Performance of Dy2Zr2O7 Thermal Barrier Coating in Thermal-Shock Test

被引：1

作者：

Cao Xuan ^{[1
]}

Ma Zhuang ^{[1
]}

Liu Yanbo ^{[1
]}

Du Zhong ^{[1
]}

Zheng Kangnan ^{[1
]}

机构：

[1] Beijing Inst Technol, Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2013年 / 42卷 / 06期

关键词：

Dy2Zr2O7; thermal-shock resistance; APS; thermal barrier coating; EVOLUTION; FAILURE;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new thermal barrier coating system based on Dy2Zr2O7, which had a lower thermal conductivity and closer thermal expansion coefficient to nickel-based superalloys, was prepared by the air plasma spraying (APS). The microstructure, phase composition and thermal-shock resistance of the as-sprayed coatings were studied. Besides, the failure process of the coating during thermal cycles was also discussed. After 6 similar to 8 thermal-shock cycles, coatings spalled from the specimens. Micro cracks in the top coat grew and crushed the ceramic top coat in the vicinity of bond coat interface into pieces, and then led to the spallation of the top coat.

引用

页码：1134 / 1138

页数：5

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