Diffusion Parameters of the System

In the case of the Cu-Ni system at 888 K, we use the bulk diffusion coefficient before and behind the moving boundary equal to = 3.8 x 10-20 ni s-i [51], The grain boundary diffusion coefficient is evaluated from the empirical expression  

The calculation of the DIGM parameters is performed using, firstly, the experimentally determined mobility M = 2 x 10 22 (Js)- from the model [51] in the case 

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A comparison of the numerical solutions of Equations 8.77 and 8.78 was carried out. For the diffusion parameters of the system, the value and direction of the current density (electric intensity Ex) varied. 

Similar to the case of a binary system, the theory for finding the incubation time of the intermediate phase formation was proposed for ternary systems. This time strongly depends not only on diffusion parameters of the system (diffusivities), but also on the initial composition of the samples which undergo isothermal diffusion. Unlike the binary system, the ternary initial composition influences not only the incubation time, but the result of the whole diffusion process. 

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