CobaltMaghrebV1, Main, Exploration, bibRecord, 000547

Solid state amorphisation of mechanically alloyed Fe-Co-Nb-B alloys : NANOTECHNOLOGY AND ADVANCED MATERIALS - PART II

Identifieur interne : 000547 ( Main/Exploration ); précédent : 000546; suivant : 000548

Solid state amorphisation of mechanically alloyed Fe-Co-Nb-B alloys : NANOTECHNOLOGY AND ADVANCED MATERIALS - PART II

Auteurs : R. Bensalem [Algérie] ; A. Younes [Algérie] ; S. Alleg [Algérie] ; S. Souilah [Algérie] ; S. Azzaza [Algérie] ; J. J. Sunol [Espagne] ; J. M. Greneche [France]

Source :

International journal of nanoparticles : (Print) [ 1753-2507 ] ; 2011.

RBID : Pascal:11-0308869

Descripteurs français

Pascal (Inist)
- Déformation mécanique, Diffraction RX, Poudre, Nanostructure, Calorimétrie, Fer, Fer alliage, Cobalt alliage, Niobium alliage, Bore alliage, Spectre Mössbauer, Alliage mécanique, Amorphisation, 8107B, 8120E.
Wicri :
- topic : Fer.

English descriptors

KwdEn :
- Amorphization, Boron alloys, Calorimetry, Cobalt alloys, Iron, Iron alloys, Mechanical alloying, Moessbauer spectrum, Nanostructures, Niobium alloys, Powders, Strains, XRD.

Abstract

Fe₆₁Co₂₁Nb₃B₁₅ powder mixture was prepared by mechanical alloying process in a high energy planetary ball mill. Structural and thermal changes of the milled powders were followed by X-ray diffraction (XRD), Mössbauer spectrometry and differential scanning calorimetry (DSC). Both XRD and Mössbauer spectrometry results reveal the formation, after 48 h of milling, of a highly disordered amorphous-like structure where nanometer-sized iron borides were embedded. A mechanical recrystallisation process gives rise to the formation of α-Fe and α-FeCo nanograins on further milling. The occurrence of structural disorder in the milled powders might be confirmed by broad exothermic reaction in the DSC scans which consists of several overlapping exothermic peaks. Such behaviour originates from recovery, strain relaxation, grain growth and crystallisation.

Affiliations:

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Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Amorphization</term>
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<term>Iron</term>
<term>Iron alloys</term>
<term>Mechanical alloying</term>
<term>Moessbauer spectrum</term>
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<term>Fer</term>
<term>Fer alliage</term>
<term>Cobalt alliage</term>
<term>Niobium alliage</term>
<term>Bore alliage</term>
<term>Spectre Mössbauer</term>
<term>Alliage mécanique</term>
<term>Amorphisation</term>
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<front><div type="abstract" xml:lang="en">Fe<sub>61</sub>
Co<sub>21</sub>
Nb<sub>3</sub>
B<sub>15</sub>
 powder mixture was prepared by mechanical alloying process in a high energy planetary ball mill. Structural and thermal changes of the milled powders were followed by X-ray diffraction (XRD), Mössbauer spectrometry and differential scanning calorimetry (DSC). Both XRD and Mössbauer spectrometry results reveal the formation, after 48 h of milling, of a highly disordered amorphous-like structure where nanometer-sized iron borides were embedded. A mechanical recrystallisation process gives rise to the formation of α-Fe and α-FeCo nanograins on further milling. The occurrence of structural disorder in the milled powders might be confirmed by broad exothermic reaction in the DSC scans which consists of several overlapping exothermic peaks. Such behaviour originates from recovery, strain relaxation, grain growth and crystallisation.</div>
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Solid state amorphisation of mechanically alloyed Fe-Co-Nb-B alloys : NANOTECHNOLOGY AND ADVANCED MATERIALS - PART II

Solid state amorphisation of mechanically alloyed Fe-Co-Nb-B alloys : NANOTECHNOLOGY AND ADVANCED MATERIALS - PART II

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