电爆法制备钽微米粉

Tantalum micron powder by electrical explosion

研发了一种制备金属粉的丝电爆装置,通过改变初始电压和丝径对钽丝进行电爆试验,并表征了所制备的钽微米粉。结果表明:初始电压增大,钽丝单位体积上能量沉积密度提高,微米粉平均粒径减小、粒径分布变窄。初始电压增加到一定程度时,微米粉粒径分布变宽,平均粒径趋于稳定值,制备的钽微米粉平均粒径为15μm。

A wire electrical explosion device for preparing metal powder production was designed.By changing the initial voltage and wire diameter,the electrical explosion experiment of the tantalum micron powders carried out.The prepared tantalum micron powders was characterized.The results showed that density of energy deposition per unit volume of the metal wire could be improved by increasing initial voltage,the average particle size of tantalum micron powders could be reduced,the particle size distribution becomed narrow.When the voltage increased to a certain degree,the particle size distribution becamed wide.The average particle size of the powder was in a relative stable value.The average particle sizes of the prepared tantalum micron powders were 15μm.