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Title:: Research Progress on Insulation Performance of Thermal Barrier Coatings on Turbine Blade

Author(s):: ZHOU Yichun1; YANG Li1; 2; LIU Zhiyuan1 ; ZHU Wang1; (1. School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China) (2. School of Advanced Materials and Nanotechnology, Xidian University, Xian 710126, China)

Keywords:: turbine blade; thermal barrier coatings; thermal insulation performance; test devices; temperature measuring techniques

Abstract:: With the development of aeroengines, thermal barrier coating (TBC) has become one of the key technologies for future high performance aero-engine turbine blade. Evaluation and prediction of thermal insulation performance are the key problems for TBC optimization design of turbine blade and performance improvement of aero-engine. In this paper, the theory analysis methods, testing devices and temperature measuring techniques for TBC thermal insulation performance in recent years are reviewed, and the effects of material parameters, service environment and structure of turbine blade on TBC thermal insulation performance are introduced. Finally, the research development trend and challenges of TBC thermal insulation performance on turbine blades are prospected. There are many factors affecting the thermal insulation effectiveness of TBC from service environment and structure of turbine blade aspects, and the current experimental research is not sufficient. The development trends of the thermal insulation effectiveness of TBC contain: (i) improving evaluation theory of interaction between TBC and film cooling and testing method for reliability of TBC in service; (ii) developing the technology for measuring the surface and interface temperature of TBC in the service condition; (iii) investigating these influence of parameters about gas and coolant on thermal insulation effectiveness and reliability of TBC under high speed rotation.