Kinetics of contact melting under conditions of non-steady-state diffusion

The average rate ¯v_n of contact melting under conditions of non-steady-state diffus ion was measured for 8 metallic systems using a procedure in which a crystal-liquid-crystal nonconvection system could be produced. It is shown that when the experimental data on ¯v_n are suitably reduced, it is possible to obtain the rate ¯v_S of contact melting in the steady state. v_n and v_S are calculated in the same systems, using equations derived by the authors. The calculated data on ¯v_n and on its temperature dependence agree satisfactorily with the experimental data. The coefficients of heterodiffus ion in metallic melts with large component concentrations are calculated using the experimental data for ¯v_n.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 13–17, December, 1970.