Structural, microstructural and magnetic properties of nanocomposite isotropic Sm(Co(bal)Fe(0.1)M(y)Zr(0.04)B(0.04))(7.5) ribbons with M = Ni, Cu and y=0.09 and 0.12

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dc.contributor.authorMakridis, S. S.en
dc.contributor.authorPanagiotopoulos, I.en
dc.contributor.authorTsiaoussis, I.en
dc.contributor.authorFrangis, N.en
dc.contributor.authorPavlidou, E.en
dc.contributor.authorChrisafis, K.en
dc.contributor.authorPapathanasiou, G. F.en
dc.contributor.authorEfthimiadis, K.en
dc.contributor.authorHadjipanayis, G. C.en
dc.contributor.authorNiarchos, D.en
dc.date.accessioned2015-11-24T17:38:42Z
dc.date.available2015-11-24T17:38:42Z
dc.identifier.issn0304-8853-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/14534
dc.rightsDefault Licence-
dc.subjectmelt spinningen
dc.subjectmicrostructureen
dc.subjectrare-earth permanent magneten
dc.subjectcoercivityen
dc.subjectpermanent-magnetsen
dc.subjecthigh coercivityen
dc.subjectspunen
dc.subjectalloysen
dc.subjectsubstitutionen
dc.subjectfeen
dc.titleStructural, microstructural and magnetic properties of nanocomposite isotropic Sm(Co(bal)Fe(0.1)M(y)Zr(0.04)B(0.04))(7.5) ribbons with M = Ni, Cu and y=0.09 and 0.12en
heal.abstractIn boron-substituted melt-spun Sm(Co,Fe,Cu,Zr)(7.5)-type alloys a nanocomposite microstructure and high coercivities in both as-spun and short-time annealed ribbons can be obtained. In the present study three different compositions, namely Sm(Co(0.73)Fe(0.1)Cu(0.09)Zr(0.04)B(0.04))(7.5), Sm(Co(0.70)Fe(0.1)Cu(0.12)Zr(0.04)B(0.04))(7.5) and Sm(Co(0.70)Fe(0.1)Ni(0.12)Zr(0.04)B(0.04))(7.5) have been examined in order to investigate the influence of composition on the magnetic properties and the microstructure. Melt-spun ribbons have been obtained and annealing has been followed under argon atmosphere for 30-75 min at 600-870 degrees C. For the as-spun ribbons the TbCu(7)-type of structure and fcc-Co as a secondary phase have been identified in the X-ray diffraction patterns. For the annealed ribbons above 700 degrees C the 1:7 phase transforms into 2:17 and 1:5 phases. The TEM studies have shown a homogeneous nanocrystalline microstructure with average grain size of 30-80 nm. Coercivity values of 15-27 kOe have been obtained from hysteresis loops traced in non-saturating fields. The coercivity decreases with temperature, but it is sufficiently large to maintain values higher than 5 kOe at 380 degrees C. (C) 2008 Elsevier B.V. All rights reserved.en
heal.accesscampus-
heal.fullTextAvailabilityTRUE-
heal.identifier.primaryDOI 10.1016/j.jmmm.2008.04.122-
heal.identifier.secondary<Go to ISI>://000257205900006-
heal.journalNameJournal of Magnetism and Magnetic Materialsen
heal.journalTypepeer reviewed-
heal.languageen-
heal.publicationDate2008-
heal.publisherElsevieren
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικώνel
heal.typejournalArticle-
heal.type.elΆρθρο Περιοδικούel
heal.type.enJournal articleen

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