Partially or fully amorphous Al89
alloys were prepared by melt spinning. The amorphous to crystalline and subsequent transitions were studied with X-ray diffraction, electrical resistivity, thermal and microhardness measurements. The transformation kinetics were analysed in terms of the classical and the generalized Johnson¯
Kolmogorov models for nucleation and growth processes. In amorphous Al89
, crystallization begins with
(fcc Al) formation closely followed by
Dy), which transforms to
Dy). Addition of Co increases the stability of the amorphous states. The first crystallization process in the ternary alloys is eutectic-like; nanocrystals are present in Al84
. Annealing in the region of structural relaxation retards subsequent crystallization.