Harvey_On spallation of EB-PVD thermal barrier coatings on turbine blades (1).pdf (189.66 kB)
On spallation of EB-PVD thermal barrier coatings on turbine blades
conference contributionposted on 2018-06-28, 10:52 authored by Christopher HarveyChristopher Harvey, Simon WangSimon Wang, Bo Yuan, Rachel ThomsonRachel Thomson, Gary Critchlow
Room temperature blistering and spallation failures reduce the life time of thermal barrier coatings (TBC). Based on the theory of pockets of energy concentration, a mechanical model for the multilayer circular blister is presented, considering the variable material properties through the coating thickness. Con-ditions are revealed analytically for nucleation, propagation and the spallation of TBC blisters. The predictions from the mechanical model on radii for TBC blister unstable growth and spallation are in good agreement with experimental results. Furthermore, this model is beneficial to determine the interface fracture tough-ness and the residual stress in the coating system.
- Aeronautical, Automotive, Chemical and Materials Engineering
Published inICTAEM 2018: International Conference on Theoretical, Applied and Experimental Mechanics Proceedings of The 2nd International Symposium on Advanced Materials and Engineering Applications
Pages1 - 5
CitationHARVEY, C.M. ...et al., 2018. On spallation of EB-PVD thermal barrier coatings on turbine blades. IN: Proceedings of The 2nd International Symposium on Advanced Materials and Engineering Applications [International Conference on Theoretical, Applied and Experimental Mechanics 2018], Paphos, Cyprus, June 17-20th, pp. 1-5.
PublisherHebei University of Engineering and Loughborough University
- VoR (Version of Record)
Publisher statementThis 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/
NotesThis is a conference paper.