INVESTIGADORES
RENDTORFF BIRRER Nicolas Maximiliano
artículos
Título:
RELATION BETWEEN MECHANICAL AND TEXTURAL PROPERTIES OF DENSE MATERIALS OF TETRAGONAL AND CUBIC ZIRCONIA
Autor/es:
S. GOMEZ; G. SUAREZ; N. RENDTORFF; E. AGLIETTI
Revista:
SCIENCE OF SINTERING
Editorial:
INT INST SCIENCE SINTERING (I I S S)
Referencias:
Lugar: Belgrado; Año: 2015
ISSN:
0350-820X
Resumen:
In the current paper we present a study of the sinterability of two zirconia (ZrO2)nanopowders with different content of yttrium oxide (Y2O3) 3 and 8 % tetragonal and cubiczirconia, respectively. After sintering between 900-1500ºC, the samples were characterizedin terms of their density and porosity using Archimedes technique. Their grain size wasevaluated using scanning electron microscope (SEM). Vickers hardness and fracturetoughness (KIC) were measured by the indentation method. The results showed that poresare almost eliminated at sintering temperatures higher than 1400ºC and grain size is largerdue to the agglomerates formed as a result of grain growth. Vickers hardness evaluated at1400ºC sintering temperature is greater than that obtained at 1500ºC due to the graingrowth produced at this temperature. In addition, we show a correlation between Vickershardness and the porosity, obtained by evaluating empirical and theoretical models.
