CHEMICAL-KINETICS OF PHASE BOUNDARIES IN SOLIDS

The kinetics of solid/solid interfaces is of major importance for the course of heterogeneous reactions in the solid state. Solid/solid inte rfaces are normally sources of elastic stress and thus may interact wi th outer surfaces. In addition, they can offer high diffusivity paths and thus represent two-dimensional reaction media. Essential kinetic s ituations are defined and basic formal considerations are summarized. Corresponding experimental examples are presented in order to illustra te kinetic phenomena al static and moving boundaries. This includes qu estions of exchange fluxes, boundary-controlled solid state reactions, morphology, nonlinear phenomena and reactions in boundaries.