感应等离子体球化热喷涂粉体材料研究进展  

Research Progress in Inductive Plasma Spheroidized Powder Materials for Thermal Spraying

作　　者：赵阳[1] 朱锦鹏 郝振华[1] 舒永春 杨凯军[2] 何季麟 ZHAO Yang;ZHU Jin-peng;HAO Zhen-hua;SHU Yong-chun;YANG Kai-jun;HE Ji-lin(Henan Province Industrial Technology Research Institute of Resources and Materials,Zhengzhou University,Zhengzhou 450001,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学河南省资源与材料工业技术研究院,郑州450001 [2]郑州大学材料科学与工程学院,郑州450001

出　　处：《表面技术》2020年第5期81-90,共10页Surface Technology

基　　金：郑州大学科研启动经费(32211157);中国博士后面上基金(2019M652569)。

摘　　要：介绍了传统非等离子体法制备球形粉体方法--雾化法和喷雾造粒法,分析了其在热喷涂球形粉体制备过程中存在的优势和局限性。综述了等离子球化技术在热喷涂粉体材料领域中的应用现状,并深入讨论了感应等离子体球化过程中不同的工艺条件对粉体球化率和形貌的影响:原料粉体状态决定了球化后粉体的平均粒径,降低粉体原始粒径可以提高熔融程度,粒径分布较窄的原始粉体有利于得到高球形度粉体;适当增大输入功率和工作气体流量,可降低细小颗粒的粘附现象;工作气体的种类会影响等离子焰炬的热焓值;送粉速率需要结合粉体性质择优选取。这些关键影响因素对热喷涂粉体性能的调控机制,以及深入认识等离子体作用条件下的热喷涂粉体球化机理,提供了有力的理论支撑。总结和展望了感应等离子球化技术在热喷涂陶瓷粉体材料制备中存在的问题和发展方向,感应等离子体球化技术作为制备高纯度、无污染热喷涂球形粉体材料的一种新技术,具有广阔的应用前景。The paper introduced the traditional method for preparation of spherical powder-atomization and spray granulation method, and analyzed the advantages and limitations in thermal spraying during the preparation of spherical powder with the method above. The current application of plasma spheroidizing technology in thermal spraying powder materials was reviewed and the influences of different process conditions in inductive plasma spheroidizing on the powder spheroidization rate and surface morphology were discussed: the state of raw material powder determined the average particle size of the powder after spheroidizing, and reducing the original particle size of powder can improve the molten. Narrow particle size distribution of raw powder was helpful to get powder of degree. Increasing the input power and working gas flow properly can reduce the adhesion of fine particles. The type of working gas affected the enthalpy of plasma torch. The powder feeding rate should be selected according to the powder properties. These key factors provided powerful theoretical support for the regulation mechanism of the properties of thermal spray powder and further understanding the spheroidization mechanism of thermal spray powder with the action of plasma. The problems and development direction of inductive plasma spheroidization in preparation of thermal spraying ceramic powders were summarized and prospected. As a new technique for preparing spherical powder materials with high purity and without pollution, inductive plasma spheroidization has a board prospect of application.

关 键 词：陶瓷涂层粉体 感应等离子技术 球化工艺 热喷涂 

分 类 号：TG174.4[金属学及工艺—金属表面处理]