Silica infiltration in partially stabilized zirconia: Effect of hydrothermal aging on mechanical properties

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorAeronautical Technology Institute (ITA)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorSao Francisco University (USF)-
Autor(es): dc.contributorDivision of Prosthodontics-
Autor(es): dc.contributorUniversidade Federal de Sergipe (UFS)-
Autor(es): dc.creatorCampos, T. M.B.-
Autor(es): dc.creatorRamos, N. C. [UNESP]-
Autor(es): dc.creatorMatos, J. D.M. [UNESP]-
Autor(es): dc.creatorThim, G. P.-
Autor(es): dc.creatorSouza, R. O.A.-
Autor(es): dc.creatorBottino, M. A.-
Autor(es): dc.creatorValandro, L. F.-
Autor(es): dc.creatorMelo, R. M.-
Data de aceite: dc.date.accessioned2022-02-22T00:30:10Z-
Data de disponibilização: dc.date.available2022-02-22T00:30:10Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jmbbm.2020.103774-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/200313-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/200313-
Descrição: dc.descriptionIt aimed to evaluate if silica infiltration might influence the hydrothermal degradation of zirconia by determining: the phases formed, hardness, microstructure, and flexural strength of a 3Y-TZP. Yttria partially stabilized zirconia discs (1.2 mm thickness x 13 mm diameter) (InCeram YZ, Vita Zanhfabrik) were produced and assigned into 6 groups, considering 2 factors: silica infiltration in 2 levels (as-sintered or infiltration) and hydrothermal aging (LTD-Low Temperature Degradation) in 3 levels (baseline, aging at 132 °C for 35 h or 140 h). All the groups were subjected to the biaxial flexural test (n = 30), and Vickers hardness (n = 42). Weibull analysis was performed to determine the Weibull moduli (m) and characteristic strenghts (σ0). The specimens were characterized by scanning electron microscopy (SEM) to evaluate microstructure and X-ray diffraction (XRD) for phases percentages determination. For as-sintered condition: there was saturation of the amount of monoclinic zirconia after 35 h of hydrothermal aging, with 66% of monoclinic zirconia formed on the surface. LTD generated a progressive reduction in hardness over time; flexural strength was increased by the 35-h treatment (baseline: 974 MPa; 35 h: 1161.5 MPa), but, the 140 °C treatment was deleterious (698.5 MPa). On the other hand, the infiltrated specimens had an increase in the amount of cubic zirconia on the surface and showed 26% (35h) and 31% (140h) of monoclinic zirconia after the hydrothermal aging ; the strength was kept unaltered after LTD–35 h (935.9 MPa) and an increase was observed after LTD–140 h (1033.6 MPa); the hardness values had no statistically significant changes during the process. Thus, one can concludes that the silica infiltration can prevent the decrease in the mechanical properties due to the LTD on partially stabilized zirconia materials.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionDepartment of Physics Aeronautical Technology Institute (ITA)-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Institute of Science and Technology of Sao Jose Dos Campos Sao Paulo State University (UNESP)-
Descrição: dc.descriptionCollege of Dentistry Sao Francisco University (USF), Bragança Paulista-
Descrição: dc.descriptionDepartment of Prosthodontics Federal University of Rio Grande Do Norte Department of Dentistry Division of Prosthodontics-
Descrição: dc.descriptionDepartment of Restorative Dentistry School of Dentistry Federal University of Santa Maria (UFSM)-
Descrição: dc.descriptionDepartment of Dental Materials and Prosthodontics Institute of Science and Technology of Sao Jose Dos Campos Sao Paulo State University (UNESP)-
Descrição: dc.descriptionCNPq: 156600/2018-8-
Descrição: dc.descriptionCNPq: 408932/2016-3-
Idioma: dc.languageen-
Relação: dc.relationJournal of the Mechanical Behavior of Biomedical Materials-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCeramics-
Palavras-chave: dc.subjectFracture strength-
Palavras-chave: dc.subjectTemperature-
Palavras-chave: dc.subjectY-TZP ceramic-
Título: dc.titleSilica infiltration in partially stabilized zirconia: Effect of hydrothermal aging on mechanical properties-
Tipo de arquivo: dc.typelivro digital-
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