(1. 西南石油大学 油气藏地质及开发工程国家重点实验室，成都 610500；
2. 中国石油大学(北京) 化学化工学院，北京 102249)
摘 要: 利用自行研制的纳米掺杂AZ−20热喷涂粉末，采用大气等离子喷涂技术，在35号钢基体上制备Al2O3/ZrO2复合材料热障涂层，对涂层的组织结构及性能进行分析。结果表明：制备的涂层是由四方结构的t′-ZrO2与六方结构的α-Al2O3构成的，具有纳米晶与微米晶混晶组织；涂层孔隙率为11.2%，孔隙尺度较均匀；涂层硬度HV100为702，抗磨损能力较常规AZ-20涂层高约25%；涂层具有良好的隔热性能。
关键字: Al2O3/ZrO2；等离子喷涂；热障涂层；隔热性能
nano-doping Al2O3/ZrO2 plasma spray coatings
（1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest
Petroleum University, Chengdu 610500, China;
2. School of Chemistry and Chemical Engineering, Petroleum University of China (Beijing), Beijing 102249, China）
Abstract:The thermal barrier coating of Al2O3/ZrO2 composite coatings on 35# steel substrate were prepared by the air plasma spraying with self-developed AZ−20 nano-doping thermal spray powder. The coating consists of cubic t′-ZrO2 and hexagonal structure α-Al2O3 in nanometer and micrometer; the coating has the uniform porosity of 11.2% and hardness HV100 of 702. Its antiwear ability succeeds that of AZ−20 by about 25%; the coating has good thermal insulation performance.
Key words: Al2O3/ZrO2; plasma spray; thermal barrier coating; thermal insulation performance
