Determination of the activation energy of nucleation and grain growth in Ni-P metallic glass

Using DSC, we have studied the crystallization kinetics of Ni-P metallic glasses By the Transmission electron microscopy (TEM) image, we have determined the condition of early nucleation saturation in the NI-P crystallization processes and from this the growth activation energy has be determined. According to the Arrhenius equation, the apparent activation energy in the small transformation range can be calculated. By extrapolation we have obtained the activation energy for nucleation (E-n) and growth (E-g). Based on this, the change relation between proportions of nucleation, growth in crystallization and various transformation fraction has been calculated.