Efecto del tiempo de molienda sobre la estabilidad témica del amorfo Mg₅₀Ni₅₀ producido mediante aleado mecáico

In order to study the relationship between the milling time used in the production of Mg₅₀Ni₅₀ amorphous alloy and its thermal stability, seven amorphous alloys were produced by milling for 20, 25, 30, 35, 40, 50 and 60 h each sample. The obtained powders were morphological and structurally characterized by scanning electron microscopy (SEM), Xray diffraction (XRD) and transmission electron microscopy (TEM), respectively. The thermal stability of amorphous alloys was study by differential scanning calorimetry (DSC). Based on the obtained results, it can be concluded that the increase in the added energy when milling for longer time causes the homogenization of the microstructure with an increase in amorphous phase, which dissolves a larger amount of nickel in its structure. Therefore, the simultaneous crystallization of the Mg₂Ni and MgNi₂ intermetallic compounds at 345 °C can be explained.