Buckling and spalling failure of alumina grown by oxidation on ODS FeCrAl alloys

Julien Sniezewski (1) , Philippe Lours (1) , Yannick Le Maoult (1)

1 ICA - Institut Clément Ader

In situ investigation of thermal shocks imposed to alumina grown on FeCrAl alloy at high temperature shows that interfacial buckling is the preferential route to spallation. Various parameters, either intrinsic or extrinsic to the substrate/oxide system, are analysed in terms of variation in interfacial fracture energies and propensity of alloy grains to wrinkle during high temperature exposure depending On their crystal orientation.

Mots clés: in situ analysis; oxidation; buckling; spallation

Domaines: Sciences de l'ingénieur [physics]

Julien Sniezewski, Philippe Lours, Yannick Le Maoult. Buckling and spalling failure of alumina grown by oxidation on ODS FeCrAl alloys. Materials at High Temperatures, 2011, 28 (1), pp.17-20. ⟨10.3184/096034011X12962385894289⟩. ⟨hal-01709490⟩