【摘要】 用电铸法制备了Ni-CeO2纳米复合材料,考察了镀液中CeO2纳米颗粒浓度、阴极电流密度、镀液温度对纳米复合材料中CeO2含量及纳米复合材料显微硬度的影响,对纳米复合材料的表面形貌进行了分析。结果表明,制备Ni-CeO2纳米复合材料的最佳工艺条件为纳米颗粒添加量为40g/L,阴极电流密度为4A/dm2,镀液温度为55℃,pH值为3.8;在最佳工艺条件下可得到CeO2质量分数为8.5%的Ni-CeO2纳米复合材料,其表面光滑平整、组织均匀致密,且显微硬度HV达到598,较纯镍有显著提高。更多还原

【Abstract】 Ni-CeO₂ nano-composites were prepared by an electro-forming method. Effects of CeO₂ particle concentration in electrolyte, cathode current density and electrolyte temperature on CeO₂ content in the composites and the micro-hardness of the composites have been investigated, and the surface morphology of the nano-composites has been observed. It is found that the optimized processing parameters for preparing Ni-CeO₂ nano-composites can be obtained including CeO₂ particle concentration of 40 g/L, cathode current density of 4 A/dm² and electrolyte temperature of 55 ℃ as well as pH value of 3.8. The nano-composites containing 8.5% CeO₂ content were prepared with the optimized processing parameters, which have smooth surface morphology and compact microstructure, and exhibit higher micro-hardness than those of the pure Ti, reaching 598 HV.更多还原