Effect of TiAl3 Content on Thermal Shock Resistance of Bionic Self-healing Thermal Barrier Coatings  

作　　者：Panpan Zhang Yujia Guo Zhihui Zhang Xiaofeng Zhang Qunli Zhang Jianhua Yao 

机构地区：[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

出　　处：《Journal of Bionic Engineering》2022年第1期126-138,共13页仿生工程学报（英文版）

基　　金：supported by National Natural Science Foundation of China(Grant No.52105311);Natural Science Foundation of Zhejiang Province(Grant No.LQ21E010002);Fundamental Research Funds for the Provincial Universities of Zhejiang(Grant No.RF-A2020009).

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 different 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 effect 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 first 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.

关 键 词：Thermal barrier coating LASER Bionic self-healing Thermal shock resistance 

分 类 号：Q811[生物学—生物工程] TQ63[化学工程—精细化工]