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A new spallation mechanism of thermal barrier coatings on aero-engine turbine blades
journal contribution
posted on 2018-01-11, 11:38 authored by Bo Yuan, Christopher HarveyChristopher Harvey, Rachel ThomsonRachel Thomson, Gary Critchlow, Simon WangSimon WangLaboratory 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 LettersCitation
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 AuthorsVersion
- 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
2018-01-08Publication date
2018Notes
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
2095-0349Publisher version
Language
- en