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Mössbauer Investigations of the Chemical States of Tin and Iron Atoms in Zirconium Alloy Oxide Film Pages: 19 Published: Jan 2002
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View License Agreement Source: STP1423-EB Abstract The chemical states of tin and iron atoms were investigated by Mössbauer spectroscopy on oxide films (of various thicknesses) formed on a Zr-1.3% Sn-1% Fe-0.5% Cr-0.12% O alloy (enriched with Sn and Fe) in an autoclave at 633 K with 10 ppm Li and 650 ppm B. Specimens were analyzed by Conversion Electron Mössbauer Spectroscopy ( = 298 K) and -ray transmission ( = 298 and 77 K) modes to investigate the surface and the bulk of the oxide films, respectively. The main results on the oxide were as follows: For tin atoms: Sn and Snwere clearly identified. In addition, metallic -Sn was greatly suspected. For iron atoms: Zr(Fe,Cr) precipitates, -Fe, FeO, Fe, and Fe, were clearly detected. Moreover, it was shown that during the oxide film growth the chemical states of tin and iron atoms change, in particular after the kinetic transition.
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