Local environments of Fe and Co in (Fe0.5Co0.5)75Si15B10 mechanically alloyed

V. A.Peña Rodríguez; J. Quispe Marcatoma; Ch Rojas Ayala; E. M. Baggio-Saitovitch; E. C. Passamani

doi:10.1016/j.jallcom.2008.07.104

Local environments of Fe and Co in (Fe_0.5Co_0.5)₇₅Si₁₅B₁₀ mechanically alloyed

V. A.Peña Rodríguez, J. Quispe Marcatoma, Ch Rojas Ayala, E. M. Baggio-Saitovitch, E. C. Passamani

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

4 Citas (Scopus)

Resumen

During the milling process, local environments of Fe and Co in mechanically alloyed (Fe_0.5Co_0.5)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 (Fe_0.5Co_0.5)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.

Idioma original	Inglés
Páginas (desde-hasta)	29-34
Número de páginas	6
Publicación	Journal of Alloys and Compounds
Volumen	475
N.º	1-2
DOI	https://doi.org/10.1016/j.jallcom.2008.07.104
Estado	Publicada - 5 may. 2009
Publicado de forma externa	Sí

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title = "Local environments of Fe and Co in (Fe0.5Co0.5)75Si15B10 mechanically alloyed",

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 M{\"o}ssbauer 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. M{\"o}ssbauer data suggest that the milled end-sample (19 h sample) consists of nanograins of ordered BCC-FeCo (13%) embedded in FeCoSiB amorphous matrix phase.",

keywords = "EXAFS, Fe M{\"o}ssbauer spectroscopy, Grain boundaries, Mechanical alloying, Nanostructured materials",

author = "Rodr{\'i}guez, {V. A.Pe{\~n}a} and Marcatoma, {J. Quispe} and Ayala, {Ch Rojas} and Baggio-Saitovitch, {E. M.} and Passamani, {E. C.}",

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.",

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AU - Rodríguez, V. A.Peña

AU - Marcatoma, J. Quispe

AU - Ayala, Ch Rojas

AU - Baggio-Saitovitch, E. M.

AU - Passamani, E. C.

N1 - 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.

PY - 2009/5/5

Y1 - 2009/5/5

N2 - 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.

AB - 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.

KW - EXAFS

KW - Fe Mössbauer spectroscopy

KW - Grain boundaries

KW - Mechanical alloying

KW - Nanostructured materials

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