Heterodiffusion coefficients in {\alpha}-iron

TL;DR

This paper presents a thermodynamical model that accurately reproduces tungsten diffusion coefficients in alpha-iron across a wide temperature range, linking defect parameters with bulk material properties.

Contribution

It introduces a novel thermodynamical approach to predict diffusion coefficients from bulk elastic and expansivity data, enhancing understanding of defect behavior in alpha-iron.

Findings

Diffusion coefficients can be modeled using bulk elastic and expansivity data.

The model accurately reproduces experimental diffusion data across temperatures.

Provides insights into defect parameters influencing diffusion in alpha-iron.

Abstract

The diffusion of tungsten in {\alpha}-iron is important for the application of ferritic-iron alloys to thermal power plants. These data, over a wide temperature range across the Curie temperature, have been recently reported. We show that these diffusion coefficients can be satisfactory reproduced in terms of the bulk elastic and expansivity data by means of a thermodynamical model that interconnects point defects parameters with bulk qualities.