Study on Mg-PSZ ceramics doped with Y2O3 and CeO2

Mg-PSZ ceramics doped with Y2O3 and CeO2 was prepared using traditional processing method. The fine-grain PSZ ceramics( d(c) less than or equal to 10 mu m) sintered at low temperature(less than or equal to 1550 degrees C) was obtained by means of composition design. The effects of co-stabilization of Y2O3, CeO2 and annealing at 1100 degrees C on material composition, microstructure and mechanical properties were studied. The results show that Y2O3 and CeO2 during annealing at 1100 degrees C can inhibit subeutectoid decomposition reaction effectively, and optimize nucleation and growth of t-ZrO2 precipitates in c-ZrO2 matrix phase. The materials show transgranular and intergranular fracture characteristics, and exhibit better mechanical properties owing to the cooperative effect of stress-induced transformation toughening and microcrack toughening.