Microstructure characterization of ball‐milled Ni50Co50 alloy by Rietveld method
Identifieur interne : 000A91 ( Istex/Corpus ); précédent : 000A90; suivant : 000A92Microstructure characterization of ball‐milled Ni50Co50 alloy by Rietveld method
Auteurs : Nadia Loudjani ; Nadia Bensebaa ; Safia Alleg ; Chaffia Djebbari ; Jean Marc GrenecheSource :
- physica status solidi (a) [ 1862-6300 ] ; 2011-09.
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Abstract
A nanostructured Ni50Co50 mixture was prepared by high‐energy ball milling in a planetary ball mill (Frisch P7) under an argon atmosphere. Scanning electron microscopy and X‐ray diffraction (XRD) have been used to study the morphology of the powder particles, microstructure, and structure evolution. Detailed analysis of the XRD patterns was performed by the MAUD program, which is based on the Rietveld method. It reveals the complete vanishing of the Co peaks after 3 h of milling, indicating the allotropic transformation of Co from hcp to fcc structure. The reciprocal dissolution of the elemental Ni and Co powders leads to the formation of a heterogeneous solid solution with two structures: fcc‐Ni(Co) and fcc‐Co(Ni) with relative fractions of about 76 and 20%, respectively, after 24 h of milling. Microstructural parameters such as lattice parameter, crystallite size, microstrains, dislocation density, and stacking faults have been deduced from the best Rietveld refinements. The formation kinetics of nanostructured Ni50Co50 mixture can be described by a lower Avrami parameter, n, close to 0.34.
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DOI: 10.1002/pssa.201026723
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ISTEX:C36552363FD403E7A304FE37901A4CEDC33987A7Le document en format XML
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Scanning electron microscopy and X‐ray diffraction (XRD) have been used to study the morphology of the powder particles, microstructure, and structure evolution. Detailed analysis of the XRD patterns was performed by the MAUD program, which is based on the Rietveld method. It reveals the complete vanishing of the Co peaks after 3 h of milling, indicating the allotropic transformation of Co from hcp to fcc structure. The reciprocal dissolution of the elemental Ni and Co powders leads to the formation of a heterogeneous solid solution with two structures: fcc‐Ni(Co) and fcc‐Co(Ni) with relative fractions of about 76 and 20%, respectively, after 24 h of milling. Microstructural parameters such as lattice parameter, crystallite size, microstrains, dislocation density, and stacking faults have been deduced from the best Rietveld refinements. The formation kinetics of nanostructured Ni50Co50 mixture can be described by a lower Avrami parameter, n, close to 0.34.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Nadia Loudjani</name><affiliations><json:string>Laboratoire de Magnétisme et de Spectroscopie des Solides, Département de Physique, Faculté des Sciences, Université Badji Mokhtar B. P. 12, 23000 Annaba, Algérie, France</json:string></affiliations></json:item><json:item><name>Nadia Bensebaa</name><affiliations><json:string>Laboratoire de Magnétisme et de Spectroscopie des Solides, Département de Physique, Faculté des Sciences, Université Badji Mokhtar B. P. 12, 23000 Annaba, Algérie, France</json:string></affiliations></json:item><json:item><name>Safia Alleg</name><affiliations><json:string>Laboratoire de Magnétisme et de Spectroscopie des Solides, Département de Physique, Faculté des Sciences, Université Badji Mokhtar B. 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Scanning electron microscopy and X‐ray diffraction (XRD) have been used to study the morphology of the powder particles, microstructure, and structure evolution. Detailed analysis of the XRD patterns was performed by the MAUD program, which is based on the Rietveld method. It reveals the complete vanishing of the Co peaks after 3 h of milling, indicating the allotropic transformation of Co from hcp to fcc structure. The reciprocal dissolution of the elemental Ni and Co powders leads to the formation of a heterogeneous solid solution with two structures: fcc‐Ni(Co) and fcc‐Co(Ni) with relative fractions of about 76 and 20%, respectively, after 24 h of milling. Microstructural parameters such as lattice parameter, crystallite size, microstrains, dislocation density, and stacking faults have been deduced from the best Rietveld refinements. 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P. 12, 23000 Annaba, Algérie, France</affiliation></author><author xml:id="author-5"><persName><forename type="first">Jean Marc</forename><surname>Greneche</surname></persName><affiliation>Laboratoire de Physique de l'Etat Condensé – UMR 6087, Université du Maine, Faculté des Sciences, 72085 Le Mans Cedex 9, France</affiliation></author></analytic><monogr><title level="j">physica status solidi (a)</title><title level="j" type="abbrev">Phys. 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The formation kinetics of nanostructured Ni50Co50 mixture can be described by a lower Avrami parameter, n, close to 0.34.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>alloys</term></item><item><term>ball milling</term></item><item><term>cobalt</term></item><item><term>nanostructured materials</term></item><item><term>nickel</term></item><item><term>X‐ray diffraction</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Original Paper</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2010-11-28">Received</change><change when="2011-04-19">Registration</change><change when="2011-09">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/C36552363FD403E7A304FE37901A4CEDC33987A7/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>WILEY‐VCH Verlag</publisherName><publisherLoc>Berlin</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1862-6319</doi><issn type="print">1862-6300</issn><issn type="electronic">1862-6319</issn><idGroup><id type="product" value="PSSA"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="PHYSICA STATUS SOLIDI A">physica status solidi (a)</title><title type="tocForm">physica status solidi a</title><title type="short">Phys. 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P. 12, 23000 Annaba, Algérie, France</unparsedAffiliation></affiliation><affiliation xml:id="af2" countryCode="FR" type="organization"><unparsedAffiliation>Laboratoire de Physique de l'Etat Condensé – UMR 6087, Université du Maine, Faculté des Sciences, 72085 Le Mans Cedex 9, France</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en" type="author"><keyword xml:id="kwd1">alloys</keyword><keyword xml:id="kwd2">ball milling</keyword><keyword xml:id="kwd3">cobalt</keyword><keyword xml:id="kwd4">nanostructured materials</keyword><keyword xml:id="kwd5">nickel</keyword><keyword xml:id="kwd6">X‐ray diffraction</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>A nanostructured Ni<sub>50</sub>Co<sub>50</sub> mixture was prepared by high‐energy ball milling in a planetary ball mill (Frisch P7) under an argon atmosphere. Scanning electron microscopy and X‐ray diffraction (XRD) have been used to study the morphology of the powder particles, microstructure, and structure evolution. Detailed analysis of the XRD patterns was performed by the MAUD program, which is based on the Rietveld method. It reveals the complete vanishing of the Co peaks after 3 h of milling, indicating the allotropic transformation of Co from hcp to fcc structure. The reciprocal dissolution of the elemental Ni and Co powders leads to the formation of a heterogeneous solid solution with two structures: fcc‐Ni(Co) and fcc‐Co(Ni) with relative fractions of about 76 and 20%, respectively, after 24 h of milling. Microstructural parameters such as lattice parameter, crystallite size, microstrains, dislocation density, and stacking faults have been deduced from the best Rietveld refinements. The formation kinetics of nanostructured Ni<sub>50</sub>Co<sub>50</sub> mixture can be described by a lower Avrami parameter, <i>n,</i> close to 0.34.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Microstructure characterization of ball‐milled Ni50Co50 alloy by Rietveld method</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Microstructure characterization of ball‐milled Ni50Co50 alloy</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Microstructure characterization of ball‐milled Ni50Co50 alloy by Rietveld method</title></titleInfo><name type="personal"><namePart type="given">Nadia</namePart><namePart type="family">Loudjani</namePart><affiliation>Laboratoire de Magnétisme et de Spectroscopie des Solides, Département de Physique, Faculté des Sciences, Université Badji Mokhtar B. P. 12, 23000 Annaba, Algérie, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Nadia</namePart><namePart type="family">Bensebaa</namePart><affiliation>Laboratoire de Magnétisme et de Spectroscopie des Solides, Département de Physique, Faculté des Sciences, Université Badji Mokhtar B. P. 12, 23000 Annaba, Algérie, France</affiliation><description>Correspondence: Phone: 0021338875399, Fax: 0021338871712</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Safia</namePart><namePart type="family">Alleg</namePart><affiliation>Laboratoire de Magnétisme et de Spectroscopie des Solides, Département de Physique, Faculté des Sciences, Université Badji Mokhtar B. P. 12, 23000 Annaba, Algérie, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Chaffia</namePart><namePart type="family">Djebbari</namePart><affiliation>Laboratoire de Magnétisme et de Spectroscopie des Solides, Département de Physique, Faculté des Sciences, Université Badji Mokhtar B. P. 12, 23000 Annaba, Algérie, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jean Marc</namePart><namePart type="family">Greneche</namePart><affiliation>Laboratoire de Physique de l'Etat Condensé – UMR 6087, Université du Maine, Faculté des Sciences, 72085 Le Mans Cedex 9, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>WILEY‐VCH Verlag</publisher><place><placeTerm type="text">Berlin</placeTerm></place><dateIssued encoding="w3cdtf">2011-09</dateIssued><dateCaptured encoding="w3cdtf">2010-11-28</dateCaptured><dateValid encoding="w3cdtf">2011-04-19</dateValid><copyrightDate encoding="w3cdtf">2011</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">11</extent><extent unit="references">36</extent><extent unit="words">3944</extent></physicalDescription><abstract lang="en">A nanostructured Ni50Co50 mixture was prepared by high‐energy ball milling in a planetary ball mill (Frisch P7) under an argon atmosphere. Scanning electron microscopy and X‐ray diffraction (XRD) have been used to study the morphology of the powder particles, microstructure, and structure evolution. Detailed analysis of the XRD patterns was performed by the MAUD program, which is based on the Rietveld method. It reveals the complete vanishing of the Co peaks after 3 h of milling, indicating the allotropic transformation of Co from hcp to fcc structure. The reciprocal dissolution of the elemental Ni and Co powders leads to the formation of a heterogeneous solid solution with two structures: fcc‐Ni(Co) and fcc‐Co(Ni) with relative fractions of about 76 and 20%, respectively, after 24 h of milling. Microstructural parameters such as lattice parameter, crystallite size, microstrains, dislocation density, and stacking faults have been deduced from the best Rietveld refinements. The formation kinetics of nanostructured Ni50Co50 mixture can be described by a lower Avrami parameter, n, close to 0.34.</abstract><subject lang="en"><genre>keywords</genre><topic>alloys</topic><topic>ball milling</topic><topic>cobalt</topic><topic>nanostructured materials</topic><topic>nickel</topic><topic>X‐ray diffraction</topic></subject><relatedItem type="host"><titleInfo><title>physica status solidi (a)</title></titleInfo><titleInfo type="abbreviated"><title>Phys. Status Solidi A</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Original Paper</topic></subject><identifier type="ISSN">1862-6300</identifier><identifier type="eISSN">1862-6319</identifier><identifier type="DOI">10.1002/(ISSN)1862-6319</identifier><identifier type="PublisherID">PSSA</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>208</number></detail><detail type="issue"><caption>no.</caption><number>9</number></detail><extent unit="pages"><start>2124</start><end>2129</end><total>6</total></extent></part></relatedItem><identifier type="istex">C36552363FD403E7A304FE37901A4CEDC33987A7</identifier><identifier type="DOI">10.1002/pssa.201026723</identifier><identifier type="ArticleID">PSSA201026723</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2011 WILEY‐VCH Verlag GmbH & Co. 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