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In the present work the magnetic properties and phase constitution of (Nd10Fe67B23)100−xNbx (where x = 1, 2, 3, 4) alloys in a form of ribbons were investigated. The ribbon samples were obtained by controlled atmosphere melt-spinning technique. In order to generate the nanocrystalline microstructure, ribbons were annealed at various temperatures (from 923 K to 1023 K) for 5 min. Subsequent annealing resulted in an evolution of the phase constitution accompanied by a change of their magnetic properties. The X-ray di raction studies show presence of hard magnetic Nd2Fe14B, paramagnetic Nd1+εFe4B4 and ferromagnetic metastable Nd2Fe23B3 phases. The best hard magnetic parameters were measure for annealed ribbons of the (Nd10Fe67B23)96Nb4 alloy.

Magnetic Properties and Phase Constitution of the Nanocrystalline (Nd10Fe67B23)100-xNbx(where x=1, 2, 3, 4) Alloy Ribbons