用共沉淀法合成Gd2Ti2O7纳米粉体,经真空烧结制备不同ZrO2 (3Y)含量的Gd2Ti2O7/ZrO2(3Y)陶瓷.用XRD、SEM和力学性能试验等测试手段研究样品的物相、形貌和力学性能.结果表明:Gd2Ti2O7/ZrO2 (3Y)陶瓷的力学性能随ZrO2 (3Y)含量增加显著提高,ZrO2 (3Y)含量为90vol％时,样品的维氏硬度、抗弯强度和断裂韧性最大值分别达到20.95 GPa、199.21 MPa和8.17 MPa·m1/2.其原因是ZrO2 (3Y)固溶导致晶粒尺寸减小,过饱和析出ZrO2 (3Y)的颗粒弥散增韧,以及ZrO2(3Y)应力诱导相变增韧作用.
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