ANALYSIS OF THE STRUCTURE OF POROUS SYSTEMS .1. CRITICAL COORDINATION-NUMBER IN MONODISPERSED POWDER MATERIALS AND RATIO OF SINGLE AND INTERPHASE CONTACTS IN 2-PHASE MIXTURES

Analysis of the parameters of a dispersed powder system at the thresho ld concentration indicated that the ratio between the number of single -phase and interphase contacts in a two-phase mixture is determined no t only by the volume concentration of one of the components, but also by the porosity of the system as a whole. Comparison of the ratio of p articles with single-phase and interphase contacts calculated from the component concentrations on the one hand, and from the percolation eq uation on the other, indicated satisfactory agreement. The critical co ordination numbers for two- and three-dimensional systems were in good agreement, as well as the equations that define the ratio between sin gle-phase and interphase contacts in two-phase monodispersed systems a s a function of the volume concentration of one of the components.