Y_2O_3,CeO_2复合稳定剂对TZP性能的影响

THE EFFECT OF Y_2O_3 AND CeO_2 COMPOSITE ADDITIVES ON MECHANICAL PROPERTY OF TZP

用复合稳定剂Ｙ２Ｏ３和ＣｅＯ２，制备出了综合性能优异的（Ｙ，Ｃｅ）－ＴＺＰ．性能测试和ＸＲＤ分析表明：在Ｙ２Ｏ３∶ＣｅＯ２＝０．６∶０．４ｍｏｌ附近，复合稳定的效果大于单一稳定剂的作用效果．ｃ－ＺｒＯ２的存在对性能不利，这是由于烧结时ｔ－ＺｒＯ２晶粒向ｃ－ＺｒＯ２相变时，ｃ轴收缩的张应力诱发了裂纹．ｔ－ＺｒＯ２的稳定性太强也会降低性能，因为应力诱导可相变的ｔ－ＺＯ２减少．

(Y,Ce)TZP ceramics with better mechanical property were obtained by adding the composite additives of Y_2O_3 and CeO_2. The results of the mechenical test and XRD analysis showed that the stabilized effect of the composite additives near molar ratio Y_2O_3∶CeO_2=0.6∶0.4 is better than that of individual. The existence of the cZrO_2 is harmful to mechanical property of TZP, for the tension stress caused by caxis contraction during the transformation of the tZrO_2 to cZrO_2 introduces the cracks in TZP on heating. Excessive stabilization of tZrO_2 decreases the mechanical properties of the TZP, for the amount of the transformed tZrO_2 reduces.