Influence of Heat Treatment on the Anelastic Properties of MgB(2)

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dc.contributor.authorda Silva, Marcos Ribeiro [UNESP]
dc.contributor.authorGrandini, Carlos Roberto [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:26:23Z
dc.date.available2014-05-20T13:26:23Z
dc.date.issued2010-01-01
dc.description.abstractThe discovery of the superconductivity of MgB(2) was of great importance, because this material is one of the few known binary compounds and has one of the highest critical temperatures (39 degrees K). As MgB(2) is a granular compound, it is fundamentally important to understand the mechanisms of the interaction of the defects and the crystalline lattice, in addition to the eventual processes involving the grain boundaries that compose the material. In this sense, the mechanical spectroscopy measurements constitute a powerful tool for this study, because through them we can obtain important information about phase transitions, the behavior of interstitial or substitutional elements, dislocations, grain boundaries, diffusion, instabilities, and other imperfections of the lattice. For this paper, the samples were prepared using the PIT method and were characterized by density, X-ray diffraction, scanning electron microscopy, electric resistivity, magnetization, and mechanical spectroscopy. The samples were measured in their as-cast condition and after an ultra-high-vacuum heat treatment. The results showed complex spectra, in which were identified relaxation processes due to dislocation movement, interaction among interstitial elements and dislocations, auto-diffusion, and movement of grain boundaries. Some of these processes disappeared with the heat treatment.en
dc.description.affiliationUNESP Univ Estadual Paulista, Lab Biomat & Anelasticidade, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationUnespUNESP Univ Estadual Paulista, Lab Biomat & Anelasticidade, BR-17033360 Bauru, SP, Brazil
dc.format.extent832-836
dc.identifierhttp://dx.doi.org/10.4028/www.scientific.net/MSF.660-661.832
dc.identifier.citationAdvanced Powder Technology Vii. Stafa-zurich: Trans Tech Publications Ltd, v. 660-661, p. 832-836, 2010.
dc.identifier.doi10.4028/www.scientific.net/MSF.660-661.832
dc.identifier.issn0255-5476
dc.identifier.lattes2949983867418338
dc.identifier.orcid0000-0002-3336-309X
dc.identifier.urihttp://hdl.handle.net/11449/8502
dc.identifier.wosWOS:000295548800133
dc.language.isoeng
dc.publisherTrans Tech Publications Ltd
dc.relation.ispartofAdvanced Powder Technology Vii
dc.relation.ispartofsjr0,180
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectMgB(2)en
dc.subjectAnelasticityen
dc.subjectHeat Treatmentsen
dc.subjectSuperconductivityen
dc.titleInfluence of Heat Treatment on the Anelastic Properties of MgB(2)en
dc.typeTrabalho apresentado em evento
dcterms.rightsHolderTrans Tech Publications Ltd
unesp.author.lattes2949983867418338[2]
unesp.author.orcid0000-0002-3336-309X[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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