Aging behavior of commercial and synthesized dental Y-TZP ceramics
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Yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) is used for dental
prosthodontics, however, it can present accelerated tetragonal to monoclinic phase transformation in
oral environment. The aim of this study was to compare the behavior of a Y-TZP synthesized in
laboratory by the coprecipitation method to a commercial Y-TZP, after hydrothermal aging in
pressurized reactor (150oC/ 35 hours). The discs were sintered at 1520oC for two hours. The
kinetics curve of phase transformation was determined through the data collect by XRD
diffractograms treated by the Rietveld method. The experimental and commercial control groups
did not present monoclinic phase. After 35 hours of aging, the experimental group presented 69% of
monoclinic phase compared to 67% for the commercial group. Scanning electron microscopy and
atomic force microscopy images suggested that the commercial group presented heterogeneity of
grain size and that the experimental group was more homogeneous. All groups presented superficial
degradation process
Como referenciar
ARATA, ANELYSE; CAMPOS, TIAGO M.B.; MACHADO, JOAO P.B.; YOSHITO, WALTER K.; USSUI, VALTER; LIMA, NELSON B. de; TANGO, RUBENS N.; LAZAR, DOLORES R.R. Aging behavior of commercial and synthesized dental Y-TZP ceramics. Materials Science Forum, v. 820, p. 297-302, 2015. DOI: 10.4028/www.scientific.net/MSF.820.297. Disponível em: http://repositorio.ipen.br/handle/123456789/26759. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.