10Ce-TZP base composites with 2.5, 5, 10 and 15 wt% alumina were fabricated by colloidal processing from slurries with 41 vol% solid load in order to investigate the effects of alumina in the final composites aging and mechanical properties. Alumina particle surface charge was modified with the addition of 3 wt% of PAA. The resulting composites have high relative densities (∼ 99%) and homogeneous alumina distribution. The microstructure is refined by the alumina addition resulting in a tetragonal-monoclinic microstructure with monoclinic phase content diminishing with alumina concentration down to 16 vol% in 10Ce-15Al₂O₃ composite. From the study of hydrothermal aging in autoclave steam at 134 °C and 2 bar pressure, it is concluded that all composites have very high resistance to low temperature degradation. At the same time, mechanical properties were investigated by measuring hardness, elastic modulus, strength and t-m transformation around Vickers and spherical indentations. The t-m transformation extension around imprints prevents the formation of Vickers indentations cracks, which indicates a high level of damage tolerance for all compositions. In particular, for 10Ce-15Al₂O₃ composite, an excellent combination of hardness (∼10 GPa), strength (∼1400 MPa), damage tolerance, and resistance to low temperature degradation is achieved.

为了研究氧化铝在最终复合材料的老化和机械性能中的作用，采用胶体工艺从固含量为41％（体积）的浆料中制备了具有2.5％，5％，10％和15％（重量）氧化铝的10Ce-TZP基复合材料。通过添加3重量％的PAA来改性氧化铝颗粒的表面电荷。所得复合材料具有较高的相对密度（约99％）和均匀的氧化铝分布。通过添加氧化铝细化了微观结构，从而形成了单斜相含量逐渐减少的四方单斜微结构，在10Ce-15Al ₂ O _3中氧化铝浓度降低至16 vol％综合。根据对134°C和2 bar压力下高压釜蒸汽的水热老化的研究，可以得出结论，所有复合材料都具有很高的抗低温降解性。同时，通过测量维氏硬度和球形压痕周围的硬度，弹性模量，强度和tm转换来研究机械性能。压印周围的tm变形扩展防止了维氏压痕裂纹的形成，这表明所有组合物都具有很高的抗损伤性。特别是，对于10Ce-15Al ₂ O ₃复合材料，可以实现硬度（〜10 GPa），强度（〜1400 MPa），耐损伤性和耐低温降解性的极好组合。