(1. 北京矿冶研究总院 金属材料研究所, 北京 100044；
2. 中南大学 材料科学与工程学院， 长沙 410083)
摘 要: 以纳米结构氧化钇部分稳定的氧化锆热喷涂粉末为原料， 采用大气热等离子体喷涂法制备了纳米结构热障涂层。 利用扫描电子显微镜和X射线衍射仪对粉末原料及涂层的微观组织和结构进行分析， 并对涂层的结合强度及热导率进行测定。 结果表明， 纳米结构热障涂层具有优异的性能， 热导率为1.1 W/(m·K)， 界面结合强度为47 MPa。 并分析了涂层纳米结构组织对涂层性能的影响， 明确了优化涂层微观组织结构和提高涂层性能的具体方法。
关键字: 纳米结构热障涂层； 等离子体喷涂； 氧化钇部分稳定氧化锆
nanostructured TBCs fabricated by
plasma spraying
（ 1. Sub-institute of Metal Materials, Beijing General Research Institute of
Mining and Metallurgy, Beijing 100044, China;
2. School of Materials Science and Engineering, Central South University, Changsha 410083, China）
Abstract: The nanostructured thermal barrier coatings (TBCs) were fabricated by atmospheric plasma spraying (APS) with nanostructured yttrium partially stabilized zirconia (YPSZ) powder feedstocks. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were applied to analyze the microstructures and phase compositions of the nanostructured powder feedstocks and coating. The results show that the thermal conductivity of the TBCs is 1.1 W/(m·K) and the bonding strength of the TBCs is 47 MPa. The model of the bonding strength and thermal conductivity of the nanostructured TBCs was presented. The relation between microstructures and properties of the nanostructured TBCs was discussed. And finally, the way of optimizing microstructure and increasing properties of nanostructure TBCs was defined.
Key words: nanostructured thermal barrier coatings; plasma spraying; yttrium partially stabilized zirconia
