The diffusivity was deduced at between 205 and 280C by measuring boriding and de-boriding rates. It was found that the results could be described by:

D (m2/s) = 3.1 x 10-6 exp[-19200/RT]

These data were compared with previous results obtained by using other methods.

H.Brodowsky, H.Sagunski: Zeitschrift für Physikalische Chemie, 1984, 139[1], 149-52