Rare-earth Element doped YSZ/YSZ Multilayer Thermal Barrier Coating with High Infrared Reflectivity

Journal of Aeronautical Materials

WANG Yufeng¹  YANG Wei² 

[1] AECC Xi’an Aero-Engine Co., LTD., Xi’an 710021, China;Naval Equipment Department, Xi’an 710021, China;

关键词: Thermal barrier coating;    electron beam-physical vapor deposition(EB-DVD);    thermal barrier effect;    rare earth element;   

DOI  :  10.11868/j.issn.1005-5053.2016.000233

来源: DOAJ

【 摘 要 】

The operating temperature of advanced aeroturbine engine increases rapidly for higher working efficiency. Thermal barrier coatings (TBCs) with high temperature capability and thermal insulation effect are required. In this work, a novel multilayer TBCs consisting of rare-earth element doped YSZ and YSZ sublayers were designed and fabricated. The influence of microstructure to the phase structure, thermal conductivity and infrared reflectivity of the coatings were investigated. The results show that a preferred orientation of (200) is yielded in the coating. With the increase of layers, the thermal conductivity of the coating decreases and the infrared reflectivity increases respectively. The multilayer coating with 200 sublayers exhibits a thermal conductivity of 1.1-1.16 W/m·K, 11% lower than that of the conventional single layer coating. The infrared reflectivity of the coating reaches as high as 48%-55%.

【 授权许可】

Unknown