Impurity and interdiffusion coefficients of the Cr-X (XÂ =Â Co, Fe, Mo, Nb, Ni, Pd, Pt, Ta) binary systems

A recently developed forward-simulation method can reliably extract impurity diffusivity down to 10−18 m2/s range even in very challenging situations when the diffusion coefficient varies drastically with composition and when the solubility is very low. The combination of this novel method with diffusion multiples will provide much-needed impurity diffusivity values and interdiffusion coefficients that are essential to the establishment of reliable diffusivity/mobility databases for kinetic modeling. The diffusion coefficient of the Cr-based bcc phase for several binary systems is extremely strongly composition-dependent, thus calling for detailed studies in the future of the mechanisms.