Nonisothermal eutectic crystallization

A model for the dynamics of nonisothermal eutectic growth is examined in the limit of a spatially uniform but time dependent temperature field. The simpler case of nonisothermal growth is first considered, and approximate solutions are obtained for the crystallization rate for the growth of a single crystallite and for homogeneous nucleation. For eutectic transformation the latent heat generated during invasion of a eutectic crystal into an amorphous background is shown to increase the lamella wavelength. For homogeneous eutectic growth, the latent heat is shown to alter significantly the growth mechanisms observed under isothermal conditions.