No abstract

A progressive study of the three-dimensional deformation field within a γ/γ' thermal barrier coating following cyclic oxidation at 1200°C is presented, observed using synchrotron X-ray micro-computed tomography and analysed by Digital Volume Correlation. Oxide thickening and bondcoat creep displacements are quantified as a function of exposure time at temperature. Linear gradients of these displacements are measured both in-plane and normal to the oxide layer. The first thermal cycle shows the most displacement changes; destructive sectioning confirms the DVC-calculated displacement magnitudes.