Figure 3: Rolling and rotation of copper spheres during sintering in sample I.
From: Cooperative material transport during the early stage of sintering
Globally averaged cumulative particle-rolling angles 
(black thick broken line) and particle-rotation angles 
(black thick full line) versus temperature in sample I. The fine black lines show the scatter band of the intrinsic rotations, the fine broken lines denote the scatter band of the rolling angles. The temperatures given refer to the starting point of each sinter step. Coloured symbols refer to a breakdown of the marker rotations with respect to the number of interparticle contacts after the first sinter step. All data are given with respect to the first sinter step (starting at 148 °C).
