Abstract
The effect of the powder particle size of rapidly solidified aluminum alloy powder on its compaction behavior was examined using Cooper-Eaton equation. The first particle rearrangement due to the filling of pores between the powder particles strongly depends on the apparent density that has a relationship with the particle distribution. The second particle rearrangement depends on the friction force between the powder particle surfaces in filling the pores and is ruled by the specific surface area. The plastic deformation of powder, which occurs at the higher compaction pressure, is related to the compaction proof strength of the sintered material. It has a relationship with a rapidly solidified microstructure which depends on the powder particle size. The calculated total volumetric compaction quantitatively corresponds to the measured density of the green compact.
