Macroscopic diffusion coefficients were determined in various Nb-V alloys (figures 16 and 17), at temperatures of between 273 and 550K, and in Nb0.9V0.1 at 300K (for H contents which ranged from 0.001 to 0.033). An expected highly non-linear concentration-dependence of H diffusion in Nb0.9V0.1 at 300K was confirmed here experimentally.

R.C.Brouwer, R.Griessen: Europhysics Letters, 1991, 14[8], 803-7

Figure 16

Diffusivity of H in Nb-V

(open squares: Nb0.11V0.89, filled squares: Nb0.25V0.75, circles: Nb0.50V0.50)

Figure 17

Diffusivity of H in Nb-V

(open squares: Nb0.75V0.25, filled squares: Nb0.90V0.10)