Study on the Laser Modification of Plasma Sprayed Thermal Barrier Coatings to Create a Peg-nail Structure

被引：0
作者：
Tong, X. [1 ]
Zhou, K. S. [1 ,2 ]
Chang, F. [1 ,2 ]
Liu, M. [1 ]
机构：
[1] Guangdong Gen Res Inst Ind Technol, Guangzhou Res Inst Nonferrous Met, Dept New Mat, Guangzhou 510650, Guangdong, Peoples R China
[2] S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China
来源：
LASERS IN ENGINEERING | 2015年 / 30卷 / 1-2期
关键词：
Nd:YAG laser laser modification; plasma spray; thermal barrier coating (TBC); peg-nail structure; bonding strength; MICROSTRUCTURE; OXIDATION;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study an innovative peg-nail structured laser modification was carried out on thermal barrier coatings (TBCs) which were fabricated by a NiCoCrAlYTa bond coat and a YSZ top coat sprayed by air plasma spraying (APS). Results indicate that the laser modified surface has significantly improved roughness compared with as-sprayed coatings especially using the multi-pulsed laser beam. The laser modified YSZ region consists of a fully dense columnar microstructure. Due to the peg-nail structured laser modification which penetrated the whole top coat and partial bond coat, the average bonding strength of as-sprayed TBCs was improved from 37 to 52 MPa.
引用
收藏
页码：129 / 136
页数：8
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