The secondary phase particles Zr(Fe,Cr)2 embaded in the formed oxide scale on the surface of an oxidized zircaloy-4 were characterized by means of TEM and HREM. The Zircaloy-4 has been oxidized in superheated steam vapour at 10. 3 MPa at 400°C for 14 days forming an oxide scale of thickness around 1. 9 μm. The results showed that on the periphery of the particle Zr(Fe,Cr)2 an oxide with the formula of Zr6(Fe,Cr)3O was observed, which showed a coherent relationship with the particle Zr(Fe,Cr)2. Further outward there was a mixture of cubic ZrO2 and metallic phase α-Fe(Cr), e. g. the mixture laid between the cubic Zr6(Fe,Cr)3O and the monolithic oxide ZrO2, the later originated from the matrix of the zircaloy-4. The influence of the secondary phase particles on the oxidation behavior of the alloy is also discussed.
|Journal||Corrosion Science and Protection Technology|
|Publication status||Published - 1 Dec 1996|
- Secondary phase particales
- Zr(Fe,Cr) 2
ASJC Scopus subject areas
- Materials Science(all)