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Diffusion Path Stochastization in the Two-Phase Region

The presence of the jump ofp [51], which is equivalent to difiusion path breaks along one of the conodes can be described using the balance flux equation on the [Pg.353]

Let Ml and Mi be constant (they do not change at the p jump). In this case for the compatibility of Equation 10.27 the following conditions [Pg.353]

Let us consider another interpretation interdiffusion in a two-phase zone of a ternary system can be formally defined with the help of ordinary Pick s equation system with a 2 x 2 matrix of diffusion coefficients D,j. But here the coefficients are not independent [37] (it means that there is only one thermodynamic degree of freedom at fixed T and p). Here det Dy=0 or D = 0, that is, the matrix of interdiffusion coefficients is degenerated. It should be mentioned that the condition det D,j=0 (or D = 0 for the binary alloy) is inherent for the spinodal, which is also characterized by the stochastization and the final state indefinabihty. [Pg.354]


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