Abstract
Density of glass-forming Fe-B- and Co-B-based alloys in amorphous and crystalline states was studied in a temperature range of 20-900°C. The temperature dependences for the amorphous and crystalline samples were calculated from the results of dilatometry. The room-temperature density was determined by hydrostatic weighing. It was found that, after crystallization, the ribbons transform to a stable non-equilibrium crystalline state with density that is lower than that of the corresponding as-cast bulk alloys. Transition to the state with the equilibrium value of density is completed upon annealing at temperatures close to solidus temperatures.
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