Etude par microscopie electronique en transmission de films minces d'oxyde obtenus par oxydation d'alliages de zirconium a teneur en element d'addition inferieure a 4% en poids

The measurement of stress and phase fraction distributions in pre and post-transition Zircaloy oxides using nano-beam synchrotron X-ray diffraction

“…Arashi et al [54], however, find the tetragonal phase to be stable only above ~430°C. Other factors such as small grain size [9,55] and the presence of alloying elements such as iron and tin [56,57,58] also affect the stability of the tetragonal phase.…”

Oxidation of the hexagonal Zr(Cr0.4Fe0.6)2 Laves phase

“…Seeing that the M€ ossbauer probe used in this work is Fe, there is no Cr M€ ossbauer effect, thus this technique cannot confirm this hypothesis. Nevertheless it could be assumed that chromium is oxidized into fine Cr 2 O 3 since the formation of Cr 2 O 3 upon the oxidation of ZrCr 2 precipitates in a zirconium matrix has already been reported [27].…”