Evolution under thermal annealing of Mn-doped iron disilicides obtained by ball milling
| Autor: | Judith Desimoni, Marcela Andrea Taylor, J. A. Martínez, J. Runco, S.M. Cotes |
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| Rok vydání: | 2007 |
| Předmět: |
Diffraction
Nuclear and High Energy Physics Materials science Annealing (metallurgy) Analytical chemistry Regular lattice Condensed Matter Physics Atomic and Molecular Physics and Optics Phase formation Crystallography Torr Mössbauer spectroscopy Mn doped Physical and Theoretical Chemistry Ball mill |
| Zdroj: | Hyperfine Interactions. 178:13-17 |
| ISSN: | 1572-9540 0304-3843 |
| DOI: | 10.1007/s10751-008-9649-1 |
| Popis: | Phase formation in the Mn doped β-FeSi2 system (Fe1− xMn x Si2 with 0.00≤x≤0.24) was studied using X-ray diffraction and Mossbauer spectroscopy. Samples were prepared by the simultaneous mill of pure Si, Mn and Fe under Ar atmosphere followed by an annealing at 1,123 K during 4 h at 1×10−7 Torr. After milling, an admixture of β-FeSi2, α-FeSi2 and ɛ-FeSi phases was present while α-FeSi2 disappeared after annealing, resulting β-FeSi2 the main phase. Depending on Mn concentration, small amounts of ɛ-FeSi and Si segregation were also observed. A preferential substitution of Fe atoms by Mn ones in the FeII site of the β-FeSi2 regular lattice was inferred from the Mossbauer results. |
| Databáze: | OpenAIRE |
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