A numerical method was developed for extracting composition-dependent interdiffusion coefficients from concentration profiles in a single diffusion couple. The procedure was based upon minimization of the difference between profiles, calculated using a finite difference scheme, and the experimental plots. Tests which were performed on calculated profiles, with noise added so as to simulate experimental scatter, demonstrated the advantage of procedure when compared with classic inverse methods. In particular, the interdiffusion coefficient values were obtained along the entire diffusion path, instead of only at the intersection point of independent paths.

A Numerical Inverse Method for Calculating the Interdiffusion Coefficients Along a Diffusion Path in Ternary Systems. R.Bouchet, R.Mevrel: Acta Materialia, 2002, 50[19], 4887-900