The powder metallurgy processing involves four main steps. First is the preparation of the powder, which includes the preparation of materials. Depending on the material requirements and the formula, the components are mixed together. This method primarily considers the particle size and flowability of the powder, as well as its packing density. The particle size determines the gaps between the filling particles. It is best to use the mixed material immediately; do not leave it for too long, as prolonged storage can lead to moisture and oxidation.