Publications in Scientific Journals:
J. Svoboda, E. Gamsjaeger, F.D. Fischer, Y. Liu, E. Kozeschnik:
"Diffusion processes in a migrating interface: The thick-interface model";
During a solid/solid diffusive phase transformation from a parent b-phase to a product a-phase, dissipative processes due to diffusion
in the bulk phases as well as rearrangement of the crystal lattice and diffusion in the interfacial region occur. A model has been developed that accounts for all the above-mentioned dissipative processes. By means of this thick-interface model it is possible to assign a finite thickness and a finite mobility to the interface. The evolution of the mole fraction profiles of the components in the bulk phases and in the interface can be simulated from a given initial state until a steady state or equilibrium is attained. Based on this theoretical framework the kinetics of the c/a phase transformation in the Fe-rich Fe-Cr-Ni system is simulated. Starting from a certain initial composition the transformation kinetics exhibits the features of a massive or a bulk diffusion controlled transformation depending on temperature.
Modeling, Phase transformation, Diffusion, Interface migration, Thermodynamic extremal principle
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Created from the Publication Database of the Vienna University of Technology.