Modeling of porosity in sintered disperse powders

S3D Evolution allows performance of computational experiments that demonstrate correlation relationship among the dispersion characteristics of the powders, consolidation speed and porosity. Computational experiments demonstrate the way the disperse characteristics of the particles affect porosity characteristics. S3D Evolution models the conditions under which the sintering causes genesis of either large intergroup pores, or pores within the groups. The latter pores are uniformly distributed by volume.

a b c Fig. 1. Microstructure and distribution of porosity P by height h in the model packing of disperse particles. Sintering is modeled with the diffusion-viscous flow mechanism: (a) monodisperse system, R=1; (b) system with normal distribution of particles size, R=1, σ=0,2; (c) system with log-normal distribution of particles size, R=1, lnσ=0,3