本文采用热分解法制备Al2O3微粉、化学共沉淀法制备(Y，Ce)—ZrO2超细粉，通过适当工艺制备出ZrO2／Al2O3复合陶瓷。经研究发现，添加Al2O3，可抑制ZrO2晶粒的长大，提高基体的强度和韧性。当Al2O3含量达到30%(质量分数)时，复合陶瓷的抗弯强度为986MPa，断裂韧性为13.7MPa*m1／2。材料性能的提高可归结为Al2O3颗粒的弥散增韧和ZrO2陶瓷的相变增韧叠加作用的结果。
In this paper， ZrO2/Al2O3 ceramic composites were prepared with Al2O3 powder made by thermal decomposition and (Y,Ce)-ZrO2 by coprecipitation as raw materials by means of appropriate technique.It was found that the grain growth of zirconia was inhibited with the introduction of alumina,which resulted in higher strength and toughness of the ceramics.When the addition of alumina was 30wt%,the bending strength and fracture toughness of the composites were 986MPa and 13.7MPa*m1／2 respectively.The mechanical property was improved by the dispersion toughening of alumina grain and the phase transformation toughening of zirconia.
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