Nanostructured (Fe0.5Ni0.5)92Zr5B3 alloy was prepared by milling a blend of pre-alloyed Fe50Ni50 precursor and high purity chemical elemental powders of Zr and B in a high-energy ball mill setup. Rietveld refinement of the X-ray diffraction pattern of the final sample (30 h of milling) revealed presence of two Fe–Ni rich phases [disordered fcc γ–(Fe,Ni) alloy with Zr and B and the atomically ordered FeNi] with grain sizes in nanometer scale. Fe and Ni atoms were locally probed using extended X-ray absorption fine structure EXAFS and 57Fe Mössbauer spectroscopy. Whilst EXAFS analysis of milled samples suggested structural properties similar to the pre-alloyed precursor, Mössbauer data have shown the Fe2B phase formation after 3 h of milling, suggesting that the final material consists of nanograins of ordered FeNi (8%) and Fe2B (6%) phases dispersed in solid solution of γ–(Fe,Ni) alloy rich in nickel (86%) with Zr and B atoms impregnated in grain boundary defects.
Bibliographical noteFunding Information:
This work was supported by the Brazilian Synchrotron Light Laboratory (LNLS) under proposal XAFS1 – 1304. The authors would like to acknowledge the financial support provided by the National Fund for Scientific and Technological Development, FONDECYT [ contract 011-2014-FONDECYT], FAPERJ-Brazil (Emeritus fellowship, EBS, E26/210.715/2014, E-26/010.002990/2014 grants), FINEP, FAPES, CNPq, and Latin American Center of Physics. The authors would also like to acknowledge the San Marcos National University for providing research facilities and financial support [CSI-projects: 061301011-0801301011-091301031].
© 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
- Extended X-ray absorption fine structure
- High energy ball milling
- Hyperfine interactions
- Nanostructured materials