The migration of Ti in amorphous samples was measured, at 573 to 645K, by using secondary ion mass spectrometry. The experiments were performed on pre-relaxed specimens, and the diffusion coefficients were found to be between 3.0 x 10-24 and 9.0 x 10-21m2/s. The temperature dependence of the diffusivity was of Arrhenius type, and the data (table 154) could be described by:

D (m2/s) = 8.5 x 108 exp[-3.82(eV/atom)/kT]

The results suggested the possible existence of a size-dependence of the diffusivity.

S.K.Sharma, M.P.Macht, V.Naundorf: Physica Status Solidi A, 1991, 126[1], 101-8