Effect of the milling conditions on the formation of nanostructured Fe-Co powders
Identifieur interne : 000793 ( Main/Curation ); précédent : 000792; suivant : 000794Effect of the milling conditions on the formation of nanostructured Fe-Co powders
Auteurs : Safia Alleg [Algérie] ; FATIMA ZOHRA BENTAYEB [Algérie] ; Rachid Bensalem [Algérie] ; Chafia Djebbari [Algérie] ; Lotfi Bessais [France] ; Jean Marc Greneche [France]Source :
- Physica status solidi. A, Applications and materials science : (Print) [ 1862-6300 ] ; 2008.
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- Pascal (Inist)
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Abstract
Nanostructured Fe-12Co (wt%) powders were prepared by mechanical alloying in a planetary ball mill. The milling process was carried out at different milling conditions, The obtained powders were characterized by X-ray diffraction, 57 Fe Mössbauer spectrometry and magnetic measurements. The low and high speed ball-milling conditions lead to the formation of a single and two-bcc Fe(Co) structure, respectively, having different crystallite sizes, microstrains hyperfine parameters and magnetic properties. The average hyperfine magnetic field values: 1 34.8 T and 2 =28.2 T of the two-bcc Fe(Co) structure could be attributed to the nanocrystalline grains and to the grain boundaries, respectively.
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<front><div type="abstract" xml:lang="en">Nanostructured Fe-12Co (wt%) powders were prepared by mechanical alloying in a planetary ball mill. The milling process was carried out at different milling conditions, The obtained powders were characterized by X-ray diffraction, <sup>57</sup>
Fe Mössbauer spectrometry and magnetic measurements. The low and high speed ball-milling conditions lead to the formation of a single and two-bcc Fe(Co) structure, respectively, having different crystallite sizes, microstrains hyperfine parameters and magnetic properties. The average hyperfine magnetic field values: <sub>1</sub>
34.8 T and <sub>2</sub>
=28.2 T of the two-bcc Fe(Co) structure could be attributed to the nanocrystalline grains and to the grain boundaries, respectively.</div>
</front>
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