Calculation of binodals and spinodals in multicomponent alloys by different statistical methods with application to iron-copper-manganese alloys

Journal Article · Mon Nov 15 00:00:00 EST 2010 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776110110117· OSTI ID:21443347

Zhuravlev, I A; Khromov, K Yu ^[1]

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1. Russian Research Centre Kurchatov Institute (Russian Federation)

A generalization of the pair-cluster (PC) approximation in the theory of disordered systems to multicomponent alloys is proposed. It is shown that phase equilibrium boundaries (binodals) calculated in the mean-field (MF) approximation, which is used in standard calculations of phase diagrams by the CALPHAD method, coincide with the results of rigorous calculations for dilute alloys; however, the application of these methods to calculating the boundaries of the stability region with respect to the decomposition of an alloy (spinodals) leads to large errors. At the same time, in the PC approximation, the description of all statistical properties, including binodals and spinodals, turns out to be exact for dilute alloys. The methods developed are illustrated by an example of iron-copper-manganese ternary alloys.

• OSTI ID: 21443347
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 111, Issue 5; Other Information: DOI: 10.1134/S1063776110110117; Copyright (c) 2010 Pleiades Publishing, Ltd.; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APPROXIMATIONS
COPPER
DECOMPOSITION
DILUTE ALLOYS
INTERMETALLIC COMPOUNDS
IRON
MANGANESE
MEAN-FIELD THEORY
PHASE DIAGRAMS
PHASE STABILITY
TERNARY ALLOY SYSTEMS
ALLOY SYSTEMS
ALLOYS
CALCULATION METHODS
CHEMICAL REACTIONS
DIAGRAMS
ELEMENTS
INFORMATION
METALS
STABILITY
TRANSITION ELEMENTS