Spallation Behavior of Thermally Grown Oxide Ceramic Film under Compressive Stresses

Qi Yuhong , Philippe Lours (1) , Yannick Le Maoult (1) , Zhang Zongbao

1 ICA - Institut Clément Ader

Spallation behaviors of thermally grown oxide ceramic films for PM2000 Fe-Cr-Al alloy under compressive stresses were studied by surface impression method and CCD monitoring technique. The results show that the film adhesion can be qualitatively understood by testing crack region area or crack width around impression induced from surface impression technique, that is, the larger the crack region area or the wider the crack, the poorer the film adhesion; oxide film initial spallation temperature and the spalled regions morphology, site and area fraction can be obtained by monitoring continuously the film surface morphology using CCD camera during cooling from high temperature to ambient temperature which provide much useful information for understanding the spallation mechanism of thermally grown oxide ceramic film.

Mots clés: CCD monitoring technique; surface impression technique; spallation; thermally grown oxide ceramic film

Domaines: Sciences de l'ingénieur [physics]

Qi Yuhong, Philippe Lours, Yannick Le Maoult, Zhang Zongbao. Spallation Behavior of Thermally Grown Oxide Ceramic Film under Compressive Stresses. Rare Metal Materials and Engineering, 2009, 38 (2), pp.1150-1153. ⟨hal-01709499⟩