Thermal and structural characterization of Fe-Nb-B alloys prepared by mechanical alloying
dc.contributor.author
dc.date.accessioned
2016-09-22T10:32:05Z
dc.date.available
2016-09-22T10:32:05Z
dc.date.issued
2004-07-01
dc.identifier.issn
0921-5093
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dc.description.abstract
Three nanocrystalline alloys, Fe94-xNb6Bx (x=9,14,20), were synthesized from elemental powders in a planetary high-energy ball mill. The microstructure and thermal properties of the milled powders were characterized by X-ray diffraction (XRD), transmission Mössbauer spectroscopy (TMS), scanning electron microscopy (SEM) with microanalysis, induction-coupled plasma (ICP) spectroscopy and differential scanning calorimetry (DSC).Slight contamination from milling tools and atmosphere were detected. After 80h of milling the nanocrystallites size was about 50nm. The lattice parameter increases with increasing milling time and boron content. Furthermore, the thermal stability of the nanocrystalline phase increases with increasing boron concentration. Apparent activation energies were obtained: 360±35, 305±30 and 324±35kJmol-1, respectively (associated with grain growth process). Slight differences were detected in the Mössbauer analysis. Nevertheless, in boron rich alloys increases of about 150% of the magnetic field values were obtained between 18.5 and 24T
dc.description.sponsorship
Financial support from MICYT (project nos. MAT2000-0388 and MAT2001-0957) and DURSI (SGR2001-00190)
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
CICYT/PN 2000-2003/MAT2000-0388-C02-02
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Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.msea.2003.10.194
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© Materials Science and Engineering A, 2004, vol. 375-377, p. 874-880
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Articles publicats (D-F)
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Tots els drets reservats
dc.subject
dc.title
Thermal and structural characterization of Fe-Nb-B alloys prepared by mechanical alloying
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
001338
dc.contributor.funder