Fe 50 Ni 50 synthesized by high energy ball milling: A systematic study using X-ray diffraction, EXAFS and Mössbauer methods

V. A.Peña Rodríguez, C. Rojas-Ayala, J. Medina Medina, P. Paucar Cabrera, J. Quispe-Marcatoma, C. V. Landauro, J. Rojas Tapia, E. M. Baggio-Saitovitch, E. C. Passamani

Research output: Contribution to journalReview articlepeer-review

3 Scopus citations

Abstract

Fe 50 Ni 50 alloy powder was prepared by milling the 1:1 stoichiometric mixture of Fe and Ni high purity elements using high energy vibrational ball-mill. Final powdered material was obtained directly after 30 h of milling process and the Rietveld analysis of the X-ray diffraction pattern of the sample reveals the presence of two Fe–Ni phases: the disordered γ–(Fe 45 Ni 55 ) alloy, with 91% of total fraction of the material (Fe–Ni solid solution plus grain boundary regions) and the chemically-ordered FeNi phase (9%), with L1 0 tetragonal structure. Average grain sizes of these Fe–Ni phases are respectively 60 nm and 20 nm. Results of extended X-ray absorption fine structure of Ni and Fe as well as 57 Fe Mössbauer spectroscopy also suggest the presence of atomically ordered FeNi phase. Mössbauer data have also shown that both Fe–Ni phases are magnetically ordered at room temperature. Our results indicate that high energy milling method can simulate extreme conditions of sample preparation required for the formation of the T-FeNi phase.

Original languageEnglish
Pages (from-to)249-254
Number of pages6
JournalMaterials Characterization
Volume149
DOIs
StatePublished - Mar 2019

Bibliographical note

Funding Information:
This work has been supported by the Brazilian Synchrotron Light Laboratory (LNLS) under proposal XAFS1 – 1304. The authors would also like to acknowledge the financial support provided by CSI-UNMSM under project N.o 0801301011, contract 011-2014-FONDECYT, FAPERJ-Brazil (PV Emeritus), FINEP, FAPES and Latin American Center of Physics.

Funding Information:
This work has been supported by the Brazilian Synchrotron Light Laboratory (LNLS) under proposal XAFS1 – 1304 . The authors would also like to acknowledge the financial support provided by CSI - UNMSM under project N. o 0801301011 , contract 011-2014-FONDECYT, FAPERJ-Brazil (PV Emeritus), FINEP, FAPES and Latin American Center of Physics.

Publisher Copyright:
© 2019

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

  • Extended X-ray absorption fine structure
  • Mechanical alloying
  • Mössbauer spectroscopy
  • Nanostructured materials
  • X-ray diffraction

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