KINETICS OF FIRST-ORDER PHASE-TRANSITIONS IN THE ASYMPTOTIC STAGE

We construct an asymptotic theory that describes the kinetics of first -order phase transitions. The theory is a considerable refinement of t he well-known Lifshits-Slezov theory. The main difference between the two is that the Lifshits-Slezov theory uses for the first integral of the kinetic equation an approximate solution of the characteristic equ ation, which is valid in the entire range of sizes except for the bloc king point, i.e., it uses a nonuniformly applicable approximation. At the same time, the behavior of the characteristic solution near the bl ocking point determines the asymptotic behavior of the size distributi on function of the nuclei for the new phase. Our theory uses a uniform ly applicable solution of the characteristic equation, a solution vali d at long times over the entire range of sizes. This solution is used to find the asymptotic behavior of all basic properties of first-order phase transitions: the size distribution function, the average nucleu s size, and the nucleus density. (C) 1998 American Institute of Physic s.