The Need for a Reference Self-Diffusion Mobility Database for the Pure Elements

Published

July 25, 2013

Author(s)

Carelyn E. Campbell

Abstract

The increased focus on integrated computational materials engineering (ICME), especially through the Materials Genome Initiative (MGI) , has amplified the need to develop CALPHAD-based multicomponent diffusion mobility databases for a variety of applications, ranging from structural Ti and Mg alloys to materials for photovoltaic absorber materials. Essential for the development of both commercial and non-commercial multicomponent diffusion mobility databases (e.g. NIST Ni mobility database[1]) are evaluations of the mobilities in the unary, binary and ternary systems, as initially demonstrated by Andresson and Agren [2]. The growth of published diffusion mobility descriptions and the number of descriptions for self-diffusion of a given pure element has increased signficiantly in the past 5 years. With this increasing publication rate multiple self-diffusion mobilities for the same pure element have been published. For example, currently in the published literature there three published diffusion mobility assessments for the self-diffusion of Al in the fcc phase [3-5] and two for V in the bcc phase [6, 7]. The existence of multiple published self- diffusion assessments for the same element has lead to different binary and ternary assessments choosing different values for the self-diffusion mobility of given pure component. As consequence of this, it becomes difficult to combine various binary and ternary assessments to build a needed multicomponent diffusion mobility databases.

Citation

Journal of Phase Equilibria and Diffusion

Pub Type

Journals

Keywords

self-diffusion, reference database, CALPHAD

Citation

Campbell, C. (2013), The Need for a Reference Self-Diffusion Mobility Database for the Pure Elements, Journal of Phase Equilibria and Diffusion (Accessed May 17, 2024)