The Algorithm to Predict the Grain Boundary Diffusion in Non-Dilute Metallic Systems

The analysis of grain boundary (GB) diffusion in metallic systems based on Cu, Ni, Ag and Al was made to set demonstrate the common behavior. It was shown that the slow penetration for 11 systems can be connected with negative segregation or specific interatomic interaction. Two energetic parameters such as energy of interaction with GB and energy of interatomic interaction are proposed as main characteristics. The analysis of a tendency toward segregation and tendency of intermediate phase formation in these terms allows us to divide the systems on four groups and formulate a qualitative way to predict the behavior of the diffusing elements in a non-dilute solution. Mathematical formulation of GB diffusion problem and typical solutions are presented.

Automated summary

The common behavior of grain boundary diffusion in metallic systems based on Cu, Ni, Ag and Al was analyzed. The slow penetration for these systems was found to be related to negative segregation or specific interatomic interaction. Two energetic parameters, namely the energy of interaction with GB and the energy of interatomic interaction, were proposed as main characteristics. By analyzing the tendency toward segregation and intermediate phase formation, the systems can be divided into four groups and a qualitative way to predict the behavior of diffusing elements in a non-dilute solution was formulated. Mathematical formulation of the GB diffusion problem and typical solutions were presented.