Spallation process of thermally grown oxides by in-situ CCD monitoring technique

  • Yu-hong QiEmail author
  • Philippe Lours
  • Yannick Le Maoult


In cooling process of Fe-Cr-Al alloy oxidized at 1300 °C, the effect of cooling speed and exposure time on oxide spalled area fraction and successive variety of the spalled region were studied by investigating evolvement of the thermally grown oxide using in-situ CCD monitoring technique. The results showed that oxide spallation can be restrained by controlling cooling speed and the critical temperature drop of spallation initiation which is closely related to the oxide thickness or exposure time, and the spallation process of a little region may be described in more detail as two routes: from the oxide/substrate interface micro-decohesion, micro-buckles, buckle spreading, buckle crack to spallation and from the interface micro-decohesion. micro-buckles, buckle crack and spallation to the residual oxide decohesion and spallation.

Key words

in-situ CCD monitoring technique spallation thermally grown oxides Fe-Cr-Al 


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Copyright information

© China Iron and Steel Research Institute Group 2009

Authors and Affiliations

  1. 1.Materials Science and Engineering DepartmentDalian Maritime UniversityDalian, LiaoningChina
  2. 2.Research Centre on ToolsMaterials and Processes, Ecole des MinesAlbiFrance

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