通过控制初始粉体的晶粒尺寸和成型素坯的烧结条件,制备出了晶粒尺寸在100～500nm范围的Y-TZP/Al2O3纳米陶瓷复合材料;采用扫描电镜、X射线衍射仪分析了其显微结构和物相组成,并用压痕法测定了显微硬度.结果表明:该复合陶瓷主要由t-ZrO2相组成,同时含有少量α-Al2O3;其显微硬度存在显著的压痕尺寸效应,且硬度与晶粒尺寸的平方根成反比.
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