Naumuk A. Theory of Self-Organization during Eutectic Solidification and Cellular Precipitation

A new approach to the consideration of stationary nonequilibrium processes developed based on determination of the rate of change of free energy in two different ways (based on the free energy balance away from the front of the process and on consideration of dissipative diffusion processes near the front), and the application of the principle of the maximum speed of the process front. A complete thermodynamic description of stationary eutectic crystallization and cellular decomposition of supersaturated solid solutions is carried. The basic relationship between kinetic parameters of these processes determined, conditions for formation of various structures established. For cellular decomposition temperature dependence of the nonequilibrium concentration of residual impurities in depleted phase found and theoretically described processes of secondary decomposition. A comparison of theoretical and experimental data for cellular decomposition of Pb-27,07at.% Sn carried.