Effect of Ball Size on the Microstructure and Morphology of Mg Powders Processed by High-Energy Ball Milling
2021
Ríos Arbeláez, Jesús María | Restrepo Carvajal, Alex Humberto | Zuleta Gil, Alejandro Alberto | Bolívar Osorio, Francisco Javier | Castaño González, Juan Guillermo | Correa Bedoya, Esteban Alberto | Echeverría Echeverría, Félix
ABSTRACT: Commercial powders of pure magnesium were processed by high-energy ball milling. The microstructural and morphological evolution of the powders was studied using scanning electron microscopy (SEM), energy dispersive spectrometry (EDX) and X-ray diffraction (XRD). From the results obtained, it was determined that the ball size is the most influential milling parameter. This was because balls of 1 mm diameter were used after a previous stage of milling with larger balls (i.e., 10 and 3 mm). The powder particles presented an unusual morphology with respect to those observed in the Mg-milling literature and recrystallization phenomena. Moreover, the result strongly varied depending on the ball-to-powder weight ratio (BPR) used during the milling process.
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