Properties of Alumina–Zirconia Composites Prepared by Slip-Casting Method

The effect of zirconia concentrations on the properties of alumina–zirconia composites prepared by slip-casting method was studied. Varying amounts of yttria-tetragonal zirconia (Y-TZP) ranging up to 90 vol.% were added in alumina and sintered at 1450 °C. The sintered composites were then characterised in terms of bulk density, microstructure, Vickers hardness and bending strength. The calculated prepared bulk density of the green cast composites correlated well with the experimental values. The results showed that sintered bulk density improved with the increase of zirconia content. It was also revealed that the addition of about 60 vol.% of zirconia had contributed to maximum hardness and strength, up to 12 GPa and 708 MPa, respectively.