Assessment of the diffusional mobilities in fcc Ni-Nb and fcc Ni-Mo alloys

► The atomic mobilities in fcc Ni-Nb and Ni-Mo alloys are assessed in the present work for the first time. ► The optimized mobility parameters predict reasonable concentration profiles of the binary Ni-Nb and Ni-Mo diffusion couples. ► This work complements the kinetic database of the Ni-based alloys.