Synthesis, Magnetic and Mössbauer Studies of Mechanically Alloyed Fe0.63Si0.37 Alloys

Benilde F.O. Costa; Vitor S. Amaral; Gerard Le Caër; Gerard Le Caër

doi:10.4028/www.scientific.net/MSF.514-516.1265

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HomeMaterials Science ForumMaterials Science Forum Vols. 514-516Synthesis, Magnetic and Mössbauer Studies of...

Synthesis, Magnetic and Mössbauer Studies of Mechanically Alloyed Fe_0.63Si_0.37 Alloys

Abstract:

Elemental powder mixtures of Fe and Si were mechanically alloyed with a ball-mill. Mössbauer spectroscopy and X-ray diffraction were used to characterise the microstructural changes of these mixtures which are induced by high-energy ball-milling. Mössbauer spectra are discussed in terms of two main spectral components (corresponding to FeSi alloy and α-Fe) and the time dependence of the alloy formation follows a Johnson-Mehl type law. Calorimetry measurements show that the formed alloy is stable up to 800°C as no crystallisation or phase transformation peaks are observed. From X-ray diffraction, a crystallite size of 9 nm is obtained. Magnetic measurements at low temperature were carried out on the final alloy and the saturation magnetic moment at 4.2K is 0.44 μB/Fe.

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Materials Science Forum (Volumes 514-516)

Pages:

1265-1268

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.514-516.1265

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Online since:

May 2006

Authors:

Benilde F.O. Costa, Vitor S. Amaral, Gerard Le Caër, Gerard Le Caër

Keywords:

FeSi, Magnetisation, Mechanical Alloying (MA), Mössbauer

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