Abstract
Thermal expansion and structural relaxation during annealing of various metallic glass ribbons has been measured in a specially designed dilatometer avoiding any transfer rods and any tensile stress on the specimen. The spectra of activation energies for atomic rearrangements during structural relaxation up to crystallisation are determined for Fe40Ni40B20, Co66Fe4(MoSiB)30 and Ni78Si8B14 alloys. The relaxation behaviour of specimens cut from different positions in a 50 mm wide ribbon of Ni72Si8B20 indicates different cooling characteristics in the centre and near the edges of the ribbon, and a pronounced anisotropy along and perpendicular to the ribbon axis.
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