Serveur d'exploration sur le nickel au Maghreb

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X-ray diffraction, microstructure, Mössbauer and magnetization studies of nanostructured Fe50Ni50 alloy prepared by mechanical alloying

Identifieur interne : 000570 ( Main/Exploration ); précédent : 000569; suivant : 000571

X-ray diffraction, microstructure, Mössbauer and magnetization studies of nanostructured Fe50Ni50 alloy prepared by mechanical alloying

Auteurs : A. Guittoum [Algérie] ; A. Layadi [Algérie] ; A. Bourzami [Algérie] ; H. Tafat [Algérie] ; N. Souami [Algérie] ; S. Boutarfaia [Algérie] ; Daniel Lacour [France]

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RBID : Pascal:08-0253702

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English descriptors

Abstract

Nanocrystalline Fe50Ni50 alloy samples were prepared by the mechanical alloying process using planetary high-energy ball mill. The alloy formation and different physical properties were investigated as a function of milling time, t, (in the 0-50 h range) by means of the X-ray diffraction (XRD) technique, scanning electron microscopy (SEM), energy dispersive X-ray (EDAX), Mössbauer spectroscopy and the vibrating sample magnetometer (VSM). The complete formation of γ-FeNi is observed after 24 h milling. When milling time increases from 0 to 50 h, the lattice parameter increases towards the Fe50Ni50 bulk value, the grain size decreases from 67 to 13 nm, while the strain increases from 0.09% to 0.41%. Grain morphologies at different formation stages were observed by SEM. Saturation magnetization and coercive fields derived from the hysteresis curves are discussed as a function of milling time.


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<sub>50</sub>
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<div type="abstract" xml:lang="en">Nanocrystalline Fe
<sub>50</sub>
Ni
<sub>50</sub>
alloy samples were prepared by the mechanical alloying process using planetary high-energy ball mill. The alloy formation and different physical properties were investigated as a function of milling time, t, (in the 0-50 h range) by means of the X-ray diffraction (XRD) technique, scanning electron microscopy (SEM), energy dispersive X-ray (EDAX), Mössbauer spectroscopy and the vibrating sample magnetometer (VSM). The complete formation of γ-FeNi is observed after 24 h milling. When milling time increases from 0 to 50 h, the lattice parameter increases towards the Fe
<sub>50</sub>
Ni
<sub>50</sub>
bulk value, the grain size decreases from 67 to 13 nm, while the strain increases from 0.09% to 0.41%. Grain morphologies at different formation stages were observed by SEM. Saturation magnetization and coercive fields derived from the hysteresis curves are discussed as a function of milling time.</div>
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