Large-grained specimens of body-centered 19%Nb cubic alloy were studied at 620 to 1173K. The diffusion profiles were determined by means of secondary ion mass spectrometry. The data exhibited a smooth temperature-dependent behavior across the monotectoid temperature (875K) and could be described by:

D(m2/s) = 10-9exp[-1.4(eV)/kT]

H.Zou, G.M.Hood, R.J.Schultz, N.Matsuura, J.A.Roy: Journal of Nuclear Materials, 1996, 230[1], 36-40