A study was made of Ni diffusion, in single-grained samples of the icosahedral quasicrystalline compound, at 699 to 1074K. A radiotracer technique, together with serial sectioning, was used to determine the concentration versus depth profiles. No deviation from Arrhenius behaviour was detected over the above temperature range, and the results could be described by:

D (cm2/s) = 5.3 x 101 exp[-49.8(kcal/mol)/RT]

T.Zumkley, H.Nakajima, T.A.Lograsso: Philosophical Magazine A, 2000, 80[5], 1065-74