2134/33597 Christopher Harvey Christopher Harvey Simon Wang Simon Wang Bo Yuan Bo Yuan Rachel Thomson Rachel Thomson Gary Critchlow Gary Critchlow On spallation of EB-PVD thermal barrier coatings on turbine blades Loughborough University 2018 Composite materials Interface fracture Pockets of energy concentration Spallation Thermal barrier coatings Materials Engineering not elsewhere classified 2018-06-28 10:52:47 Conference contribution https://repository.lboro.ac.uk/articles/conference_contribution/On_spallation_of_EB-PVD_thermal_barrier_coatings_on_turbine_blades/9220691 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.