Abstract

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 Mössbauer 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. Mössbauer data suggest that the milled end-sample (19 h sample) consists of nanograins of ordered BCC-FeCo (13%) embedded in FeCoSiB amorphous matrix phase.

Original languageEnglish
Pages (from-to)29-34
Number of pages6
JournalJournal of Alloys and Compounds
Volume475
Issue number1-2
DOIs
StatePublished - 5 May 2009

Bibliographical note

Funding Information:
This work has been supported by the Brazilian Synchrotron Light Laboratory (LNLS) under proposal D04B-XAS1-1899. The authors would like to acknowledge the financial support provided by CSI-UNMSM under Projects No. 021301021–031301011, FAPERJ-Brazil (Cientista do Nosso Estado), FINEP, FAPES and Latin American Center of Physics.

Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.

Keywords

  • EXAFS
  • Fe Mössbauer spectroscopy
  • Grain boundaries
  • Mechanical alloying
  • Nanostructured materials

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