Amorphisation of Cr-10Co mixture by mechanical alloying
Identifieur interne : 000646 ( Main/Exploration ); précédent : 000645; suivant : 000647Amorphisation of Cr-10Co mixture by mechanical alloying
Auteurs : S. Louidi [Algérie] ; F. Z. Bentayeb [Algérie] ; W. Tebi [Algérie, Espagne] ; J. J. Sunol [Espagne] ; A. M. Mercier [France] ; J. M. Greneche [France]Source :
- Journal of non-crystalline solids [ 0022-3093 ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Amorphisation, Alliage mécanique, Microscopie électronique balayage, Spectrométrie dispersive, Diffraction RX, Calorimétrie différentielle balayage, Transformation allotropique, Relaxation contrainte, Addition fer, Cristallisation, Méthode Rietveld, Traitement thermique, Alliage base chrome, Cobalt alliage, Nanostructure, Réseau cubique face centrée, Réseau hexagonal compact, Métal transition alliage.
English descriptors
- KwdEn :
- Allotropic transformation, Amorphization, Chromium base alloys, Cobalt alloys, Crystallization, Differential scanning calorimetry, Dispersive spectrometry, FCC lattices, HCP lattices, Heat treatments, Iron additions, Mechanical alloying, Nanostructures, Rietveld method, Scanning electron microscopy, Stress relaxation, Transition element alloys, XRD.
Abstract
Mechanical alloying of blended chromium and cobalt powders is carried out in order to obtain a nano-structured Cr-10Co alloy. The alloy formation is studied by means of scanning electron microscopy with energy-dispersive X-ray analysis, X-ray diffraction and differential scanning calorimetry. The results show that an allotropic transformation of Co from fcc to hcp structure occurs within the first 3 h of milling. After 12 h of milling, nanostructured bcc-Cr(Co) solid solution is obtained. Contamination of the powder by the milling tools and atmosphere for 24 h of milling contributes to the formation of a high degree of structural disorder. In addition to Fe, Cr and Co oxides, Cr(Co) solid solutions with bcc and unusual hcp structures are formed. The differential scanning calorimetry analysis in the temperature range 50-700 °C gives evidence for the presence of both microstrain relaxation and crystallization of the amorphous-like structures. Heating the 24 h-milled powder at 600 °C leads to the formation of bcc-Cr, Fe oxide and tetragonal σ-CrCo phases.
Affiliations:
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Bentayeb</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Magnétisme et de Spectroscopie des Solides (LM2S), Département de Physique, Faculté des Sciences, Université de Annaba, 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="Tebi, W" sort="Tebi, W" uniqKey="Tebi W" first="W." last="Tebi">W. Tebi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Magnétisme et de Spectroscopie des Solides (LM2S), Département de Physique, Faculté des Sciences, Université de Annaba, 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><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Dep. 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Louidi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Magnétisme et de Spectroscopie des Solides (LM2S), Département de Physique, Faculté des Sciences, Université de Annaba, 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="01"><s1>Laboratoire de Magnétisme et de Spectroscopie des Solides (LM2S), Département de Physique, Faculté des Sciences, Université de Annaba, 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="Tebi, W" sort="Tebi, W" uniqKey="Tebi W" first="W." last="Tebi">W. Tebi</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Magnétisme et de Spectroscopie des Solides (LM2S), Département de Physique, Faculté des Sciences, Université de Annaba, 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><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Dep. Fisica, Universitat Girona, Campus Montilivi</s1><s2>17071 Girona</s2><s3>ESP</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>Espagne</country><placeName><region nuts="2" type="communauté">Catalogne</region></placeName></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="02"><s1>Dep. Fisica, Universitat Girona, Campus Montilivi</s1><s2>17071 Girona</s2><s3>ESP</s3><sZ>3 aut.</sZ><sZ>4 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="03"><s1>Laboratoire des Fluorures, UMR CNRS 6010, Université du Maine</s1><s2>72085 Le Mans</s2><s3>FRA</s3><sZ>5 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><author><name sortKey="Greneche, J M" sort="Greneche, J M" uniqKey="Greneche J" first="J. M." last="Greneche">J. M. Greneche</name><affiliation wicri:level="4"><inist:fA14 i1="04"><s1>Laboratoire de Physique de l'Etat Condensé, UMR CNRS 6087, Université 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 non-crystalline solids</title><title level="j" type="abbreviated">J. non-cryst. solids</title><idno type="ISSN">0022-3093</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of non-crystalline solids</title><title level="j" type="abbreviated">J. non-cryst. solids</title><idno type="ISSN">0022-3093</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Allotropic transformation</term><term>Amorphization</term><term>Chromium base alloys</term><term>Cobalt alloys</term><term>Crystallization</term><term>Differential scanning calorimetry</term><term>Dispersive spectrometry</term><term>FCC lattices</term><term>HCP lattices</term><term>Heat treatments</term><term>Iron additions</term><term>Mechanical alloying</term><term>Nanostructures</term><term>Rietveld method</term><term>Scanning electron microscopy</term><term>Stress relaxation</term><term>Transition element alloys</term><term>XRD</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Amorphisation</term><term>Alliage mécanique</term><term>Microscopie électronique balayage</term><term>Spectrométrie dispersive</term><term>Diffraction RX</term><term>Calorimétrie différentielle balayage</term><term>Transformation allotropique</term><term>Relaxation contrainte</term><term>Addition fer</term><term>Cristallisation</term><term>Méthode Rietveld</term><term>Traitement thermique</term><term>Alliage base chrome</term><term>Cobalt alliage</term><term>Nanostructure</term><term>Réseau cubique face centrée</term><term>Réseau hexagonal compact</term><term>Métal transition alliage</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Mechanical alloying of blended chromium and cobalt powders is carried out in order to obtain a nano-structured Cr-10Co alloy. The alloy formation is studied by means of scanning electron microscopy with energy-dispersive X-ray analysis, X-ray diffraction and differential scanning calorimetry. The results show that an allotropic transformation of Co from fcc to hcp structure occurs within the first 3 h of milling. After 12 h of milling, nanostructured bcc-Cr(Co) solid solution is obtained. Contamination of the powder by the milling tools and atmosphere for 24 h of milling contributes to the formation of a high degree of structural disorder. In addition to Fe, Cr and Co oxides, Cr(Co) solid solutions with bcc and unusual hcp structures are formed. The differential scanning calorimetry analysis in the temperature range 50-700 °C gives evidence for the presence of both microstrain relaxation and crystallization of the amorphous-like structures. Heating the 24 h-milled powder at 600 °C leads to the formation of bcc-Cr, Fe oxide and tetragonal σ-CrCo phases.</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="Tebi, W" sort="Tebi, W" uniqKey="Tebi W" first="W." last="Tebi">W. Tebi</name></country><country name="Espagne"><region name="Catalogne"><name sortKey="Tebi, W" sort="Tebi, W" uniqKey="Tebi W" first="W." last="Tebi">W. Tebi</name></region><name sortKey="Sunol, J J" sort="Sunol, J J" uniqKey="Sunol J" first="J. J." last="Sunol">J. J. Sunol</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><name sortKey="Greneche, J M" sort="Greneche, J M" uniqKey="Greneche J" first="J. M." last="Greneche">J. M. Greneche</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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