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dc.contributor.authorSimba, Bruno Galvão [UNESP]
dc.contributor.authorDos Santos, Claudinei
dc.contributor.authorStrecker, Kurt
dc.contributor.authorDe Almeida, Antonio Alves [UNESP]
dc.contributor.authorAdabo, Gelson Luis [UNESP]
dc.date.accessioned2018-12-11T17:29:11Z
dc.date.available2018-12-11T17:29:11Z
dc.date.issued2016-07-01
dc.identifierhttp://dx.doi.org/10.1590/1980-5373-MR-2015-0426
dc.identifier.citationMaterials Research, v. 19, n. 4, p. 829-833, 2016.
dc.identifier.issn1516-1439
dc.identifier.urihttp://hdl.handle.net/11449/178185
dc.description.abstractZrO2(Y2O3)-based ceramics are widely used as biomaterials due to high fracture toughness, resulting from the tetragonal-monoclinic phase transformation in which the ceramic is submitted during crack propagation. In this context, studies involving the possibility of optimization of the tetragonal phase are important for the properties improvement of this ceramic. This study investigated the recovery of tetragonal phase from a previously transformed ZrO2(3 mol% Y2O3) ceramic. Zirconia samples were sintered at 1450 °C, at 1530 °C - 2 h and at 1600 °C - 4 h, in order to obtain materials with distinct microstructural features. The sintered samples were characterized by relative density, X-ray diffraction and scanning electron microscopy. Samples sintered at 1450 °C, 1530 °C - 2 h and 1600 °C - 4 h, presented relative densities of 94.2, 99.6 and 99.7% with grains size averages of 0.28, 0.49 and 1.31 μm, respectively. All samples were submitted to milling to induce the tetragonal-monoclinic phase transformation presenting 5, 50 and 65 vol% of monoclinic phase. Subsequently, heat treatments between 400 °C and 1200 °C were conducted to retransform monoclinic in tetragonal phase. It has been found that the smaller the grain size after sintering, the lower the necessary annealing temperatures for fully recovering of tetragonal phase. Annealing temperatures of 950, 1100 and 1200 °C were sufficient to recover almost fully the tetragonal phase.en
dc.format.extent829-833
dc.language.isoeng
dc.relation.ispartofMaterials Research
dc.sourceScopus
dc.subjectMicrostructure
dc.subjectPhase transformation
dc.subjectSintering
dc.subjectZrO2(Y2O3) ceramics
dc.titleRecovery of tetragonal phase from previously transformed Y-TZPen
dc.typeArtigo
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade do Estado do Rio de Janeiro (UERJ)
dc.contributor.institutionUniversidade Federal de Sergipe (UFS)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationUniversidade de São Paulo - USP Escola de Engenharia de Lorena - EEL, Pólo Urbo-Industrial, s/n, Gleba AI-6
dc.description.affiliationUniversidade do Estado do Rio de Janeiro - UERJ Faculdade de Tecnologia - FAT, Rod. Presidente Dutra
dc.description.affiliationUniversidade Federal de São João del-Rei - UFSJ Campus Sto Antônio, Praça Frei Orlando, 170, Centro
dc.description.affiliationUniversidade Estadual Paulista - UNESP Faculdade de Odontologia de Araraquara - FOAr, R. Humaitá, 1680
dc.description.affiliationUniversidade Estadual Paulista - UNESP Faculdade de Engenharia de Guaratinguetá - FEG, Av. Ariberto Pereira da Cunha, 333, Portal das Colinas
dc.description.affiliationUnespUniversidade Estadual Paulista - UNESP Faculdade de Odontologia de Araraquara - FOAr, R. Humaitá, 1680
dc.description.affiliationUnespUniversidade Estadual Paulista - UNESP Faculdade de Engenharia de Guaratinguetá - FEG, Av. Ariberto Pereira da Cunha, 333, Portal das Colinas
dc.identifier.doi10.1590/1980-5373-MR-2015-0426
dc.identifier.scieloS1516-14392016000400829
dc.rights.accessRightsAcesso aberto
dc.identifier.scopus2-s2.0-84981164660
dc.identifier.fileS1516-14392016000400829.pdf
dc.relation.ispartofsjr0,398
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