从导致涂层粉化失效的环境腐蚀因素出发，研究导致涂层粉化的根本原因，构建纳米热障涂层粉化机理模型，为进一步提高纳米热障涂层寿命提供新思路。项目研究目标为La2(Zr0.7Ce0.3)2O7纳米热障涂层，采用水热合成法和溶胶凝胶法制备原材料，通过大气等离子喷涂方法制备涂层。通过将涂层放置于不同腐蚀环境中，研究不同阶段涂层相成分、微观组织结构的变化规律，并评价原材料合成方法和热处理工艺对涂层粉化的影响；通过强制脱落手段研究粉化颗粒的相结构、尺寸、形貌的变化，探索粉化颗粒的晶体生长行为；揭示腐蚀环境-相成分-微观组织结构-粉化之间的关系，构建纳米热障涂层粉化机理模型，并探讨涂层粉化机理与传统热处理失效模式的区别和联系；探索提高涂层抗粉化性能的有效措施。本项目的研究对扩展纳米热障涂层的性能和应用具有重要意义。

Based on the influences of environmental corrosion factors, to build the pulverization failure model of La2(Zr0.7Ce0.3)2O7 nano-structured thermal barrier coatings，and to provide a new idea to improve the performances of thermal barrier coatings. In this project, we plan to employ La2(Zr0.7Ce0.3)2O7 nanoparticles synthesized by hydrothermal method and sol-gel method as raw materials to fabricate nano-structured thermal barrier coatings via atmospheric plasma spraying (APS) on Ni-based superalloy. On the basis of the investigation of the evolvement rules of phase structures and microstructures with different corrosion environments and time, we want to reveal the primary factors of pulverization. Further study the basic reason of pulverization failure for La2(Zr0.7Ce0.3)2O7 nano-structured thermal barrier coatings. The research results of this project have an important scientific significance for improving the performances and promoting the applications of the nano-structured thermal barrier coatings.