A New Technique for Evaluating Diffusion Mobility Parameters
Carelyn E. Campbell
The development and evaluation of a multicomponent diffusion mobility database for Ni-rich alloys are reviewed. In an effort to more directly evaluate the mobility parameters in the database, a method for optimizing the mobility parameters as a function of the experimental composition profiles is proposed. This method is demonstrated for the Ni-Co system at 1100 degrees C. The optimization of four diffusion mobility parameters, improved agreement between the experimental and calculated composition profiles and decreased the error between the experimental and calculated interdiffusion coefficients from 45 % to less than 5 %. This method can easily be expanded to multicomponent systems.
Proceedings| 1st| DSL 2005
July 6-8, 2005
International Conference n Diffusion in Solids and Liquids