Effect of bioglass additions on the sintering of Y-TZP bioceramics


Autoria(s): HABIBE, A. F.; MAEDA, L. D.; SOUZA, R. C.; BARBOZA, M. J. R.; DAGUANO, J. K. M. F.; ROGERO, S. O.; SANTOS, C.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

18/10/2012

18/10/2012

2009

Resumo

The objective of this work was to evaluate the influence of bioglass additions on the sintering and mechanical properties of yttria-stabilized zirconia ceramics, Y-TZP Samples containing different bioglass additions, varying between 0 and 30 wt.%, were cold uniaxial pressed at 80 MPa and sintered in air at 1200 degrees C or 1300 degrees C for 120 min. Sintered samples were characterized by X-ray Diffractometry and Scanning Electron Microscopy. Hardness and fracture toughness were determined using Vickers indentation method. As a preliminary biological evaluation, in vitro cytotoxicity tests by Neutral Red Uptake method (using mouse connective tissue cells, NCTC clone L929 from ATCC bank) were realized to determine the cytotoxicity level of ZrO(2)-bioglass ceramics. The increasing of bioglass amount leads to the decreasing of relative density due to martensitic (tetragonal-monoclinic) transformation during cooling of the sintered samples. Y-TZP samples sintered at 1300 degrees C containing 5 wt.% of bioglass presented the best results. with high relative density, hardness and fracture toughness of 11.3 GPa and 6.1 MPa m(1/2), respectively. Furthermore, the un-cytotoxic behavior was observed in all sintering conditions and bioglass amounts used in this study. (C) 2009 Elsevier B.V. All rights reserved.

FAPESP[04/04386-1]

FAPESP[06/50510-1]

Identificador

Materials science and engineering. C, Biomimetic materials, sensors and systems, v.29, n.6, p.1959-1964, 2009

0928-4931

http://producao.usp.br/handle/BDPI/17601

10.1016/j.msec.2009.03.006

http://dx.doi.org/10.1016/j.msec.2009.03.006

Idioma(s)

eng

Publicador

ELSEVIER SCIENCE BV

Relação

Materials science and engineering. C, Biomimetic materials, sensors and systems

Direitos

restrictedAccess

Copyright ELSEVIER SCIENCE BV

Palavras-Chave #Bioceramics #Sintering #ZrO(2) #Bioglass #Characterization #MECHANICAL-PROPERTIES #RESIDUAL-STRESS #MODEL ANALYSIS #CERAMICS #ZIRCONIA #TOUGHNESS #BIOCOMPATIBILITY #COMPOSITES #STABILITY #STRENGTH #Materials Science, Biomaterials
Tipo

article

original article

publishedVersion