论文部分内容阅读
在丝电爆过程中,初始充电电压对最终的纳米粉尺度分布有重要影响。在气体放电式丝电爆装置上进行系列试验,通过分析爆炸产物尺度分布及其形成原因,认识初始充电电压的影响。结果表明,在初始充电电压较低时,纳米粉中纳米级颗粒的平均粒径、微米级大颗粒比例随初始充电电压升高而逐渐减小,而初始充电电压过高时,纳米级颗粒平均粒径、微米级大颗粒比例反而会随初始充电电压的升高而增大。分析可知,在初始充电电压过高时,丝表面发生沿面放电现象,会阻碍能量向金属丝沉积。
During the wire explosion process, the initial charge voltage has an important effect on the final nano-scale distribution. A series of experiments were carried out on the gas discharge wire electric blasting device. By analyzing the scale distribution of the explosive products and the reasons for the formation, the influence of the initial charging voltage was recognized. The results show that the average particle diameter of nanometer scale particles and the proportion of large particle size in nanometer powder gradually decrease with the increase of initial charging voltage when the initial charging voltage is low. When the initial charging voltage is too high, the average particle size of nanometer scale particles Particle size, micron-scale large particles but will increase with the initial charge voltage increases. Analysis shows that, in the initial charge voltage is too high, the surface of the filament surface discharge phenomenon, will hinder the energy deposited to the wire.