Influence of current injection ways on efficiency and size of powders in preparation of nano-powders with electrical explosion  

作　　者：张爱华 吴龙 杨富龙 周爱武 朱亮 

机构地区：[1]School of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou, 730050. [2]School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou,730050.Zhang Aihua,

出　　处：《China Welding》2014年第1期51-58,共8页中国焊接（英文版）

基　　金：This research was supported by National Natural Science Foundation of China （No. 51061011 ）.

摘　　要：Wire electrical explosion may result in the existence of micro-sized large particles in powders while current injection ways may influence the size and content of micro-sized large particles. Therefore, two kinds of electrical explosion devices with different electrodes by gas discharge were designed in this paper. The pole-board electrodes and the cone electrodes were used respectively for studying copper wire electrical explosion process. The current and voltage data were measured with the Rogowski coil and high voltage probe. The results show that the pulverizing process of electrical explosion is more efficient when the wire electrode current density injected into the cone electrodes is approximately twice as much as the pole-board electrodes. The content of micro-sized large particles is the least among the products of the electrical explosion, when the total deposition energy of the wire prior to vaporization stage is 2. 5 times larger than that of the theoretical value of the completed vaporization.Wire electrical explosion may result in the existence of micro-sized large particles in powders while current injection ways may influence the size and content of micro-sized large particles. Therefore, two kinds of electrical explosion devices with different electrodes by gas discharge were designed in this paper. The pole-board electrodes and the cone electrodes were used respectively for studying copper wire electrical explosion process. The current and voltage data were measured with the Rogowski coil and high voltage probe. The results show that the pulverizing process of electrical explosion is more efficient when the wire electrode current density injected into the cone electrodes is approximately twice as much as the pole-board electrodes. The content of micro-sized large particles is the least among the products of the electrical explosion, when the total deposition energy of the wire prior to vaporization stage is 2. 5 times larger than that of the theoretical value of the completed vaporization.

关 键 词：NANO-POWDERS wire electrical explosion gas discharge energy density 

分 类 号：TQ560.72[化学工程—炸药化工] TM744[电气工程—电力系统及自动化]