Composition dependent gradient energy coefficient: How the asymmetric miscibility gap affects spinodal decomposition in Ag-Cu?

A multiscale procedure based on the stochastic kinetic mean field and the phase-field models for coarsening

“…In this article, we use a version of the original SKMF model that is modified to be applicable to asymmetric phase diagrams, 25 such as that of Ag-Cu. For that purpose, we modify the expression of the MF jump frequency Γ MF i,j , defined through Eqs.…”

“…The discussion of this disparity is beyond the scope of the present paper and some aspects of it is already discussed elsewhere. 25 In the following, simulations are performed at T ¼ 873 K, and for an average concentration c ¼ 0:83, which places the system outside of the spinodal limit in the nucleation-growth domain for both methods.…”