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Title: A new spallation mechanism of thermal barrier coatings on aero-engine turbine blades
Authors: Yuan, Bo
Harvey, Christopher M.
Thomson, Rachel C.
Critchlow, Gary W.
Wang, Simon
Keywords: Thermal barrier coating
Interface fracture
Pockets of energy concentration
Issue Date: 2018
Publisher: Elsevier on behalf of The Chinese Society of Theoretical and Applied Mechanics © The Authors
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.
Abstract: 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.
Description: 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/.
Version: Published
DOI: 10.1016/j.taml.2018.01.007
URI: https://dspace.lboro.ac.uk/2134/28041
Publisher Link: https://doi.org/10.1016/j.taml.2018.01.007
ISSN: 2095-0349
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)
Published Articles (Materials)

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