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dc.contributor.authorFlorêncio, Odila
dc.contributor.authorSilva Jr, Paulo Sergio
dc.contributor.authorBotta Filho, Walter José
dc.contributor.authorGrandini, Carlos Roberto [UNESP]
dc.date.accessioned2021-07-14T10:47:45Z
dc.date.available2021-07-14T10:47:45Z
dc.date.issued2003-12
dc.identifierhttp://dx.doi.org/10.1590/S1516-14392003000400020
dc.identifier.citationMaterials Research. São Carlos, SP, Brazil: ABM, ABC, ABPol, v. 6, n. 4, p. 541-544, 2003.
dc.identifier.issn1516-1439
dc.identifier.issn1980-5373
dc.identifier.urihttp://hdl.handle.net/11449/212958
dc.description.abstractMeasurements of internal friction as a function of temperature were performed in samples of Nb containing different amounts of substitutional (Zr) and interstitial (O, N) solutes. These data were resolved using the method of successive subtraction, into a series of constituent Debye peaks corresponding to different interactions. For each relaxation process we obtained the height (Q-1max) and temperature (Tp) of the peak, the activation energy (E) and the relaxation time (t0). The height, shape and temperature of the peaks depend on the concentration of interstitial and substitutional elements. With the addition of substitutional solute one can observed interactions between the two types of solutes (substitutional and interstitial), showing that the random distribution of the interstitial atoms was affected by presence of substitutional atoms. The peaks observed were associated with matrix-interstitial (Nb-O, Nb-N) and substitutional-interstitial (Zr-O) interaction processes.en
dc.format.extent541-544
dc.language.isoeng
dc.publisherABM, ABC, ABPol
dc.relation.ispartofMaterials Research
dc.sourceSciELO
dc.subjectniobiumen
dc.subjectniobium alloysen
dc.subjectinterstitial elementsen
dc.subjectinternal frictionen
dc.titleEffect of impurities on mechanical relaxation in niobiumen
dc.typeArtigo
dc.contributor.institutionUniversidade Federal de São Carlos
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationUniversidade Federal de São Carlos, Departamento de Física
dc.description.affiliationUNESP, Departamento de Física
dc.description.affiliationUniversidade Federal de São Carlos, Departamento de Engenharia de Materiais
dc.description.affiliationUnespUNESP, Departamento de Física
dc.identifier.doi10.1590/S1516-14392003000400020
dc.identifier.scieloS1516-14392003000400020
dc.rights.accessRightsAcesso aberto
dc.identifier.fileS1516-14392003000400020.pdf
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