Measurement of Enthalpy Relaxation in a Metallic Glass Pd77.5Cu6.0Si16.5

Enthalpy relaxation in amorphous Pd77.5Cu6.0Si16.5 in sub-Tg temperature region was studied by differential scanning calorimetry (DSC). Enthalpy change due to annealing, which was measured by deducting the effect of glass transition, increased gradually to a saturated value with increasing annealing time (ta). At lower temperatures, enthalpy relaxation exhibited two-stage in ta dependence.