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Magnesia-doped partially stability zirconia ceramics containing 10% MgO (Mg-PSZ) that was alloyed with different concentration of CeO2 were sintered at 1550～1600 ℃ for 2 h in air and then aged at 1500 ℃ for different time. The obtained results show that addition of CeO2 increase the stability of tetragonal/cubic zirconia and activate the densification process. A microstructure of a fine grain matrix with random distributions of net-shape grains was obtained while samples contained 4%～10% CeO2 sintered at 1580 ℃ for 2 h. With the increasing of ageing time, tetragonal zirconia precipitates in c-ZrO2 solid solution were interweaved into nanoporous microstructure that might be benefitial to the improvement of fracture toughness at elevated temperature.
Magnesia-doped partially stabilized zirconia ceramics containing 10% MgO (Mg-PSZ) that was alloyed with different concentrations of CeO2 were sintered at 1550 ~ 1600 ° C for 2 h in air and then aged at 1500 ° C for different time. The obtained results show that addition of CeO2 increase the stability of tetragonal / cubic zirconia and activate the densification process. A microstructure of a fine grain matrix with random distributions of net-shape grains was obtained while samples contained 4% to 10% CeO2 sintered at 1580 ° C for 2 h. With the increasing of aging time, tetragonal zirconia precipitates in c-ZrO2 solid solution were interweaved into nanoporous microstructure that might be benefitial to the improvement of fracture toughness at elevated temperature.