Abstract
Sets of amorphous Fe-Ni-Cr-P-B, Fe-Ni-Mo-B, Fe-B-C alloys have been prepared by melt spinning using different rotation speeds of the wheel. The enthalpy of relaxation, the glass transition temperature Tg, the crystallization temperature are studied as a function of quenching rate. Structural relaxation takes place continuosly in a wide temperature range from 420–450 K up to the Tg region (650–670 K) and it is governed by a spectrum of activation energy described by the heat evolution curve at constant heating rate. The chemical and topological contribution to structural relaxation are separated by means of suitable thermal treatments.
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