Nucleation in the Diffusion Zone of a Ternary System

2) The increase of the diffusion coefficient in the P solution expands the range of initial compositions of a solution at which the modes with growth of only one intermediate phase can be realized. 

3) The region of initial compositions of the P solution, at which the growth of sequential phases A-2-1- is possible, is narrowed down with a decrease of the interdiffusion coefficient in fi solution and with increase of the interdiffusion coefficient in the intermediate phase 1. 

4) A decrease of the interdiffusion coefficient in the solution results in an expansion of the region of initial compositions of a solution at which the realization of the modes with formation of a two-phase zone is possible. 

5) There are regions of initial compositions of the solution ff, at which the simultaneous realization of several diffiision modes is possible. The solution of this problem needs additional research. 

At reaction-diffusion processes in ternary systems, the phase spectram of the diffusion zone, even for small annealing times, depends on the initial composition of the diffusion couple and on the set of diffusion parameters [28- 33]. Furthermore, the choice of the diffusion path may appear to be ambiguous [34, 35). In such a case, the stage of nucleation becomes a decisive one. 

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