Three-dimensional damage evolution measurement in EB-PVD TBCs using synchrotron laminography

Vincent Maurel (1) , Lukas Helfen (2) , Romain Soulignac (3) , Thilo F. Morgeneyer (1) , Alain Köster (1) , Luc Rémy (1)

1 MAT - Centre des Matériaux
2 ESRF - European Synchrotron Radiation Facility
3 SNECMA Villaroche [Moissy-Cramayel]

This study provides the first results of three dimensional microstructural evolution analysis of a typical EB-PVD thermal barrier coating subjected to thermal cycling. Results have been obtained using the technique of synchrotron-radiation computed laminography (SRCL), enabling the scanning of samples that are thin but extended in two dimensions. A correlation with quantitative measurements of phase transformation from β-NiAl to γ'-Ni3Al was achieved from 3D images and 2D cross-section analysis. Morphological features of phase transformation and damaged areas within the bond-coat layer obtained by SRCL are discussed.

Mots clés: EB-PVD; Synchrotron computed laminography; Thermal cycling; 3D morphology of Ni3Al

Domaines: Sciences de l'ingénieur [physics]; Matériaux

Vincent Maurel, Lukas Helfen, Romain Soulignac, Thilo F. Morgeneyer, Alain Köster, et al.. Three-dimensional damage evolution measurement in EB-PVD TBCs using synchrotron laminography. Oxidation of Metals, 2013, 79, pp.313-323. ⟨10.1007/s11085-012-9333-3⟩. ⟨hal-00820124⟩