Uranium oxidation kinetics monitored by in-situ X-ray diffraction

S. Zalkind, G. Rafailov, I. Halevy, T. Livneh, A. Rubin, H. Maimon, D. Schweke

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


The oxidation kinetics of U-0.1 wt%Cr at oxygen pressures of 150 Torr and the temperature range of 90–150 °C was studied by means of in-situ X-ray diffraction (XRD). A “breakaway” in the oxidation kinetics is found at ∼0.25 μm, turning from a parabolic to a linear rate law. At the initial stage of oxidation the growth plane of UO2(111) is the prominent one. As the oxide thickens, the growth rate of UO2(220) plane increases and both planes grow concurrently. The activation energies obtained for the oxide growth are Qparabolic = 17.5 kcal/mol and Qlinear = 19 kcal/mol. Enhanced oxidation around uranium carbide (UC) inclusions is clearly observed by scanning electron microscopy (SEM).

Original languageEnglish
Pages (from-to)202-206
Number of pages5
JournalJournal of Nuclear Materials
StatePublished - 1 Mar 2017
Externally publishedYes

ASJC Scopus subject areas

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


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