Al/Ni反应多层膜的电爆炸及驱动性能研究

为了研究Al/Ni反应多层膜在爆炸箔起爆系统上应用的可行性,采用磁控溅射法制备了相同厚度的Cu和Al/Ni多层膜桥箔,利用SU-8光刻胶制备一定厚度的加速膛,研究了两类桥箔在相同放电回路中的沉积能量和驱动飞片的平均速度。结果表明:在储能电容电压为1 306V的放电回路中,Al/Ni多层膜的沉积能量为0.120 5~0.127 4J,相比Cu箔提高了近1倍。在电压为1 900V时,多层膜沉积能量比Cu箔提升了18%~58%;多层膜驱动的飞片平均速度高于Cu箔驱动飞片约10%。因此,Al/Ni反应多层膜能降低爆炸箔起爆系统的起爆阈值,提高其冲击起爆的可靠性。

Explosion and Flyer-driving Performance of Al/Ni Reactive Multilayers

To investigate the influence of Al/Ni reactive multilayer foils on the exploding foils initiator, Cu and Al/Ni exploding foils with the same bridge size were fabricated and tested at the identical discharge circuit. SU-8 photoresist was employed to prepare the barrel. Results showed the energy deposition of Al/Ni foil was between 0.120 5~0.127 4 J, which was nearly twice than the value of Cu foil, with a operating voltage of 1 306 V. Compared with Cu foil, 18%~58%increase of energy deposition was found when the capacitor was initially charged to 1 900 V. Meanwhile, the average velocity of flyer driven by multilayer foils was higher than that by Cu foil about 10%.It can be concluded that Al/Ni exploding foil is able to enhance the reliability of the initiator and reduce its initiation threshold.