Formation study of nanostructured Cr100-xCox (x = 10, 90) alloys
Identifieur interne : 000452 ( Main/Exploration ); précédent : 000451; suivant : 000453Formation study of nanostructured Cr100-xCox (x = 10, 90) alloys
Auteurs : S. Louidi [Algérie] ; F. Z. Bentayeb [Algérie] ; W. Tebib [Algérie] ; J. J. Sunol [Espagne] ; L. Escoda [Espagne] ; A. M. Mercier [France]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 2012.
Descripteurs français
- Pascal (Inist)
- Alliage mécanique, Microscopie électronique balayage, Diffraction RX, Paramètre cristallin, Densité défaut, Méthode Rietveld, Microdéformation, Microstructure, Ductilité, Densité dislocation, Broyeur boulet, Relation structure propriété, Synthèse nanomatériau, Alliage désordonné, Alliage ordonné, Nanocristal, Chrome alliage, Solution solide, Cobalt alliage.
English descriptors
- KwdEn :
- Ball mill, Chromium alloys, Cobalt alloys, Defect density, Dislocation density, Disordered alloy, Ductility, Lattice parameters, Mechanical alloying, Microdeformation, Microstructure, Nanocrystal, Nanomaterial synthesis, Ordered alloy, Property structure relationship, Rietveld method, Scanning electron microscopy, Solid solutions, XRD.
Abstract
Cr90Co10 and Cr10Co90 mixtures were mechanically alloyed in order to obtain nanocrystalline alloys. The obtained powders were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The structural parameters such as the lattice parameters, the crystallite size, the microstrains and the defect density of the different phases were deduced from the Rietveld refinement of the XRD patterns using the MAUD program. For the Co-rich mixture the evolution with milling time of the SEM micrographs shows a tendency of particle agglomeration. However, in the case of the Cr-rich mixture, the particles tend to the fragmentation. The Rietveld refinement of XRD patterns of the Cr10Co90 mixture reveals the formation of disordered hcp and fcc Co(Cr) solid solutions. In the case of the Cr90Co10 mixture, only a disordered bcc Cr(Co) solid solution is obtained. The changes in the morphology and the structure of the two mixtures are explained on the basis of the mechanical and structural properties.
Affiliations:
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Louidi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Departement des Sciences de la Matière, Facultés des Sciences, Universite 20 Août 1955, B.P 26</s1><s2>Skikda</s2><s3>DZA</s3><sZ>1 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Skikda</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Laboratoire de Magnétisme et de Spectroscopie des Solides LM2S, Département de Physique, Faculté des Sciences, Université Badji-Mokhtar, B.P 12</s1><s2>23000 Annaba</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>23000 Annaba</wicri:noRegion></affiliation></author><author><name sortKey="Bentayeb, F Z" sort="Bentayeb, F Z" uniqKey="Bentayeb F" first="F. Z." last="Bentayeb">F. Z. Bentayeb</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Laboratoire de Magnétisme et de Spectroscopie des Solides LM2S, Département de Physique, Faculté des Sciences, Université Badji-Mokhtar, B.P 12</s1><s2>23000 Annaba</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>23000 Annaba</wicri:noRegion></affiliation></author><author><name sortKey="Tebib, W" sort="Tebib, W" uniqKey="Tebib W" first="W." last="Tebib">W. Tebib</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Laboratoire de Magnétisme et de Spectroscopie des Solides LM2S, Département de Physique, Faculté des Sciences, Université Badji-Mokhtar, B.P 12</s1><s2>23000 Annaba</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>23000 Annaba</wicri:noRegion></affiliation></author><author><name sortKey="Sunol, J J" sort="Sunol, J J" uniqKey="Sunol J" first="J. J." last="Sunol">J. J. Sunol</name><affiliation wicri:level="2"><inist:fA14 i1="03"><s1>Dep. De Fisica, Universitat de Girona, Campus de Montitlivi</s1><s2>Girona 17071</s2><s3>ESP</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Catalogne</region></placeName></affiliation></author><author><name sortKey="Escoda, L" sort="Escoda, L" uniqKey="Escoda L" first="L." last="Escoda">L. Escoda</name><affiliation wicri:level="2"><inist:fA14 i1="03"><s1>Dep. De Fisica, Universitat de Girona, Campus de Montitlivi</s1><s2>Girona 17071</s2><s3>ESP</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Catalogne</region></placeName></affiliation></author><author><name sortKey="Mercier, A M" sort="Mercier, A M" uniqKey="Mercier A" first="A. M." last="Mercier">A. M. Mercier</name><affiliation wicri:level="4"><inist:fA14 i1="04"><s1>Laboratoire des Fluorures, UMR CNRS 6010, Universite du Maine</s1><s2>72085 Le Mans</s2><s3>FRA</s3><sZ>6 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Pays de la Loire</region><settlement type="city">Le Mans</settlement></placeName><orgName type="university">Université du Maine</orgName></affiliation></author></analytic><series><title level="j" type="main">Journal of alloys and compounds</title><title level="j" type="abbreviated">J. alloys compd.</title><idno type="ISSN">0925-8388</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of alloys and compounds</title><title level="j" type="abbreviated">J. alloys compd.</title><idno type="ISSN">0925-8388</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ball mill</term><term>Chromium alloys</term><term>Cobalt alloys</term><term>Defect density</term><term>Dislocation density</term><term>Disordered alloy</term><term>Ductility</term><term>Lattice parameters</term><term>Mechanical alloying</term><term>Microdeformation</term><term>Microstructure</term><term>Nanocrystal</term><term>Nanomaterial synthesis</term><term>Ordered alloy</term><term>Property structure relationship</term><term>Rietveld method</term><term>Scanning electron microscopy</term><term>Solid solutions</term><term>XRD</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Alliage mécanique</term><term>Microscopie électronique balayage</term><term>Diffraction RX</term><term>Paramètre cristallin</term><term>Densité défaut</term><term>Méthode Rietveld</term><term>Microdéformation</term><term>Microstructure</term><term>Ductilité</term><term>Densité dislocation</term><term>Broyeur boulet</term><term>Relation structure propriété</term><term>Synthèse nanomatériau</term><term>Alliage désordonné</term><term>Alliage ordonné</term><term>Nanocristal</term><term>Chrome alliage</term><term>Solution solide</term><term>Cobalt alliage</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Cr<sub>90</sub>Co<sub>10</sub> and Cr<sub>10</sub>Co<sub>90</sub> mixtures were mechanically alloyed in order to obtain nanocrystalline alloys. The obtained powders were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD). The structural parameters such as the lattice parameters, the crystallite size, the microstrains and the defect density of the different phases were deduced from the Rietveld refinement of the XRD patterns using the MAUD program. For the Co-rich mixture the evolution with milling time of the SEM micrographs shows a tendency of particle agglomeration. However, in the case of the Cr-rich mixture, the particles tend to the fragmentation. The Rietveld refinement of XRD patterns of the Cr<sub>10</sub>Co<sub>90</sub> mixture reveals the formation of disordered hcp and fcc Co(Cr) solid solutions. In the case of the Cr<sub>90</sub>Co<sub>10</sub> mixture, only a disordered bcc Cr(Co) solid solution is obtained. The changes in the morphology and the structure of the two mixtures are explained on the basis of the mechanical and structural properties.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>Espagne</li><li>France</li></country><region><li>Catalogne</li><li>Pays de la Loire</li></region><settlement><li>Le Mans</li></settlement><orgName><li>Université du Maine</li></orgName></list><tree><country name="Algérie"><noRegion><name sortKey="Louidi, S" sort="Louidi, S" uniqKey="Louidi S" first="S." last="Louidi">S. Louidi</name></noRegion><name sortKey="Bentayeb, F Z" sort="Bentayeb, F Z" uniqKey="Bentayeb F" first="F. Z." last="Bentayeb">F. Z. Bentayeb</name><name sortKey="Louidi, S" sort="Louidi, S" uniqKey="Louidi S" first="S." last="Louidi">S. Louidi</name><name sortKey="Tebib, W" sort="Tebib, W" uniqKey="Tebib W" first="W." last="Tebib">W. Tebib</name></country><country name="Espagne"><region name="Catalogne"><name sortKey="Sunol, J J" sort="Sunol, J J" uniqKey="Sunol J" first="J. J." last="Sunol">J. J. Sunol</name></region><name sortKey="Escoda, L" sort="Escoda, L" uniqKey="Escoda L" first="L." last="Escoda">L. Escoda</name></country><country name="France"><region name="Pays de la Loire"><name sortKey="Mercier, A M" sort="Mercier, A M" uniqKey="Mercier A" first="A. M." last="Mercier">A. M. Mercier</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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