The evidence of structural relaxation as the origin of Curie temperature aging in metallic glass

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Abstract
Kinetics of both isothermal Curie temperature aging and enthalpy recovery of a metallic glass (Fe0.5Ni0.5)75P16B6Al3 near the glass temperature obey approximately a logt law, where t is the annealing time. The frequency factors ke of the first‐order rate reaction were obtained by assuming the configurational entropy as the rate determining factor. ke’s obtained agree reasonably with the temperature dependence of viscous flow. This is evidence that Curie temperature aging and thermal heat recovery of metallic glasses have the same origin, associated with structural relaxation, and can be described by the entropy model of viscous flow.