Femtosecond laser polishing yttria-stabilized zirconia coatings for improving molten salts corrosion resistance

被引：47
作者：
Fan, Zhengjie [1 ,2 ]
Sun, Xiaomao [1 ]
Zhuo, Xueshi [3 ]
Mei, Xuesong [1 ]
Cui, Jianlei [1 ]
Duan, Wenqiang [1 ]
Wang, Wenjun [1 ]
Zhang, Xiaofeng [3 ]
Yang, Lu [2 ]
机构：
[1] Xi Jiaotong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
[2] City Univ Hong Kong, Dept Mech Engn, Kong Kowloon, Hong Kong 999077, Peoples R China
[3] Guangdong Inst New Mat, Guangzhou 510650, Peoples R China
来源：
CORROSION SCIENCE | 2021年 / 184卷
基金：
中国国家自然科学基金;
关键词：
Ceramic; Thermal barrier coatings; Molten salts; High-temperature corrosion; Laser polishing;
D O I：
10.1016/j.corsci.2021.109367
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, we present a novel method of polishing thermal barrier coatings? surface using high-frequency femtosecond laser. Compared to the conventional mechanical micro-grinding, light trapping due to multiple reflection from porous-structure, which enhances its coupling into coating, resulted in desired effect of healing of the voids in performing a layer-by-layer laser ablation. Herein, the corrosion resistances of these coatings subjected to Na2SO4+V2O5 at 1000 degrees C was investigated. Three observed transport behaviors: (i) molten salts infiltration, (ii) Y-leaching, and (iii) V-in-diffusion, are discussed to illustrate corrosion mechanisms. Laser-polished coatings with smooth surface and healed voids show superior molten salts resistance and significantly alleviate leaching or in-diffusion of elements.
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收藏
页数：15
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