Crystallization of Aluminum droplet at low undercooling: homogeneous nucleation approach

Crystallization in an undercooled Aluminum (Al) droplet occurs via the formation of crystalline nuclei by homogeneous or heterogeneous nucleation and successive growth nuclei. Clusters a new phase appear system due to fluctuations after reaching critical size grow up microscopic size. event at low undercooling 6.4°C 9.91 mg compact Al sample was detected using isothermal differential scanning calorimetry (DSC) several tenths minutes. In this case, standard analysis based on Johnson-Mehl-Avrami-Kolmogorov (JMAK) model is not appropriate as Avrami parameter n obtained fitting DSC data too ( ≤ 1 thus dimensionality d = – 0). rate extremely high that why we presume time delay crystallization, DSC, slightly higher than delay. A applied determine basic characteristics nucleation: distribution nuclei, rate, total number crystallization fraction process. The atoms liquid decreases with occurs. As consequence, decrease stationary It shown predominantly caused subcritical clusters.