Preparation of porous ceria doped tetragonal zirconia ceramics by capsule free hot isostatic pressing

AbstractNormal sintering and capsule free hot isostatic pressing (HIPing) of 12CeO2–88ZrO2 powder were carried out at 1100–1200°C using different starting powders. Porous ceramics of this composition with ∼35%open porosity, micropore diameters of ∼23 nm, and narrow pore size distributions were fabricated by capsule free hot isostatic pressing at 1100°C using the powders crystallised in methanol followed by supercritical drying. The porosity increased with decrease in HIPing temperature and was accompanied by a steady decrease in fracture strength.