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    兰明明, 薛玉君, 段明德, 马伟, 李济顺. 脉冲电铸制备纳米CeO2增强镍基复合材料[J]. 机械工程材料, 2009, 33(1): 33-36.
    引用本文: 兰明明, 薛玉君, 段明德, 马伟, 李济顺. 脉冲电铸制备纳米CeO2增强镍基复合材料[J]. 机械工程材料, 2009, 33(1): 33-36.
    shu
    LAN Ming-ming, XUE Yu-jun, DUAN Ming-de, MA Wei, LI Ji-shun. Nano-CeO2/Ni Composites Prepared by Pulse Electroforming[J]. Materials and Mechanical Engineering, 2009, 33(1): 33-36.
    Citation: LAN Ming-ming, XUE Yu-jun, DUAN Ming-de, MA Wei, LI Ji-shun. Nano-CeO2/Ni Composites Prepared by Pulse Electroforming[J]. Materials and Mechanical Engineering, 2009, 33(1): 33-36.
    shu

    脉冲电铸制备纳米CeO2增强镍基复合材料

    Nano-CeO2/Ni Composites Prepared by Pulse Electroforming

      摘要
    • 摘要: 用脉冲电铸技术制备了纳米CeO2增强镍基复合材料,研究了镀液中纳米CeO2颗粒添加量、阴极平均电流密度、占空比及脉冲频率对电铸复合材料中CeO2含量的影响,并对复合材料的显微硬度和表面形貌进行了分析.结果表明:在CeO2添加量40 g·L-1、阴极平均电流密度4 A·dm-2、占空比0.2、脉冲频率1 000 Hz的条件下,电铸复合材料中CeO2含量最高为2.98%;其显微硬度为484 HV,较脉冲纯镍的323 HV有明显提高;与直流电铸纳米CeO2增强复合材料相比,脉冲电铸制备的复合材料表面更平整,组织更致密,晶粒更细小,且减少了纳米CeO2颗粒的团聚现象.

       

      Abstract: Ni/nano-CeO2 composites were prepared by pulse electroforming.Effects of concentration of nano-CeO2 particles in the electrolyte,pulse average current density,duty cycle and pulse frequency on the content of CeO2 in the Ni/nano-CeO2 composites were evaluated.The surface morphology and microhardness of composites were also analyzed.The results indicated that under the conditions of CeO2 concentration of 40 g·L-1 in the electrolyte ,pulse average current density of 4 A·dm-2,duty cycle of 0.2 and pulse frequency of 1 000 Hz,the composites containing 2.98% CeO2 particles had much higher microhardness (484 HV) than that of the pulse pure Ni(323 HV).The Ni/nano-CeO2 composites prepared by pulse electroforming had smoother morphology,more compact microstructure,further refined grains than that of the Ni/nano-CeO2 composites prepared by direct electroforming and improved agglomeration of CeO2 particles.

       

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