Analysis of morphological stability in ternary two-phase diffusion couples

It has been established that, under certain conditions, the flat interphase boundary separating two ternary phases can be become morphologically unstable during the interdiffusion process. By a direct analogy with the constitutional supercooling criterion in alloy solidification, it has been proposed that the instability in ternary two-phase diffusion couples occurs when either or both diffusion paths enter into the two-phase region of the …