中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 34 No. 7 July 2024 |
（1. Department of Applied Chemistry, Xi’an University of Technology, Xi’an 710048, China;
2. National Engineering Laboratory of Modern Materials Surface Engineering Technology & Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China;
3. Guangdong Key Laboratory for Advanced Metallic Materials Fabrication and Forming, National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China）
Abstract:Particle erosion induced by foreign object damage (FOD) is an important factor that restricts the working life of thermal barrier coatings (TBCs). A dense α-Al2O3 overlay was prepared by magnetron sputtering and vacuum treatment on the surface of 7YSZ TBCs sprayed by plasma spray-physical vapor deposition (PS-PVD) to improve the erosion resistance of the TBCs. The FOD behavior of the TBCs was systematically studied and the interface of α-Al2O3/c-ZrO2 was investigated by first principles calculations. The experimental results show that the erosion rates of the PS-PVD, atmospheric plasma spraying (APS), and electron beam-physical vapor deposition (EB-PVD) TBCs were 324, 248, and 139 μg/g, respectively, while the erosion rate of the Al2O3-modified PS-PVD TBCs was reduced to 199 μg/g. In addition, the highest interface adhesive energy of 3.88 J/m2 observed in the top configuration model of Al2O3/ZrO2-O is much higher than that of ZrO2/Ni (2.011 J/m2), which results in improved interface bonding performance.
Key words: thermal barrier coatings; plasma spray-physical vapor deposition; Al2O3-modification; foreign object damage; first principles
