
handle: 10614/13983
En el presente trabajo se realizó el estudio de los parámetros hiperfinos y estructurales del sistema Fe0.5Si0.5, mediante espectrometría Mössbauer (EM) y difracción de rayos X (DRX). Las muestras fueron preparadas mediante aleamiento mecánico moliendas durante 2, 4, 8, 12, 24, 36 y 48 horas, en un molino planetario de alta energía Pulverisette 5. El estudio Mössbauer se realizó a temperatura ambiente. El ajuste de espectros para las muestras entre 2 y 12 horas se realizó con un sextete correspondiente al α-Fe y un doblete, el cual, de acuerdo con su carácter aramagnético, se asocia a la fase FCC del silicio. Ésta componente aumenta con el tiempo de molienda. El ajuste de los espectros correspondientes a 24, 36 y 48 horas se realizó con 3 sextetes y un doblete. El sextete inicial se conservó durante todo el proceso de aleamiento, con un campo hiperfino medio (HBf) de 33.0 T. Este resultado está apoyado con los obtenidos por rayos X, donde se encontró la presencia de la estructura BCC del Fe durante todo el proceso.
In the present work the study of the hyperfine and structural parameters of the Fe0.5Si0.5 system took place, by means of Mössbauer spectrometry (ME) and X-ray diffraction (XRD). The samples were prepared by means of mechanical alloying milling during 2, 4, 8, 12, 24, 36 and 48 hours, in the high energy planetary ball mill Pulverisette 5. The Mössbauer study was realized at room temperature. The adjustment of patterns for samples milled from 2 to 12 hours was realized with a sextet of the -Fe and a doublet which, in agreement with its paramagnetic character, is associated to FCC phase of silicon. This component increases with milling time. The adjustment of the patterns corresponding to 24, 36 and 48 hours was realized with 3 sextetes and a doublet. The initial sextet was conserved during the milling process, with a mean hyperfine field (HBf) of 33,0 T. This result is supported by the obtained X-rays results, which detected the presence of the BCC Fe structure during all the milling process
Espectrometría Mössbauer, Aleamiento Mecánico, Análisis espectral, Difracción de rayos X, Spectrometry Mössbauer, Mechanical alloying, FeSi, Spectrum analysis, Diffraction X ray
Espectrometría Mössbauer, Aleamiento Mecánico, Análisis espectral, Difracción de rayos X, Spectrometry Mössbauer, Mechanical alloying, FeSi, Spectrum analysis, Diffraction X ray
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