Diffusion Phase Competition in Ternary Systems

Semen V. Kornienko, Yuriy A Lyashenko, and Andriy M. Cusak 

Phase Competition in the Diffusion Zone of a Ternary System 

Diffusion-Controlled Solid State Reactions. Andriy M. Gusak Copyright 2010 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 978-3-527-40884-9 

Processes of formation and growth of intermediate phases in the diffusion zone of binary and multicomponent systems are controlled by the following multiscale processes [2, 4, 6, 8]  

1) nucleation of an intermediate phase at the interface of initial components or solid solutions  

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I 9 Diffusion Phase Competition in Ternary Systems rule,... 

Influence of Pt on Phase Competition in the Diffusion Zone of the Ternary (NiPt)-Si System... 

For the first time, a similar hypothesis for the description of the criterion of solid-phase amorphization of binary systems has been offered in [26]. Another approach to the problem of searching for the diffusion path in a ternary system can be the consideration of the initial stages of diffusion in particular, of the competition between the critical nuclei of different phases [1, 27]. 

At that boundary, the composition of the alloy BC shifts along the BC side. Indeed, if the intermetaUide requires different quantities of B and C, the initial alloy BC will become depleted of these components to a certain extent This, in particular, leads to homogeneity violation of the initial alloy of the BC couple, which in turn, causes fluxes in this part of the diffusion couple, and this influences the kinetics of the boundary movement When there are several intermediate phases on the phase diagram, the mentioned effect may cause competition between them. The failure of the two indicated modes may lead to the formation of the two-phase zone in the ternary system during the diffusion process the boundary concentration may appear to lie on different conodes and the diffusion path will not be able to bypass them. 

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