|About this Abstract
|2021 TMS Annual Meeting & Exhibition
|Hume-Rothery Symposium: Accelerated Measurements and Predictions of Thermodynamics and Kinetics for Materials Design and Discovery
|Some Properties if the Multicomponent Diffusivity Matrix
|On-Site Speaker (Planned)
The analysis of diffusion in multicomponent alloys such as high-entropy alloys requires the knowledge of the full diffusivity matrix for the phase under consideration. The values of the elements in the matrix depend on how the driving forces are expressed and what frame of reference that is used. Nevertheless, they must fulfill certain requirements giving rise to a number of issues, For example, what can be said about the sign of diffusivities and under what conditions is the matrix symmetric. The latter property is referred to as the Onsager reciprocal relations and are still sometimes controversial although they were published already 1931. One reason for the controversy may be Onsager’s somewhat complex proof. In the talk the sign of diffusivities and the validity of the Onsager relations will be discussed.
|High-Entropy Alloys, Modeling and Simulation, Other