TRANSITION AND EQUILIBRIUM PROCESSES IN METAL-CERAMIC PARTICLE-SYSTEMS

The nonlinear motion equation of a spherical particle pushed by the so lidification front is determined. In equilibrium, by integrating this equation, we obtain the critical interfacial speed, both in the absenc e and presence of thermal conductivities. The results are similar to t hose given by Stefanescu et al. only in the case of ionic crystals (n = 2). The analysis of the motion of the particle far from the interfac e makes it possible to introduce a time constant as a measure of the m otion uniformity degree. In such a context, it may be assumed that the lesser the time constant, the quicker the incorporation of the partic le by the metal matrix.