【摘要】 采用超声波辅助脉冲电沉积法制备Ni-CeO2纳米复合材料,用正交试验法评价了CeO2纳米颗粒添加量、平均电流密度、脉冲占空比、脉冲频率、超声波频率和功率、搅拌速率等工艺参数对复合材料中纳米颗粒共沉积量的影响,并对纳米复合材料的显微硬度和表面形貌进行了分析。结果表明,CeO2纳米颗粒添加量对复合材料中CeO2共沉积量的影响最大。利用超声波的空化效应,选取适当的脉冲电沉积工艺参数,可以获得高硬度的Ni-CeO2纳米复合材料;超声-脉冲电沉积制备的Ni-CeO纳米复合材料晶粒细小且分布均匀。更多还原

【Abstract】 Ni-CeO2 nanocomposites were prepared by pulse electrodeposition in an ultrasonic field. Effects of processing parameters, such as concentration of CeO2 nano-particles in the electrolyte, pulse average current density, pulse duty cycle, pulse frequency, ultrasonic frequency and power as well as stirring rate, on CeO2 nano-particles content in the Ni-CeO2 nano-composites were evaluated by orthogonal experiment. The surface morphology and microstructure and micro-hardness of Ni-CeO2 nano-composites were also analyzed. The results show that co-deposited CeO2 content in the composites is markedly affected by the CeO2 particle concentration in the electrolyte. The Ni-CeO2 nanocomposites with high micro-hardness can be prepared by means of cavitation effects of ultrasonic wave and selecting suitable processing parameters of pulse electrodeposition, in which uniformly distributed disperoids can be observed.更多还原