Changes in the state of iron atoms in Zr alloys during corrosion tests in an autoclave
| Autor: | V. P. Filippov, N. I. Kargin, A. B. Bateev, V. I. Petrov, Yu. A. Lauer |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Inorganic chemistry Metallurgy Zirconium alloy Intermetallic Oxide chemistry.chemical_element Condensed Matter Physics Atomic and Molecular Physics and Optics Corrosion Metal chemistry.chemical_compound Chromium chemistry visual_art visual_art.visual_art_medium Lithium Physical and Theoretical Chemistry Boron |
| Zdroj: | Hyperfine Interactions. 226:771-779 |
| ISSN: | 1572-9540 0304-3843 |
| DOI: | 10.1007/s10751-013-0970-y |
| Popis: | Mossbauerinvestigations were carried out on oxide films formed on specimens of zirconium alloys Zr-1.0 %wtFe-1.2 %wtSn-0.5 %wtCr subjected to corrosion in steam-water environment at a temperature of 360 °C and at a pressure of 16.8 MPa with lithium and boron additions, and on Zr-1.4 %wtFe-0.7 %wtCr corroded in steam-water environment at 350 °C and 16.8 MPa as well as in steam-water environment at 500 °C and 10 MPa. In the metal part of the samples, under the oxide film, the iron atoms are in form of intermetallic precipitates of Zr(Fe, Cr)2. The corrosion process decomposes the intermetallic precipitates and particles are formed of metallic iron with inclusions of chromium atoms –Fe(Cr), α–Fe2O3 and Fe3O4 compounds. Part of the iron ions are in divalent and part in trivalent paramagnetic states. It is proposed that some part of the iron containing oxide precipitates in the oxide film may be in the form of nanoparticles which pass from the superparamagnetic to the ferromagnetic state with decreasing temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink