Effect of milling time on the particle size distribution and morphology of tungsten powders

The tungsten particles in the different particle size distribution were obtained by changing the ball milling time to increase the volume fraction of tungsten particles in the objective particle size distribution of 5~11 μm, and the influence of ball milling time on the particle size distribution and morphology of tungsten powders was analyzed. The results show that, the tungsten particle size decreases significantly in the initial ball milling for 2 h, and the maximum particle size decreases rapidly from 134 μm to about 20 μm. With the further increase of milling time, the typical particle size distribution parameters of tungsten powders decrease slowly. The morphology of tungsten powders does not change except the decrease of particle size. The agglomeration phenomenon appears after milling for 10 h. Comprehensive analysis shows that, the change of ball milling time has a great influence on the particle size distribution of tungsten powders. When the ball milling time is 8 h, the narrowest particle size distribution of tungsten powders is obtained, and the volume fraction of the tungsten particles in the objective particle size distribution reaches 75%.