Assessment of diffusional mobilities of Gr, Ni, and Si in fcc Cr-Ni-Si alloys

The diffusional mobilities of Cr, Ni, and Si in fee Cr-Ni-Si alloys have be en assessed as a function of temperature and composition by means of a CALP HAD (CALculation of PHAse Diagrams) type of procedure. Optimized kinetic pa rameters are presented. Comparisons between the calculated and measured dif fusion coefficients show that most of the experimental information is satis factorily accounted for by the present modeling. The obtained parameters ca n predict reasonably concentration profiles in binary Ni-Si and ternary Cr- Ni-Si diffusion couples.