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 interfaces are normally sources of elastic stress and thus may interact with outer surfaces. In addition, they can offer high diffusivity paths and thus represent two‐dimensional reaction media. Essential kinetic situations are defined and basic formal considerations are summarized. Corresponding experimental examples are presented in order to illustrate kinetic phenomena at static and moving boundaries. This includes questions of exchange fluxes, boundary‐controlled solid state reactions, morphology, nonlinear phenomena and reactions in boundaries.