Publicação: Tetragonal to monoclinic phase transition observed during Zr anodisation
dc.contributor.author | Trivinho-Strixino, Francisco | |
dc.contributor.author | Da Silva, Donizete X. | |
dc.contributor.author | Paiva-Santos, Carlos O. [UNESP] | |
dc.contributor.author | Pereira, Ernesto C. | |
dc.contributor.institution | Universidade Federal de São Carlos (UFSCar) | |
dc.contributor.institution | Universidade Estadual Paulista (Unesp) | |
dc.contributor.institution | Universidade Federal de Tocantins | |
dc.date.accessioned | 2014-05-27T11:27:27Z | |
dc.date.available | 2014-05-27T11:27:27Z | |
dc.date.issued | 2013-01-01 | |
dc.description.abstract | Plasma electrolytic oxidation (PEO) is a coating procedure that utilises anodic oxidation in aqueous electrolytes above the dielectric breakdown voltage to produce oxide coatings that have specific properties. These conditions facilitate oxide formation under localised high temperatures and pressures that originate from short-lived microdischarges at sites over the metal surface and have fast oxide volume expansion. Anodic ZrO2 films were prepared by subjecting metallic zirconium to PEO in acid solutions (H2C 2O4 and H3PO4) using a galvanostatic DC regime. The ZrO2 microstructure was investigated in films that were prepared at different charge densities. During the anodic breakdown, an important change in the amplitude of the voltage oscillations at a specific charge density was observed (i.e., the transition charge density (Q T)). We verified that this transition charge is a monotonic function of both the current density and temperature applied during the anodisation, which indicated that Q T is an intrinsic response of this system. The oxide morphology and microstructure were characterised using SEM and X-ray diffraction experiments (XRD) techniques. X-ray diffraction analysis revealed that the change in voltage oscillation was correlated with oxide microstructure changes during the breakdown process. © 2012 Springer-Verlag Berlin Heidelberg. | en |
dc.description.affiliation | Departamento de Física, Química e Matemática Universidade Federal de São Carlos, São Carlos SP | |
dc.description.affiliation | Laboratório Computacional de Análises Cristalográ ficas e Cristalinas Depto de Físico-Química Universidade Estadual Paulista, Araraquara SP | |
dc.description.affiliation | Departamento de Química Universidade Federal de São Carlos, Rod. Washington Luis Km 235, Cx 676, São Carlos SP | |
dc.description.affiliation | Universidade Federal de Tocantins, Palmas, TO | |
dc.description.affiliationUnesp | Laboratório Computacional de Análises Cristalográ ficas e Cristalinas Depto de Físico-Química Universidade Estadual Paulista, Araraquara SP | |
dc.format.extent | 191-199 | |
dc.identifier | http://dx.doi.org/10.1007/s10008-012-1883-4 | |
dc.identifier.citation | Journal of Solid State Electrochemistry, v. 17, n. 1, p. 191-199, 2013. | |
dc.identifier.doi | 10.1007/s10008-012-1883-4 | |
dc.identifier.issn | 1432-8488 | |
dc.identifier.scopus | 2-s2.0-84872299505 | |
dc.identifier.uri | http://hdl.handle.net/11449/74124 | |
dc.identifier.wos | WOS:000313046100021 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Solid State Electrochemistry | |
dc.relation.ispartofjcr | 2.509 | |
dc.relation.ispartofsjr | 0,661 | |
dc.rights.accessRights | Acesso restrito | |
dc.source | Scopus | |
dc.subject | Anodic breakdown | |
dc.subject | Anodic films | |
dc.subject | Microstructure | |
dc.subject | Phase transformation | |
dc.subject | Plasma electrolytic oxidation (PEO) | |
dc.subject | Valve metals | |
dc.subject | ZrO2 | |
dc.subject | Plasma electrolytic oxidation | |
dc.subject | Valve metal | |
dc.subject | Anodic oxidation | |
dc.subject | Charge density | |
dc.subject | Electric breakdown | |
dc.subject | Electrolysis | |
dc.subject | Phase transitions | |
dc.subject | Protective coatings | |
dc.subject | X ray diffraction analysis | |
dc.subject | Zirconium | |
dc.subject | Zirconium alloys | |
dc.subject | Film preparation | |
dc.title | Tetragonal to monoclinic phase transition observed during Zr anodisation | en |
dc.type | Artigo | |
dcterms.license | http://www.springer.com/open+access/authors+rights | |
dspace.entity.type | Publication | |
unesp.campus | Universidade Estadual Paulista (UNESP), Instituto de Química, Araraquara | pt |
unesp.department | Físico-Química - IQAR | pt |