Study on Mg-PSZ Ceramics Doped with Y2O3 and CeO2
来源期刊：JOURNAL OF RARE EARTHS2000年第2期
论文作者：TAN Jia-qi YUAN Qi-ming MA Ya-lu
Key words：rare earths; Mg-PSZ ceramic; doping; Y2O3; CeO2; mechanical property;
Abstract: Mg-PSZ ceramics doped with Y2O3 and CeO2 was prepared using traditional processing method. The fine-grain PSZ ceramics(dc≤10 μm) sintered at low temperature(≤1550 ℃) was obtained by means of composition design. The effects of co-stabilization of Y2O3, CeO2 and annealing at 1100 ℃ on material composition, microstructure and mechanical properties were studied. The results show that Y2O3 and CeO2 during annealing at 1100 ℃ 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.
TAN Jia-qi1，YUAN Qi-ming1，MA Ya-lu2
(1.Department of Materials Science and Technology, Tianjin University, Tianjin 300072, China;
2.Department of Chemistry, Tianjin University, Tianjin 300072, China)
Abstract:Mg-PSZ ceramics doped with Y2O3 and CeO2 was prepared using traditional processing method. The fine-grain PSZ ceramics(dc≤10 μm) sintered at low temperature(≤1550 ℃) was obtained by means of composition design. The effects of co-stabilization of Y2O3, CeO2 and annealing at 1100 ℃ on material composition, microstructure and mechanical properties were studied. The results show that Y2O3 and CeO2 during annealing at 1100 ℃ 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.
Key words:rare earths; Mg-PSZ ceramic; doping; Y2O3; CeO2; mechanical property;
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