Abstract Effect of Sm2O3 addition and two-step sintering of Ceria Stabilized Zirconia (CSZ) on microstructure and mechanical properties were investigated in the present work. Samaria doped CSZ (SmCSZ) nanopowders were prepared by co-precipitation synthesis from their respective nitrate salts. Synthesized powders were calcined at 1000 °C for 2 h and then compacted to ϕ10 mm pellets using a uniaxial hydraulic press. Single step & two-step sintering methods were used to sinter the compacted pellets. Powders and sintered pellets were characterized for phase and microstructure using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) technique. Rietveld method was used for quantification of obtained phases. The hardness of the sintered samples was evaluated by Vicker's hardness tester, and toughness was estimated by indentation fracture toughness method. Samples sintered using two-step sintering method shown optimum hardness and toughness (up to 1288 HV10 and 5.37 MPa m1/2) values compared to conventionally sintered samples because of reduced grain size.

中文翻译：

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Sm2O3掺杂氧化铈稳定氧化锆的两步烧结

摘要 本工作研究了添加 Sm2O3 和二步烧结氧化铈稳定氧化锆 (CSZ) 对微观结构和机械性能的影响。撒玛利亚掺杂的 CSZ (SmCSZ) 纳米粉体是由它们各自的硝酸盐通过共沉淀合成制备的。合成的粉末在 1000°C 下煅烧 2 小时，然后使用单轴液压机压制成 φ10 毫米的颗粒。使用单步和两步烧结方法来烧结压实的球团。使用 X 射线衍射 (XRD) 和扫描电子显微镜 (SEM) 技术对粉末和烧结丸粒的相和微观结构进行表征。Rietveld 方法用于量化所获得的相。烧结试样的硬度通过维氏硬度计进行评价，韧度采用压痕断裂韧度法估算。与传统烧结样品相比，由于晶粒尺寸减小，使用两步烧结方法烧结的样品显示出最佳硬度和韧性（高达 1288 HV10 和 5.37 MPa m1/2）值。