Journal of Bionic Engineering ›› 2022, Vol. 19 ›› Issue (1): 126-138.doi: 10.1007/s42235-021-00108-6
• • 上一篇
Effect of TiAl3 Content on Thermal Shock Resistance of Bionic Self‑healing Thermal Barrier Coatings
Panpan Zhang1,2, Yujia Guo1,2, Zhihui Zhang3, Xiaofeng Zhang4, Qunli Zhang1,2, Jianhua Yao1,2
- 1 Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou 310023, China 2 Collaborative Innovation Center of High-End Laser Manufacturing Equipment (National “2011 Plan”), Zhejiang University of Technology, Hangzhou 310023, China 3 The Key Laboratory of Bionic Engineering (Ministry of Education China), Jilin University, Changchun 130022, China 4 Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China
Effect of TiAl3 Content on Thermal Shock Resistance of Bionic Self‑healing Thermal Barrier Coatings
Panpan Zhang1,2, Yujia Guo1,2, Zhihui Zhang3, Xiaofeng Zhang4, Qunli Zhang1,2, Jianhua Yao1,2
- 1 Institute of Laser Advanced Manufacturing, Zhejiang University of Technology, Hangzhou 310023, China 2 Collaborative Innovation Center of High-End Laser Manufacturing Equipment (National “2011 Plan”), Zhejiang University of Technology, Hangzhou 310023, China 3 The Key Laboratory of Bionic Engineering (Ministry of Education China), Jilin University, Changchun 130022, China 4 Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China
摘要： Inspired by the self-healing function of biological organisms, Bionic Laser Alloying (BLA) process was adopted to fabricate the bionic self-healing Thermal Barrier Coatings (TBCs). The BLA with diferent fractions of TiAl3 self-healing agent and Ceria and Yttria-Stabilized Zirconia (CYSZ) on the plasma-sprayed 7YSZ TBCs was carried out by a pulsed Nd: YAG laser. The efect of TiAl3 content on the microstructure, phase composition, and thermal shock behaviors of the bionic self-healing TBCs were investigated. Results indicated that the bionic self-healing TBCs had better thermal shock resistance than that of the as-sprayed TBCs. The thermal shock resistance increased frst and then decreased with increasing TiAl3 fraction. The thermal shock resistance of the bionic self-healing TBCs with 15% TiAl3 is triple that of the as-sprayed TBCs. On one hand, the columnar crystals and vertical cracks could improve strain compatibility of TBCs during the thermal shock process; on the other hand, the TiAl3 as a self-healing agent reacted with oxygen in air at high temperature to seal the microcracks, thereby delaying the crack connection.