横向梯度温度场下热障涂层的失效分析

中国腐蚀与防护学报

2013, Vol. 33

Issue (5): 400-406

研究报告

本期目录 | 过刊浏览

横向梯度温度场下热障涂层的失效分析

陈琛^1,2, 郭洪波², 宫声凯²

1. 中航商用航空发动机有限责任公司上海 200241;
2. 北京航空航天大学材料科学与工程学院北京 100083

Failure Analysis of Thermal Barrier Coating Being Subjected to Lateral Thermal Gradient on Surface

CHEN Chen^1,2, GUO Hongbo², GONG Shengkai²

1. AVIC Commercial Aircraft Engine Co. Ltd., Shanghai 200241, China;
2. School of Material Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

全文: PDF(1072 KB)

摘要: 采用热障涂层服役环境性能实验模拟器，利用电化学阻抗谱针对横向梯度温度场条件下的热障涂层结构变化开展研究，并结合有限元方法对热力耦合作用下热障涂层的失效机理进行了分析，发现当管状试样处于两端约束受力状态下，加热区边缘为涂层易发生开裂部位。

关键词 ：热障涂层, 温度梯度, 失效模式, 电化学阻抗, 有限元

Abstract：Due to the combustion chamber usually provide flam with a non-uniform temperature field, therefore, a lateral temperature gradient should exist on the surface of nozzle guide-vanes for a gas turbine. In the present article, the structure evolution of thermal barrier coatings on nozzle guide-vanes was examined under the action of the above mentioned lateral temperature gradient by means of a home madeinfrared thermal shock testing system combined with impedance spectroscopy measurement. Meanwhile, the failure analysis of thermal barrier coatings being subjected to thermo-mechanical loading was also studied using finite element analysis. It's found that with constrain at both ends of a tube, cracks are apt to initiate at the edge of a heated area.

Key words： thermal barrier coating temperature gradient failure analysis electrochemical
impedance spectroscopy finite element

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引用本文:

陈琛, 郭洪波, 宫声凯. 横向梯度温度场下热障涂层的失效分析[J]. 中国腐蚀与防护学报, 2013, 33(5): 400-406.
CHEN Chen, GUO Hongbo, GONG Shengkai. Failure Analysis of Thermal Barrier Coating Being Subjected to Lateral Thermal Gradient on Surface. Journal of Chinese Society for Corrosion and protection, 2013, 33(5): 400-406.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I5/400

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