Microstructural Characteristics of 3Y-TZP Ceramics and Their Effects on the Flexural Strength

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dc.contributor.authorAlves, Manuel Fellipe Rodrigues Pais
dc.contributor.authorde Campos, Leonardo Queiroz Bueno
dc.contributor.authorSimba, Bruno Galvão [UNESP]
dc.contributor.authorda Silva, Cosme Roberto Moreira
dc.contributor.authorStrecker, Kurt
dc.contributor.authordos Santos, Claudinei
dc.contributor.institutionUniversidade do Estado do Rio de Janeiro (UERJ)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade de Brasília (UnB)
dc.contributor.institutionUniversidade Federal de Sergipe (UFS)
dc.contributor.institutionUniversidade Federal Fluminense (UFF)
dc.date.accessioned2023-07-29T12:43:42Z
dc.date.available2023-07-29T12:43:42Z
dc.date.issued2022-12-01
dc.description.abstractThis work evaluates the effects of grain growth and tetragonality of the t-ZrO2 phase on the mechanical properties of 3Y-TZP ceramics. Samples were sintered at 1475 °C for 2 h, and at 1600 °C for 2, 12, or 24 h. After sintering, the tetragonal ZrO2 polytypes t and t′ were observed under all sintering conditions, while a residual content of monoclinic ZrO2 was detected in samples sintered at 1600 °C for 24 h. The average grain size was found to vary from 0.65 ± 0.10 to 2.20 ± 0.35 μm. Moreover, zirconia ceramics sintered at 1475 °C for 2 h exhibit higher flexural strength (1210 ± 85 MPa), while samples sintered at 1600 °C for 24 h exhibit the lowest flexural strength (910 ± 90 MPa). These results were related to the progressive formation of Y3+-rich grains (t′-ZrO2) due to the grain boundary segregation-induced phase (GBSIPT) mechanism. Due to the high stabilizer concentration in the solid solution, these grains present lower tetragonality, being highly stable at room temperature. Consequently, the observed strength reduction of samples sintered at 1600 °C for 24 h is related to the presence of the t′-ZrO2 phase, which is less prompt to the phase transformation toughening process, limiting shielding zones’ effectiveness at the crack tip.en
dc.description.affiliationFaculdade de Tecnologia de Resende Universidade do Estado do Rio de Janeiro UERJ-FAT, Rodovia Presidente Dutra, km 298, RJ
dc.description.affiliationFaculdade de Engenharia de Guaratinguetá Universidade Estadual Paulista UNESP/FEG, Av. Ariberto Pereira da Cunha, 333, Portal das Colinas, SP
dc.description.affiliationFaculdade de Tecnologia Universidade de Brasília UNB, Asa Norte, DF
dc.description.affiliationDepartment of Mechanical Engineering Universidade Federal de São João Del’Rei—UFSJ, Pça Frei Orlando 170, MG
dc.description.affiliationEscola de Engenharia Industrial Metalúrgica de Volta Redonda (EEIMVR) Universidade Federal Fluminense (UFF), Av. Trabalhadores, 420, Vila Santa Cecília, RJ
dc.description.affiliationUnespFaculdade de Engenharia de Guaratinguetá Universidade Estadual Paulista UNESP/FEG, Av. Ariberto Pereira da Cunha, 333, Portal das Colinas, SP
dc.format.extent798-813
dc.identifierhttp://dx.doi.org/10.3390/ceramics5040058
dc.identifier.citationCeramics, v. 5, n. 4, p. 798-813, 2022.
dc.identifier.doi10.3390/ceramics5040058
dc.identifier.issn2571-6131
dc.identifier.scopus2-s2.0-85144673957
dc.identifier.urihttp://hdl.handle.net/11449/246536
dc.language.isoeng
dc.relation.ispartofCeramics
dc.sourceScopus
dc.subjectmechanical properties
dc.subjectmicrostructure
dc.subjectphase transformation
dc.subjecttetragonality
dc.subjectY-TZP
dc.titleMicrostructural Characteristics of 3Y-TZP Ceramics and Their Effects on the Flexural Strengthen
dc.typeArtigo
unesp.author.orcid0000-0001-7671-5684[1]
unesp.author.orcid0000-0001-6301-6446[4]
unesp.author.orcid0000-0002-9398-0639[6]

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