超声电铸镍-氧化铈纳米复合材料的研究

在电铸工艺中引入超声波,制备了Ni-CeO2纳米复合材料,考察了超声波对电铸速率、电流效率的影响,并对纳米复合材料的表面形貌和显微硬度进行了分析和测试。结果表明,超声波可以提高电铸速率和电流效率,使CeO2纳米颗粒更加均匀地弥散于纳米复合材料中。与无超声下制备的Ni-CeO2纳米复合材料相比,超声作用下制备的纳米复合材料的晶粒得到细化,其组织更加均匀致密、表面更平整,纳米复合材料的显微硬度明显提高。

Study of Ultrasound Electroforming of Ni-CeO2 Nanocomposites

Ni-CeO2 nanoeomposites were obtained by using electroforming process with ultrasound irradiation. Effects of the ultrasound on electroforming velocity and current efficiency were evaluated. The surface morphology of the Ni-CeO2 nanocomposites was analyzed. The microhardness of the nanocomposites was also tested. The results indicate that, ultrasound can improve the electroforming velocity and current efficiency. Meanwhile, CeO2 nanoparticals disperse more uniform in the nanocomposites due to ultrasound irradiation. The craystalline grain of Ni-CeO2 nanocomposite prepared with ultrasonic irradiation is further refined, and the Ni-CeO2 nanocomposite has more compact and uniform microsturcture, smoother morphology, compared to the nanocomposite prepared without ultrasound irradiation. The microhardness of the nanocomposite prepared with ultrasound irradiation is greatly enhanced.