Migration in the metallic glass was studied at 575 to 645K by using Rutherford back-scattering spectrometry. The diffusivities were deduced by fitting an error function to the tail region of the concentration profiles. The diffusion of Au was studied in relaxed and pre-crystallized specimens. The diffusivity (table 44) could be described by:

as-quenched:     D (m2/s) = 10-10.33 exp[-1.20(eV)/kT]

relaxed:     D (m2/s) = 10-10.05 exp[-1.23(eV)/kT]

pre-crystallized:     D (m2/s) = 10-9.43 exp[-1.23(eV)/kT]

It was concluded that relaxation treatments had an insignificant effect upon the diffusivity, whereas appreciably higher diffusion rates were found in pre-crystallized specimens.

S.K.Sharma, S.Banerjee, Kuldeep, A.K.Jain: Acta Metallurgica, 1988, 36[7], 1683-90