一次相転移のカイネティクス

抄録

A characteristic waiting time appears at fixed temperature above T_c or M_s for elements, alloys and polymers, where T_c is the usual first-order phase transition temperature and M_s is the normal martenstic phase transition temperature. This waiting time is called incubation time and related with the nucleation probability derived from a nucleation barrier. That is why nucleation process is regarded as thermal activated process at the non-equilibrium state. In particular, such a long incubation time of In-Tl alloys has a good agreement with experimental results by using Roitburd method. Furthermore, detailed and accurate experiments enable us to be aware that two dimensional growth occurs above T_p, where peculiar temperature, T_p, controls the time development of diffraction patterns and appears above M_s in this system.
In contrast to soft phonon model, incubation time is essential property of the first-order phase transition and the key to resolve nucleation and growth process.