Progress of the amorphization reaction during mechanical alloying in Fe-Zr

Abstract

The amorphization process in mechanically alloyed Fe-Zr powders has been investigated by optical and scanning electron microscopy, x-ray diffraction, differential scanning calorimetry, and saturation magnetization measurements. The transformation from the initially layered composite to the amorphous alloy occurs between 2 and 16 h milling time. Longer milling leads to a homogenization within the particles. Prior to amorphization the internal stress within the powder particles strongly increases.