Formation study of the ball-milled Cr20Co80 alloy
Identifieur interne : 000092 ( PascalFrancis/Checkpoint ); précédent : 000091; suivant : 000093Formation study of the ball-milled Cr20Co80 alloy
Auteurs : S. Louidi [Algérie] ; F.-Z. Bentayeb [Algérie] ; J. J. Sunol [Espagne] ; L. Escoda [Espagne]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Broyeur boulet, Broyeur satellite, Modification structure, Diffraction RX, Microstructure, Densité défaut empilement, Métallurgie poudre, Densité dislocation, Défaut empilement, Cinétique, Cobalt alliage, Réseau cubique face centrée, Réseau hexagonal compact, Chrome alliage, Métal transition alliage.
English descriptors
- KwdEn :
Abstract
The ball milling of blended chromium and cobalt powders was carried out in a planetary mill in order to obtain a nanostructured Cr20Co80 alloy. The structural modifications at different stages of the ball milling are investigated with X-ray diffraction. Several microstructure parameters such as the crystallite size, microstrains, stacking faults, dislocation density and phase fractions are determined. As the milling proceeded, the chromium peaks disappeared progressively indicating the dissolution of the chromium atoms into the cobalt matrix. Disordered hcp-Co(Cr) and fcc-Co(Cr) solid solutions were formed after 24 h of milling. The hcp solid solution has a lower value of the crystallite size and a higher degree of microstrains and dislocation density than the fcc solid solution. For prolonged milling (48 h), plastic deformations introduce large amounts of stacking faults in the hcp structure leading to the reverse hcp-fcc transformation of the Co(Cr) solid solution. The kinetic parameters n = 0.81 and k = 0.11, obtained using the Johnson-Mehl-Avrami formalism, correspond to diffusion mechanisms through interfaces and dislocations.
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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 Badji Mokhtar, B.P. 12</s1><s2>23000 Annaba</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 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="02"><s1>Département de Fisica, Universitat de Girona, Campus Montilivi</s1><s2>Girona 17071</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="Escoda, L" sort="Escoda, L" uniqKey="Escoda L" first="L." last="Escoda">L. Escoda</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Département de Fisica, Universitat de Girona, Campus Montilivi</s1><s2>Girona 17071</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></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">10-0176842</idno><date when="2010">2010</date><idno type="stanalyst">PASCAL 10-0176842 INIST</idno><idno type="RBID">Pascal:10-0176842</idno><idno type="wicri:Area/PascalFrancis/Corpus">000098</idno><idno type="wicri:Area/PascalFrancis/Curation">000197</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000092</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000092</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Formation study of the ball-milled Cr<sub>20</sub>Co<sub>80</sub> alloy</title><author><name sortKey="Louidi, S" sort="Louidi, S" uniqKey="Louidi S" first="S." last="Louidi">S. 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 Badji Mokhtar, B.P. 12</s1><s2>23000 Annaba</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 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 Badji Mokhtar, B.P. 12</s1><s2>23000 Annaba</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 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="02"><s1>Département de Fisica, Universitat de Girona, Campus Montilivi</s1><s2>Girona 17071</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="Escoda, L" sort="Escoda, L" uniqKey="Escoda L" first="L." last="Escoda">L. Escoda</name><affiliation wicri:level="2"><inist:fA14 i1="02"><s1>Département de Fisica, Universitat de Girona, Campus Montilivi</s1><s2>Girona 17071</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></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="2010">2010</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 alloy</term><term>Cobalt alloy</term><term>Dislocation density</term><term>FCC lattices</term><term>HCP lattices</term><term>Kinetics</term><term>Microstructure</term><term>Planetary mill</term><term>Powder metallurgy</term><term>Stacking fault</term><term>Stacking fault density</term><term>Structure modification</term><term>Transition metal alloy</term><term>X ray diffraction</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Broyeur boulet</term><term>Broyeur satellite</term><term>Modification structure</term><term>Diffraction RX</term><term>Microstructure</term><term>Densité défaut empilement</term><term>Métallurgie poudre</term><term>Densité dislocation</term><term>Défaut empilement</term><term>Cinétique</term><term>Cobalt alliage</term><term>Réseau cubique face centrée</term><term>Réseau hexagonal compact</term><term>Chrome alliage</term><term>Métal transition alliage</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The ball milling of blended chromium and cobalt powders was carried out in a planetary mill in order to obtain a nanostructured Cr<sub>20</sub>Co<sub>80</sub> alloy. The structural modifications at different stages of the ball milling are investigated with X-ray diffraction. Several microstructure parameters such as the crystallite size, microstrains, stacking faults, dislocation density and phase fractions are determined. As the milling proceeded, the chromium peaks disappeared progressively indicating the dissolution of the chromium atoms into the cobalt matrix. Disordered hcp-Co(Cr) and fcc-Co(Cr) solid solutions were formed after 24 h of milling. The hcp solid solution has a lower value of the crystallite size and a higher degree of microstrains and dislocation density than the fcc solid solution. For prolonged milling (48 h), plastic deformations introduce large amounts of stacking faults in the hcp structure leading to the reverse hcp-fcc transformation of the Co(Cr) solid solution. The kinetic parameters n = 0.81 and k = 0.11, obtained using the Johnson-Mehl-Avrami formalism, correspond to diffusion mechanisms through interfaces and dislocations.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0925-8388</s0></fA01><fA03 i2="1"><s0>J. alloys compd.</s0></fA03><fA05><s2>493</s2></fA05><fA06><s2>1-2</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Formation study of the ball-milled Cr<sub>20</sub>Co<sub>80</sub> alloy</s1></fA08><fA11 i1="01" i2="1"><s1>LOUIDI (S.)</s1></fA11><fA11 i1="02" i2="1"><s1>BENTAYEB (F.-Z.)</s1></fA11><fA11 i1="03" i2="1"><s1>SUNOL (J. J.)</s1></fA11><fA11 i1="04" i2="1"><s1>ESCODA (L.)</s1></fA11><fA14 i1="01"><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></fA14><fA14 i1="02"><s1>Département de Fisica, Universitat de Girona, Campus Montilivi</s1><s2>Girona 17071</s2><s3>ESP</s3><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA20><s1>110-115</s1></fA20><fA21><s1>2010</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>1151</s2><s5>354000181884260320</s5></fA43><fA44><s0>0000</s0><s1>© 2010 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>33 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>10-0176842</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Journal of alloys and compounds</s0></fA64><fA66 i1="01"><s0>CHE</s0></fA66><fC01 i1="01" l="ENG"><s0>The ball milling of blended chromium and cobalt powders was carried out in a planetary mill in order to obtain a nanostructured Cr<sub>20</sub>Co<sub>80</sub> alloy. The structural modifications at different stages of the ball milling are investigated with X-ray diffraction. Several microstructure parameters such as the crystallite size, microstrains, stacking faults, dislocation density and phase fractions are determined. As the milling proceeded, the chromium peaks disappeared progressively indicating the dissolution of the chromium atoms into the cobalt matrix. Disordered hcp-Co(Cr) and fcc-Co(Cr) solid solutions were formed after 24 h of milling. The hcp solid solution has a lower value of the crystallite size and a higher degree of microstrains and dislocation density than the fcc solid solution. For prolonged milling (48 h), plastic deformations introduce large amounts of stacking faults in the hcp structure leading to the reverse hcp-fcc transformation of the Co(Cr) solid solution. 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Louidi</name></noRegion><name sortKey="Bentayeb, F Z" sort="Bentayeb, F Z" uniqKey="Bentayeb F" first="F.-Z." last="Bentayeb">F.-Z. Bentayeb</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></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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