(上海交通大学 材料科学与工程学院， 上海 200030)
摘 要: 通过对金属铝箔施加高密度脉冲电流的方法，从实验和理论上研究了电脉冲对金属铝箔的作用机制。实验结果表明，电脉冲对铝箔能够产生收缩作用，铝箔的收缩率与电脉冲充电电压和充电电容以及放电次数有关，充电电压越高，充电电容越高，放电次数越多，铝箔的收缩率就越大。分析认为，脉冲电流在铝箔中产生的电磁力是导致铝箔收缩的主要原因，而脉冲电流产生的焦耳热则不会导致铝箔熔化收缩。
关键字: 电脉冲；电磁力；焦耳热；金属铝箔
current on metal aluminum foil
（School of Materials Science and Engineering，
Shanghai Jiaotong University，Shanghai 200030，China）
Abstract:The high density pulse electric current (HDPEC) was applied to the metal aluminum foil to study the effect of HDPEC on metal aluminum foil. The experimental results show that the aluminum foil will shrink when the HDPEC is applied. The ratio of the shrinkage is determined by the charge voltage，the capacitance and the discharging times. The larger the charge voltage or the charge capacitance or the discharging times，the more the shrinkage ratio is. It is analyzed that the electrical magnetic force induced by HDPEC is the main reason for the shrinkage of the aluminum foil. However，the effect of Joule heat produced by HDPEC on the shrinkage of aluminum foil can be ignored completely.
Key words: high density pulse electric current; electric magnetic force; Joule heat; metal aluminum foil
