原位Al2O3pl/Ce-TZP复合材料的显微结构与力学性能

研究了原位生长Al2O3片晶/Ce-TZP复合材料的显微结构与力学性能。结果表明，只要烧结温度适当，引入原位Al2O3片晶可同时提高复合材料的强度和断裂韧性。在所研究的范围内，以含15vol%Al2O3的复合材料有最好的强韧化效果，而增韧效果又比增强效果明显。如果烧结温度过低或者Al2O3含量过高，则复合材料的力学性能反而下降。原位Al2O3片晶/Ce-TZP复合材料的强韧化机理为应力诱导相变增韧和片晶增韧，两者起到协同增韧的作用。

Microstructure and Mechanical Properties of in Situ Al2O3pl/Ce-TZP Composites

The microstructure and mechanical properties of in situ Al₂O₃ platelet/Ce-TZP composites were studied. The results indicate that both the strength and fracture toughness of the composites can be increased by introduction of in situ Al₂O₃ platelets if sintered at a suitable temperature. The reinforcement is most effective for the specimens containing 15 vol% Al₂O₃ while the toughening effects are better than the strengthening. The mechanical properties of the composites decrease if the sintering temperature is too low or the Al₂O₃ content is too high. The toughening mechanisms in the composites include transformation toughening and platelet reinforcement. They are enhanced by their co-operation.