Interdiffusion in Ternary Systems with Two-Phase Zones — Approaches and Models

• Main Author: Yu. O. Lyashenko
• Format: Article
• Language: English
• Published: G. V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine 2003-06-01
• Series: Успехи физики металлов
• Online Access: https://doi.org/10.15407/ufm.04.02.081

Salient features of interdiffusion in the ternary metallic systems are analysed. Investigation of interdiffusion in ternary and other multicomponent alloys is difficult in both theoretical and experimental aspects because it can lead to the two-phase zone formation in the result of the diffusion interaction in the systems with two-phase fields on the isothermal phase diagram. A modelling of the interdiffusion in the ternary systems with two-phase regions makes possible to take into account the two-phase zone growth, to determine the diffusion path and to analyse their stability under the different approaches. Such a modelling requires a consideration of different thermodynamic and diffusion approaches. Addition of one or more components to the binary system makes all diffusion problems much more complicated and introduces new problems. Among them the most interesting seem to be: 1) creation of self-consistent model of the phase-diagrams’ construction and diffusion interaction with possibility of the two-phase zone formation; 2) choice of the diffusion path within concentration triangle; 3) determination of the two-phase zone formation criteria; 4) investigation of the morphology being dependent on the initial condition and diffusion parameters.