Title

Phase-Field Investigation Of Multicomponent Diffusion In Single-Phase And Two-Phase Diffusion Couples

Keywords

Computation; Interdiffusion; Microstructure; Multi-component diffusion; Phase field modeling; Thermodynamics; Zero flux planes

Abstract

Interdiffusion in hypothetical ternary single-phase and two-phase diffusion couples are examined using a phase-field model by numerically solving the nonlinear Cahn-Hilliard and Ginz-burg-Landau equations. For diffusion couples assembled with a regular single-phase solution, constant chemical mobilities were used to examine the development of concentration profiles including uphill diffusion and zero-flux plane. Zero-flux plane for a component was observed to develop for a diffusion couple at the composition that corresponds to the activity of that component in one of the terminal alloys. Experimental thermodynamic parameters and composition-dependent chemical mobilities were used to examine the morphological evolution of the interphase boundary in solid-to-solid, two-phase diffusion couples. Instability at the interphase boundary was introduced initially (t = 0) by a small compositional fluctuation at the diffuse interface, and its evolution varied largely as a function of terminal alloys and related composition-dependent chemical mobility. © ASM International.

Publication Date

12-1-2006

Publication Title

Journal of Phase Equilibria and Diffusion

Volume

27

Issue

6

Number of Pages

676-683

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1361/154770306X153738

Socpus ID

33845774298 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33845774298

This document is currently not available here.

Share

COinS