Abstract
Nd-Fe-B amorphous alloy powders produced by rapid solidification processing were mechanically ground in an argon atmosphere. The resultant powders and those annealed powders were examined by X-ray diffraction, differential scanning calorimetry, and vibrating sample magnetometer. The crystallization temperature of Nd-Fe-B amorphous alloy powders decreased as the milling time increased. It was found that the crystallization of a-iron from amorphous matrix took place in the extended milling. Heat treatment of the resultant powders resulted in the formation of Nd2Fe14B ferromagnetic phase regardless of the milling time. The resultant Nd-Fe-B powders had a slightly high remanence value compared to those obtained from the original melt-spun counterparts.
