Local environments of Fe and Co in (Fe0.5Co0.5)75Si15B10 mechanically alloyed
| Autor: | Ch. Rojas Ayala, V. A. Peña Rodríguez, J. Quispe Marcatoma, E. M. Baggio-Saitovitch, Edson C. Passamani |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Extended X-ray absorption fine structure Silicon Mössbauer effect Mechanical Engineering Metals and Alloys Analytical chemistry chemistry.chemical_element Crystallographic defect Crystallography chemistry Mechanics of Materials Phase (matter) Mössbauer spectroscopy Materials Chemistry Grain boundary Absorption (chemistry) |
| Zdroj: | Journal of Alloys and Compounds. 475:29-34 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2008.07.104 |
| Popis: | During the milling process, local environments of Fe and Co in mechanically alloyed (Fe0.5Co0.5)75Si15B10 powders were systematically investigated using extended X-ray absorption fine structure (EXAFS) and 57Fe Mossbauer spectroscopy. While no substantial changes on the Fe-short-range order are observed in the Fe-edge EXAFS as a function of milling time, the Co-edge EXAFS data show significant modification on the Co-short-range order due to the presence of Si for the (Fe0.5Co0.5)75Si15B10 alloys milled longer than 10 h. Mossbauer data suggest that the milled end-sample (19 h sample) consists of nanograins of ordered BCC-FeCo (13%) embedded in FeCoSiB amorphous matrix phase. |
| Databáze: | OpenAIRE |
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