2. Production. Implementation

2.1 Powder metallurgy

The quality of sintered products depends on the characteristics of the starting tungsten powder: purity, particle size, shape and porosity, lattice defects, specific surface area, particle size distribution, bulk density, tapped density, castability, compressibility.

2.1.1 Powder selection

Certain non-volatile substitution impurities are not eliminated during sintering and affect the ductility and workability of the metal (intergranular brittleness, recrystallization). The...