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
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.
纳米CeO2
镍基复合材料
表面形貌
pulse electroforming
nano-CeO2
Ni-based composite
surface morphology
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.
中图分类号 TQ153.4 TB333
所属栏目 新材料 新工艺
基金项目 国家自然科学基金资助项目(50775067);河南省高校创新人才基金资助项目(2005-126)
收稿日期 2007/12/7
修改稿日期 2008/4/25
网络出版日期
作者单位点击查看
备注兰明明(1984-),男,河南郑州人,硕士研究生.
引用该论文: LAN Ming-ming,XUE Yu-jun,DUAN Ming-de,MA Wei,LI Ji-shun. Nano-CeO2/Ni Composites Prepared by Pulse Electroforming[J]. Materials for mechancial engineering, 2009, 33(1): 33～36
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
被引情况:
【1】申晨,薛玉君,库祥臣,刘义,李济顺, "超声波对Ni-ZrO2纳米复合镀层微观结构和显微硬度的影响",机械工程材料 34, 80-83(2010)
【2】刘磊,赵玉涛,贾志宏,陈刚,轩动华, "磁化学原位合成制备ZrB2p/A356复合材料及其表征",机械工程材料 34, 29-32(2010)
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