摘要
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 process of wire electrical explosion, the effect of charging voltages on nano-powders scale distribution is very important. A series of experiments were carded out by wire electrical explosion, the effects of charging voltages were understood by analyzing nano-powders scale distribution and formation. The results show that, the amount of micron-size particles and the average diameter of nano-powders decrease to the minimum only at some certain charging voltage, while they can increase at the other charging voltages. The detailed analysis show that, the energy density deposition of the metal wire increases with the increase of initial charging energy, but it can decrease when the breakdown occurs surrounding the wire surface.
出处
《热加工工艺》
CSCD
北大核心
2014年第6期59-62,共4页
Hot Working Technology
基金
甘肃省自然基金资助项目(1014RJZA014)
国家自然科学基金资助项目(51061011)
关键词
丝电爆
爆炸产物
气体放电
等离子体
能量沉积
wire electrical explosion
explosion products
gas discharge
plasma
energy deposition
