EELS and atom probe tomography study of the evolution of the metal/oxide interface during zirconium alloy oxidation

Benoit De Gabory, Yan Dong, Arthur T. Motta, Emmanuelle A. Marquis

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

In an effort to understand the mechanisms resulting in the variations of corrosion rate observed throughout corrosion including at the first kinetic transition when the oxide temporarily loses its protective character, the oxide/metal interfaces of autoclave corroded Zircaloy-4 and ZIRLO™ before and after the transition are characterized using electron energy loss spectroscopy and atom probe tomography. The results reveal a complex structure of different phases at different stages of corrosion. The oxide/metal interface exhibits an intermediate layer, with an oxygen content between 45 and 55 O at.% and a suboxide layer corresponding to an oxygen-saturated solid solution in the metal matrix side (∼30 O at.%). Local variations are observed in the width of these characteristic structural features, especially near the transition. Good agreement on the layers present as well as their order, composition, and width was seen with the two techniques.

Original languageEnglish (US)
Pages (from-to)304-309
Number of pages6
JournalJournal of Nuclear Materials
Volume462
DOIs
StatePublished - Jun 14 2015

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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