Vývoj modelu tlustého rozhraní pro efektivní popis segregace a tažení příměsí migrujícím rozhraním. Rozšíření stávajících modelů růstu zrn a hrubnutí precipitátů o efekty segregace a tažení příměsí. Aplikace rozšířených modelů na nanokompozity. (cs)
The microstructure stability of nanocomposites at elevated temperatures seems to be the most critical problem for their mechanical properties. The driving force for grain growth as well as for coarsening of the precipitate microstructure is extremely high, which causes a structure evolution at temperatures much lower than in standard structure materials. Several attempts have been made to stabilize the grain structure e.g. by decreasing the grain boundary energy by intensive segregation or to prohibit the precipitate coarsening by a significant narrowing of the precipitate size distribution or by a significant decrease of the concentration of an element, contained in the precipitate, in the matrix. The application of the Onsager’s thermodynamic extremal principle, formulated in discrete parameters, seems to be a handy tool for development of models for the microstructure evolution in complex nanosystems. The main goal of this project is to develop models by application of the thermodynamic e (en)