Figure 2
From: Effect of ball collision direction on a wet mechanochemical reaction

Impact energies between balls calculated for various planetary ball milling conditions in water. (a) Distributions of impact energy per collision at the ball input of 100 g. (b) Relationship between the input of balls (ϕ3–8 mm) and the total impact energy at 150 G. (c) Distributions of impact energies in the normal and tangential directions at 150 G with ϕ5 mm balls (100 g). (d) Relationship between the input of ϕ5 mm balls and the impact energies of each component at 150 G.