Abstract
The microstructure of the two-phase nanocomposites Nd 12.6Fe 81.4B 6/37.5 vol.% α-Fe and Nd 12.6Fe 80.9Zr 0.5B 6/37.5 vol.% α-Fe magnets has been investigated by atomic force microscopy. The required structure was achieved by mechanical alloying of elemental powders and further heat treatment at different temperatures. The nanocomposites with addition of Zr are characterized by smaller grains and a narrower grain size distribution than without Zr. Differences in grain size after different conditions of experiments were clearly and easily identified by AFM. A Nd 12.6Fe 80.9Zr 0.5B 6/37.5 vol.% α-Fe nanocomposite with an average grain size of ∼19 nm has been produced. The grains combine together in agglomerates with a size of ∼250 nm. The AFM height mode image presentation is more accurate for agglomerate analysis, deflection for grain analysis.
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