components whose surface is submitted to severe conditions at high temperature to obtain wear and corrosion resistance and full benefits of the properties of coatings. In this work, a set of NiCoWRE alloy powders will be produced by bipolar coupler rapid solidified gas atomization in low vacuum condition. NiCoWRE alloy coatings will be produced by plasma spraying. The microstructure, phase structure of the NiCoWRE alloy coatings were investigated with a XRD, SEM, EPMA, FEGSEM, EDS, XPS and DTA. This project also studies the active mechanism of CeO2 on powder forming, microstructure, chemical component and properties of alloy coatings. In addition, effects of CeO2 on the mechanical properties, friction and wear characteristics will be studied by the way of examining and evaluating in hardness, wear resistance and corrosion resistance. The aim of this study is mainly focused on relationship between the structure and properties of the coatings by adding CeO2, the mechanism of high temperature lubricating coating is also investigated. Expectively, the advantage of the improved alloy system is that the service life of materials and parts is extended thus providing economic benefits. Especially the alloy can be applied for parts employed in hostile environments at high temperature such as valves, tools, coal-fired oilers, heat exchangers, turbines, etc.