CobaltMaghrebV1, Main, Exploration, bibRecord, 000823

Structure and properties of nanocrystalline Cu70Fe18Co12 obtained by mechanical alloying

Identifieur interne : 000823 ( Main/Exploration ); précédent : 000822; suivant : 000824

Structure and properties of nanocrystalline Cu70Fe18Co12 obtained by mechanical alloying

Auteurs : Warda Laslouni [Algérie] ; Kamel Taibi [Algérie] ; Djaffar Dahmoun [Algérie] ; Mohamed Azzaz [Algérie]

Source :

Journal of non-crystalline solids [ 0022-3093 ] ; 2007.

RBID : Pascal:07-0293665

Descripteurs français

Pascal (Inist)
- Alliage mécanique, Broyeur boulet, Microscopie électronique balayage, Diffraction RX, Effet Mössbauer, Analyse structurale, Microstructure, Nanocristal, Réseau cubique face centrée, Cuivre alliage, Métal transition alliage, 6146, 8107B.

English descriptors

KwdEn :
- Ball mill, Copper alloys, FCC lattices, Mechanical alloying, Microstructure, Moessbauer effect, Nanocrystal, Scanning electron microscopy, Structural analysis, Transition element alloys, XRD.

Abstract

Cu₇₀Fe₁₈Co₁₂ alloy is prepared by mechanical alloying of pure Cu, Fe, Co powder using a high energy ball mill, with increasing milling time ranging from 4 to 8, 24, 36 and 54 h. The variation of the morphology and the elemental distribution were measured at these different stages on various grains of the alloy using a scanning electron microscope with a dispersive energy analyzer. Atomic clusters of iron were observed on some grains after 8 h of milling, confirming the non-homogenisation of the powder at this stage. Beyond 12 h, the homogenisation is ensured over a volume of one cube micron. Microstructural changes during the mechanical alloying have been studied by X-ray diffractometry (XRD) and Mössbauer spectroscopy. X-ray diffraction measurements confirm the dissolution of iron and cobalt phases in the FCC matrix of copper after 24 h of milling with increase of the structural parameter. This same dissolution was also measured by Mössbauer spectroscopy, confirming that after 4 h of milling the CuFe phase begins to form and iron dissolution is incomplete with partial amount of alpha Fe phase surviving after 36 h of milling.

Affiliations:

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Le document en format XML

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Co<sub>12</sub>
 obtained by mechanical alloying</title>
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Co<sub>12</sub>
 obtained by mechanical alloying</title>
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<term>Moessbauer effect</term>
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<term>Effet Mössbauer</term>
<term>Analyse structurale</term>
<term>Microstructure</term>
<term>Nanocristal</term>
<term>Réseau cubique face centrée</term>
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<front><div type="abstract" xml:lang="en">Cu<sub>70</sub>
Fe<sub>18</sub>
Co<sub>12</sub>
 alloy is prepared by mechanical alloying of pure Cu, Fe, Co powder using a high energy ball mill, with increasing milling time ranging from 4 to 8, 24, 36 and 54 h. The variation of the morphology and the elemental distribution were measured at these different stages on various grains of the alloy using a scanning electron microscope with a dispersive energy analyzer. Atomic clusters of iron were observed on some grains after 8 h of milling, confirming the non-homogenisation of the powder at this stage. Beyond 12 h, the homogenisation is ensured over a volume of one cube micron. Microstructural changes during the mechanical alloying have been studied by X-ray diffractometry (XRD) and Mössbauer spectroscopy. X-ray diffraction measurements confirm the dissolution of iron and cobalt phases in the FCC matrix of copper after 24 h of milling with increase of the structural parameter. This same dissolution was also measured by Mössbauer spectroscopy, confirming that after 4 h of milling the CuFe phase begins to form and iron dissolution is incomplete with partial amount of alpha Fe phase surviving after 36 h of milling.</div>
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Structure and properties of nanocrystalline Cu70Fe18Co12 obtained by mechanical alloying

Structure and properties of nanocrystalline Cu70Fe18Co12 obtained by mechanical alloying

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri