Obtenção de nanocompósitos de alumina-zircônia para aplicação como biomaterial / Obtaining of alumina-zirconia nanocomposites for application as biomaterial

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

26/05/2011

RESUMO

Alumina ceramic of high density and high purity are used as biomaterials due to the combination of excellent corrosion resistance, good biocompatibility, high wear resistance and moderate strength. However, their low fracture toughness limits its range of applications. One possibility to improve the properties of these materials may be in the use of nanometric inclusions of ZrO2 in Al2O3 matrix. The aim of this study was to characterize and ceramic matrix nanocomposites with alumina inclusions of nanometric zirconia, varying the amount, 5, 10, 15, 30 and 50% by volume of zirconia in alumina, seeking improvements in mechanical properties and wear this and using the same material as a biomaterial. For this, commercial ZrO2 nano-sized particles were added into alumina matrix in different proportions using a ball mill. The samples of pure alumina and alumina-zirconia nanocomposites were characterized physical, microstructural and mechanical. These results showed the efficiency of the process used, obtaining a good dispersion of zirconia particles in alumina matrix. The inclusion of up to 15% of nano-zirconia in alumina matrix caused an increase in the values of diametrical compression. Regarding the values of fracture toughness, with increasing percentage of the inclusions could be better results.

ASSUNTO(S)

biomaterial biomaterial

ACESSO AO ARTIGO

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