Immersion ultrasonic testing of surface cracks on thermal barrier coatings

被引：0

作者：

Zhang J. ^{[1
]}

Xiao J. ^{[1
]}

Gao S. ^{[1
]}

Li Y. ^{[1
]}

Tang W. ^{[1
]}

Nan Q. ^{[1
]}

机构：

[1] Gas Turbine Department, Xi'an Thermal Power Research Institute Company Limited, Xi'an

来源：

Hangkong Dongli Xuebao/Journal of Aerospace Power | 2019年 / 34卷 / 06期

关键词：

C scan; Echo path difference; Immersion ultrasonic testing; Surface crack; Thermal barrier coatings(TBCs);

D O I：

10.13224/j.cnki.jasp.2019.06.005

中图分类号：

学科分类号：

摘要：

In order to effectively detect the surface cracks on thermal barrier coatings (TBCs), the applicability of immersion ultrasonic testing method was studied. The TBCs samples were fabricated by the air plasma spray (APS), which was most commonly used in the TBCs process. The surface cracks with different depth, width and length were characterized by echo path difference and C scan image. Results indicated that the substrate materials had no obvious influence on the immersion ultrasonic testing results. By optimizing the detection parameters and selecting the instruments and probes properly, the surface crack with the depth of 0.1mm and the length of 2mm can be detected effectively by the immersion ultrasonic testing method. The length and depth of the surface cracks on TBCs can also be achieved by immersion ultrasonic testing method, make it an effective way to solve the TBCs surface cracks detection problem. © 2019, Editorial Department of Journal of Aerospace Power. All right reserved.

引用

页码：1217 / 1224

页数：7

共 24 条

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