Figure 3
From: Interface topology for distinguishing stages of sintering
Euler characteristics and number of pores. (a) Normalized Euler characteristic per unit volume X/V and stages of sintering. ((I) Initial stage, (II) intermediate stage, and (III) final stage). (b) Number of closed pores per unit volume and the ratio of open porosity. The unit volume is a cube with edge length L, which is 10 times of the average particle diameter.
