Kinetics of nucleation and crystal growth

This paper deals with homogeneous and heterogeneous primary nucleation and the atomistic model of heterogeneous primary and secondary nucleation. Thre e aspects of crystal growth mechanisms will be taken into account: growth b y two-dimensional nucleation, the so-called birth and spread model, spiral growth without and with consideration of the influence of diffusion, and fi nally adhesive growth. An equation for the estimation of the growth rate of imperfect crystals including dislocations, published by Mersmann [1], is d iscussed. The influence of additives on nucleation and crystal growth, resp ectively, will be exemplarily explained for several model systems. The effe ct of growth rate dispersion (GRD) is described. Therefore, some experiment al results concerning growth rates and different ways to influence growth a re represented and discussed. Furthermore, a model explaining the effect of GRD is represented.