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《Materials for Mechanical Engineering》 2009-01
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Nano-CeO_2/Ni Composites Prepared by Pulse Electroforming

LAN Ming-ming,XUE Yu-jun,DUAN Ming-de,MA Wei,LI Ji-shun(Henan University of Science and Technology,Luoyang 471003,China)  
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.
【Fund】: 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)
【CateGory Index】: TQ153.4
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