A capillary gas-reservoir technique was used to study the diffusion of H in liquid Ni. Following diffusion annealing, the capillary was quenched and the H distribution was determined via sectioning and vacuum extraction analysis. The diffusivity was equal to 3.17 x 10-3cm2/s at 1468 and to 3.48cm2/s at 1550C. The results, for 1468 to 1550C, could be fitted by:

D (cm2/s) = 5.00 x 10-2 exp[-9.736(kcal/mol)/RT]

J.H.Wright, M.G.Hocking: Metallurgical Transactions, 1972, 3[7], 1749-53