Effect of the microstructure of suspension plasma-sprayed thermal barrier coatings on their thermal cycling damage

被引：5

作者：

Yamazaki, Yasuhiro ^{[1
]}

Shinomiya, Keisuke ^{[2
]}

Hamaguchi, Tatsuya ^{[3
]}

Habu, Yoichiro ^{[4
]}

Takagi, Kaito ^{[4
]}

机构：

[1] Chiba Univ, Grad Sch Engn, 1-33 Yayoi Cho,Inage Ku, Chiba 26838522, Japan

[2] Chiba Univ, Grad Sch Sci & Engn, 1-33 Yayoi Cho,Inage Ku, Chiba 26838522, Japan

[3] TOCALO Co Ltd, Prod Tech Dept, Tokyo Plant, 1-1-1 Gyoda, Funabashi, Japan

[4] TOCALO Co Ltd, R&D Labs, 14-3 Minamifutami,Futami Cho, Akashi, Japan

来源：

SURFACE & COATINGS TECHNOLOGY | 2023年 / 456卷

基金：

日本学术振兴会;

关键词：

Thermal barrier coatings; Suspension plasma spray; Columnar microstructure; Thermal cycle fatigue; Delamination life; COLUMNAR MICROSTRUCTURE; STRENGTH;

D O I：

10.1016/j.surfcoat.2023.129269

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The suspension plasma spray (SPS) technique has recently attracted attention due to the variety of microstructures achievable using submicron spray particles mixed with a solvent to form a suspension. Thermal barrier coatings (TBCs) with a columnar microstructure can be obtained using SPS. Because of its unique columnar microstructure achieving high strain tolerance, a top coat sprayed using this technique can efficiently suppress thermal cycling damage in SPS-TBCs. However, there are few reports on the effect of microstructure on the damage behavior of SPS-TBCs with a columnar structure. In this study, the effect of the top coat microstructure on the thermal cycling fatigue of SPS-TBCs was investigated. The size of the complex oxide formed on the top coat-bond coat interface and the length of the cracks at the interface (formed as a result of thermal cycling) increase with the column diameter in the top coat of SPS-TBCs. The thermal spray conditions affect the thermal cycling fatigue life of SPS-TBCs. The SPS-TBC with fine columnar structure exhibits superior thermal cycling fatigue life.

引用

页数：7

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