液态喷涂高温可磨耗封严涂层成形机理及服役行为

高温可磨耗封严涂层是先进航空发动机和燃气轮机的关键核心技术，能够有效减少气体泄漏，提高发动机的效率。传统的陶瓷基可磨耗封严涂层硬度高，可磨耗性差，本项目提出一种新型的液态前驱体-悬浮液等离子喷涂技术，通过多尺度结构设计、制备过程强化及组织结构调控，制备氧化锆增强氧化锆的复相陶瓷涂层，有效协调可磨耗性与抗冲蚀等性能之间的矛盾。通过涂层成形机理、服役行为及失效规律的系统研究，揭示元素扩散、氧化、腐蚀、应力等破坏涂层物理化学相容性的作用机制，建立涂层成分-结构-服役行为-失效机理之间的构效关系，提出涂层性能优化策略，为高温可磨耗封严涂层的开发与应用提供技术支撑。

The high-temperature abradable coating is the key technology of the aero engine and gas turbine. It can reduce the gas leak and increase the efficiency of the equipment. The conventional ceramic coating is limited by its high hardness and poor abradability. A new preparation method of solution-suspension plasma spray technology is proposed in the paper. The YSZ strengthened YSZ coating is manufactured by the multiscale design, process intensification and structure tailoring. It can reconcile the contradictions between the abradability and erosion resistance. The structure activity relationships can be built through the systematic study of formation process, service properties, interfacial compatibility and failure mechanism. New design guideline is built up to support the development of the high-temperature abradable coating.