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Journal of Advanced Ceramics

, Volume 6, Issue 3, pp 230–239 | Cite as

Comprehensive damage evaluation of localized spallation of thermal barrier coatings

  • Wei-Wei Zhang
  • Guang-Rong Li
  • Qiang Zhang
  • Guan-Jun YangEmail author
Open Access
Research Article

Abstract

Thermal barrier coatings (TBCs) enable the hot section part to work at high temperatures owing to their thermal barrier effect on the base metal components. However, localized spallation in the ceramic top-coat might occur after long duration of thermal exposure or thermal cycling. To comprehensively understand the damage of the top-coat on the overall hot section part, effects of diameter and tilt angle of the spallation on the temperature redistribution of the substrate and the top-coat were investigated. The results show that the spallation diameter and tilt angle both have a significant effect on the temperature redistribution of the top-coat and the substrate. In the case of the substrate, the maximum temperature increment is located at the spallation center. Meanwhile, the surface (depth) maximum temperature increment, having nothing to do with the tilt angle, increases with the increase of the spallation diameter. In contrast, in the case of the top-coat, the maximum temperature increment was located at the sharp corner of the spallation area, and the surface (depth) maximum temperature increment increases with the increase of both the spallation diameter and the tilt angle. Based on the temperature redistribution of the substrate and the top-coat affected by the partial spallation, it is possible to evaluate the damage effect of spalled areas on the thermal capability of TBCs.

Keywords

thermal barrier coatings (TBCs) thermal property localized spallation damage evaluation 

Notes

Acknowledgements

This work is supported by the National Basic Research Program of China (No. 2013CB035701), the National Natural Science Foundation of China (Grant No. 51671159), the Fundamental Research Funds for the Central Universities, and the National Program for Support of Top-notch Young Professionals.

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© The Author(s) 2017

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Wei-Wei Zhang
    • 1
    • 2
    • 3
  • Guang-Rong Li
    • 1
  • Qiang Zhang
    • 1
    • 4
  • Guan-Jun Yang
    • 1
    Email author
  1. 1.State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’anChina
  2. 2.Institute of Publication ScienceChang’an UniversityXi’anChina
  3. 3.School of Materials Science and EngineeringChang’an UniversityXi’anChina
  4. 4.AECC Beijing Institute of Aeronautical MaterialBeijingChina

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