The effect of two-step sintering on the fabrication and properties of Sialon-ZrN composites has been studied. In the present work, the results showed that composites sintered at different T2 temperature had similar phase assemblage and morphologies. Composites sintered at a higher T2 temperature presented greater relative density and smaller open porosity, and had greater hardness and fracture toughness, achieving a highest hardness of 16.9 ± 0.3 GPa for 20 wt% ZrN and greatest fracture toughness of 5.4 ± 0.3 MPam^1/2 for 40 wt% ZrN. In comparison with one-step sintering, composites fabricated by two-step sintering had smaller grain size and more homogenous microstructure, resulting in greater hardness without sacrificing fracture toughness. The electrical properties of the composites were similar regardless of sintering techniques.

研究了两步烧结对Sialon-ZrN复合材料的制备和性能的影响。在目前的工作中，结果表明，在不同的T2温度下烧结的复合材料具有相似的相组成和形貌。在较高的T2温度下烧结的复合材料具有较高的相对密度和较小的开孔孔隙率，并且具有较高的硬度和断裂韧性，对于20 wt％的ZrN，最高硬度为16.9±0.3 GPa，最大断裂韧性为5.4±0.3 MPam ^1/2加入40 wt％的ZrN。与一步烧结相比，通过两步烧结制备的复合材料具有较小的晶粒尺寸和更均匀的微观结构，从而在不牺牲断裂韧性的情况下具有更高的硬度。无论采用何种烧结技术，复合材料的电性能均相似。