Micromechanics analysis of powder consolidation in manufacturing particulate-reinforced MMCs.

摘要

A micromechanics study of the interaction between reinforcing particulate and matrix powder particles subjected to isostatic pressing has been carried out. The model enables us to examine the deformation, number of contacting particles, total contact area, and average contact pressure on an individual particulate or powder particle. Three different powder systems were analyzed. Particularly, the composite powder systems are typified by a dual-sized powder system consisting of 20 wt % reinforcing particulate and 80 wt % matrix particles of 1/2.6 size ratio. The analysis shows that the smaller reinforcing particulates experience larger specific contact area and higher average contact pressure in comparison with the larger matrix powder particles. 18 refs., 11 figs.