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Low-voltage electromagnetic compaction of Metal and Ceramic Powders

Journal of Wuhan University of Technology(Materials Science) 2007年第4期22卷 714-717页

作者：孟正华黄尚宇 School of Materials Science and Engineering Wuhan University of Technology

Low-voltage electromagnetic compaction （EMC） was used to compact metal powders （Cu） and ceramic powders （TiO2） in the indirect way. It was found that the density of the metal powder parts compacted by low-voltage EMC varied linearly with the discharging voltage in the range investigated. But for ceramic powders, the discharging voltage has an optimal value. Under the value, the density increases as discharging voltage rises, but beyond the value the trend is reverse. The experimental results show that the density of the metal parts decreases gradually along press direction. And the density of the ceramic parts decreases with the advancement of the aspect ratio h/d （height/diameter）. In addition, repetitive compaction can improve the density of both metal and ceramic parts and reduce the effects of aspect ratio on the density.

关键词： powder low-voltage electromagnetic compaction density

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The Low-Voltage electromagnetic compaction of Powder Materials

引用

Journal of Wuhan University of Technology(Materials Science) 2002年第4期17卷 39-43页

作者：吴彦春 Mechanical and Electronic Department Wuhan University of Technology Wuhan 430070 China

The low-voltage-electromagnetic forming was applied to powder compaction.A series of experiments was performed to compact aluminum,copper and tin powders in an indirect working *** compacted high-density powder parts successfully,the authors analyzed the effects of voltage,capacitance,friction,compaction times,powder size and other factors on the densities of compacted *** experimental results show that lower voltage but larger capacitance are beneficial to increasing the density and homogeneity of the compacted specimens,if the loading velocity and discharging energy are *** higher the voltage,the greater the percentage of energy consumed by *** the equipment energy is limited,the iterative compaction is an efficient way to manufacture homogeneous and high-density powder parts.

关键词： powder compaction low-voltage electromagnetic compaction

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