Abstract
The kinetics of decomposition of a supercooled melt or a viscous fluid under heat-insulating conditions during intensive nucleation has been investigated. Particles of a new phase have been studied, whose size is larger than the critical value, and for which the times are longer than the settling time of the classical quasi-steady state, which is characteristic of subcritical nuclei. The heat removal from the phase boundary is assumed to be the key process in the vicinity of a growing particle. The estimates of the duration of the stage of intensive nucleation, the maximum number of nucleated particles, and their average “size” have been obtained. Numerical simulations have been performed for nickel.
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