Abstract:
The use of alloying components to control the microstructure and inhibit the growth of precipitates during alloy decomposition is a promising method for developing new materials. However, in the analysis of decomposition kinetics and the mechanisms of “core-shell” structure formation, the effect of solid-phase wetting is rarely taken into account. It is traditionally believed that wetting is more characteristic of transformations involving a liquid phase. This work demonstrates that wetting is determined by the same interatomic interaction energies responsible for decomposition, and therefore should be considered in the analysis of transformations in multi-component alloys. Furthermore, the Kinetic Monte Carlo modeling automatically takes this effect into account, while diffusion phenomenological models often neglect it. Conditions for complete and partial solid-phase wetting are formulated. The conditions for stabilizing dispersed states of the alloy in the presence of wetting are investigated.
Keywords:Ternary alloy, spinodal decomposition, dispersed states, Monte Carlo simulation, solid phase wetting.
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