The kinetics of solid state reactions accompanied by fracture: III. Model of stationary front with spatially ordered fracture morphology

Spatially ordered cracking caused by ion exchange in lime-soda glass has been observed in our recent experiments. It has been shown that existing models are insufficient to describe this phenomenon. In the present work we suggest a new quantitative model of a spatially ordered combined front of fracture and mass transfer. The model accounts for the possibility of spatial separation of diffusion and fracture fronts which has been shown to be a necessary condition of spatial self-organization of cracking in the investigated reaction. The model allows prediction of the conditions of observation of a stable ordered fracture morphology as well as the evolution of qualitative and quantitative characteristics of the front at various conditions. The results of the present model are in good agreement with experimental data.