The objective of this work was to study two-step sintering as a means of controlling the microstructure of coarse Al₂O₃ matrix composites containing submicrometric and nanometric inclusions of ZrO₂ ranging from 0–30 wt. % by weight based on commercially available powders and evaluate its hydrothermal degradation as function of a water vapour pressure and its mechanical properties. The results showed that two-step sintering allowed a more efficient microstructural control than single-step sintering, resulting in good mechanical properties. The highest flexural strength was achieved for ZTA samples sintered in two-stage sintering conditions TSS2 with T1 = 1560 °C for 3 h, T2 = 1460 °C for 8 h. The studied composites showed good resistance to hydrothermal degradation compared to composites sintered in single step sintering conditions.

这项工作的目的是研究两步烧结作为控制含有亚微米和纳米级 ZrO ₂夹杂物的粗 Al ₂ O ₃基复合材料微观结构的一种手段。范围从 0-30 重量。基于市售粉末的重量百分比，并评估其水热降解作为水蒸气压及其机械性能的函数。结果表明，两步烧结比单步烧结可以更有效地控制微观结构，从而获得良好的机械性能。ZTA 样品在 T1 = 1560 °C 持续 3 小时，T2 = 1460 °C 持续 8 小时的两阶段烧结条件 TSS2 中烧结时获得了最高的弯曲强度。与在单步烧结条件下烧结的复合材料相比，所研究的复合材料显示出良好的抗水热降解性能。