Calorimetric study and Kissinger analysis of melt-spun DyMn6−Ge6−Fe Al (1 ⩽x⩽ 2.5) alloys

Abstract Thermal properties of rapidly quenched alloys from the DyMn 6− x Ge 6− x Fe x Al x (1 ⩽ x ⩽ 2.5) series produced by melt-spinning have been investigated by differential scanning calorimetry (DSC). The DSC curves show two exothermic effects connected with crystallization processes. Crystallization temperatures and enthalpies Δ H have been estimated. The systematic changes in these parameters allow concluding that the crystallization exothermic events are independent. Effective activation energies E have been determined using the Kissinger analysis and relatively high values up to 480 ± 20 kJ/mol for DyMn 4 Ge 4 Fe 2 Al 2 have been found indicating high thermal stability of the amorphous state in this alloy series.