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A new spallation mechanism of thermal barrier coatings on aero-engine turbine blades

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posted on 11.01.2018 by Bo Yuan, Christopher Harvey, Rachel Thomson, Gary Critchlow, Simon Wang
Laboratory experiments were conducted to study the spallation behaviour of thermal barrier coatings (TBCs) on aero-engine turbine blades manufactured by the electron-beam physical vapour deposition technique (EB-PVD). Intact blades were heated at temperature 1135°C in a furnace for certain time and then cooled to the room temperature in the laboratory condition. It was found that no spallation occurred during cooling, but spallation happened at constant room temperature after cooling. The spallation mechanism is studied by using the mechanical model developed by Wang, Harvey et al. (2017a, 2017b), which are based on the hypothesis of pockets of energy concentration (PECs). Some observations of the spallation behaviour are well predicted by the model.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Materials

Published in

Theoretical and Applied Mechanics Letters

Citation

YUAN, B. ... et al, 2018. A new spallation mechanism of thermal barrier coatings on aero-engine turbine blades. Theoretical and Applied Mechanics Letters, 8 (1), pp.7-11.

Publisher

Elsevier on behalf of The Chinese Society of Theoretical and Applied Mechanics © The Authors

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

08/01/2018

Publication date

2018

Notes

This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (CC BY-NC-ND 4.0). Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/.

ISSN

2095-0349

Language

en

Exports