PHASE STABILITY OF 3Y-TSZ CERAMICS AFTER DIFFERENT SURFACE TREATMENTS

CALAMBAS PULGARIN; MARÍA P. ALBANO; LILIANA B. GARRIDO

MATERIALS SCIENCE FORUM

Trans Tech Publications

Año: 2015 p. 330 - 334

0255-5476

The ability of zirconia ceramics to develop a bioactive surface is of great importance for biomedical applications. For that, it is also required to control phase stability ( i.e. to avoid the tetragonal to monoclinic phase transformation) of zirconia surfaces in order to impart a high mechanical resistance. In this work, the phase stability of dense 3 mol% yttria stabilized-zirconia (3Y-TSZ) ceramics after acid and hydrothermal treatments was examined. The zirconia bodies were prepared by slip casting from well dispersed 52 vol% suspensions of 3Y-TSZ, and subsequently sintered to 1300-1500 °C. The effect of various synthesis parameters and 0.25 wt% alumina doping on the phase transformation after acid and hydrothermal treatments was semi-quantitatively evaluated by XRD. The microstructure of the surface layers on the sintered materials was examined by SEM-EDX.