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Detection of Debonding Defects in Thermal Barrier Coatings by Long Pulse and Vibro-Thermography

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Intelligent Systems in Production Engineering and Maintenance III (ISPEM 2023)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

Thermal barrier coatings (TBCs) are widely used in turbine blade for protection of superalloy substrate. Interfacial debonding will lead to serious safety accidents of aircrafts and should be detected in advance. Vibrothermography (VT) and long pulse thermography (LPT) are two kinds of effective non-destructive techniques. In this paper, the two methods were used for defect detection in TBCs. Artificial debonding defects with diameter from 5 mm to 2 mm were fabricated. The results show that both VT and LPT can be successfully used to identify defects with diameter larger than 2 mm. The thermal contrast of the two methods reduces with the decreasing size of debonding defect, and there is a higher thermal contrast in VT than that in LPT, when a proper ultrasonic excitation frequency is selected in VT. Measurement accuracy is investigated by comparing the defect area, which shows that the average value of the relative error is reasonable except for defects with small size. The lateral thermal diffusion effect and imperfect manufacturing process of artificial debonding may be the main causes for the relative error. In addition, parameters of each method should be optimized for better defect detection in TBCs.

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Acknowledgements

The authors are grateful for financial support from the National Natural Science Foundation of China (Grant No. 11972014), the Natural Youth Science Foundation of Jiangsu Province (Grant No. BK20210740) and the National Key Laboratory of Science and Technology on Advanced Composites in Special Environments (JCKYS2020603C014).

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Authors and Affiliations

  1. Jiangsu University, Zhenjiang, China

    Chaoyi Li, Lijun Zhuo & Jianguo Zhu

Authors
  1. Chaoyi Li
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  2. Lijun Zhuo
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  3. Jianguo Zhu
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Corresponding author

Correspondence to Jianguo Zhu .

Editor information

Editors and Affiliations

  1. Wrocław University of Science and Technology, Wrocław, Poland

    Anna Burduk

  2. Liverpool John Moores University, Liverpool, UK

    Andre D. L. Batako

  3. University of Minho, Guimarães, Portugal

    José Machado

  4. Silesian University of Technology, Gliwice, Poland

    Ryszrad Wyczółkowski

  5. Poznań University of Technology, Poznan, Poland

    Ewa Dostatni

  6. Kazimierz Wielki University in Bydgoszcz, Bydgoszcz, Poland

    Izabela Rojek

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Li, C., Zhuo, L., Zhu, J. (2024). Detection of Debonding Defects in Thermal Barrier Coatings by Long Pulse and Vibro-Thermography. In: Burduk, A., Batako, A.D.L., Machado, J., Wyczółkowski, R., Dostatni, E., Rojek, I. (eds) Intelligent Systems in Production Engineering and Maintenance III. ISPEM 2023. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-44282-7_12

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  • DOI: https://doi.org/10.1007/978-3-031-44282-7_12

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  • Print ISBN: 978-3-031-44281-0

  • Online ISBN: 978-3-031-44282-7

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