Influence of the zirconia content on the densification, thermal behaviour and properties of reinforced Zircon Zirconia (ZrSiO4─m- ZrO2) ceramic composites

N. RENDTORFF; G. SUAREZ; YOSHIO SAKKA; E. AGLIETTI

La Plata

Conferencia; HK 2010 - Humboldt Kolleg; 2011

IFLP (CONICET), UNLP

In many industrial applications, components are required to work in extremely hard conditions, particularly at very high temperatures for long times. For these applications, new ceramic matrix composites have been designed, with both micro and nano-sized reinforcing particles, located at inter or intra-granular positions, this can improve mechanical and thermomechanical performances as well as strongly reduce creep rate. Zirconia containing ceramics have attracted great attention to industrial applications in oxygen pumps, sensors, fuel cells, and thermal barrier coatings due to their excellent electrical, thermal, and mechanical properties. Many attempts are in progress to develop biphasic and tri-phasic systems or even tetra-phasic systems. Particularly much interest is still being carried out in dispersed zirconia containing ceramic composites with different contents of different types of ZrO2 grains. In this work a series of zircon zirconia (ZrSiO4-ZrO2) ceramic composites have been obtained by slip casting of concentrated aqueous dispersions in alumina porous molds and presureless sintering.