Phase Formation, Microstructure, and Magnetic Properties of Nd(14.5)Fe(79.3)B(6.2) Melt-Spun Ribbons with Different Ce and Y Substitutions

Phase formation and microstructure of (Nd(1-2x)Ce(x)Y(x))(14.5)Fe(79.3)B(6.2) (x = 0.05, 0.10, 0.15, 0.20, 0.25) alloys were studied experimentally. The results reveal that (Nd(1-2x)Ce(x)Y(x))(14.5)Fe(79.3)B(6.2) annealed alloys show (NdCeY)(2)Fe(14)B phase with the tetragonal Nd(2)Fe(14)B-typed structure (space group P4(2)/mnm) and rich-RE (α-Nd) phase, while (Nd(1-2x)Ce(x)Y(x))(14.5)Fe(79.3)B(6.2) ribbons prepared by melt-spun technology are composed of (NdCeY)(2)Fe(14)B phase, α-Nd phase and α-Fe phase, except for the ribbon with x = 0.25, which consists of additional CeFe(2) phase. On the other hand, magnetic properties of (Nd(1-2x)Ce(x)Y(x))(14.5)Fe(79.3)B(6.2) melt-spun ribbons were measured by a vibrating sample magnetometer (VSM). The measured results show that the remanence (B(r)) and the coercivity (H(cj)) of the melt-spun ribbons decrease with the increase of Ce and Y substitutions, while the maximum magnetic energy product ((BH)(max)) of the ribbons decreases and then increases. The tendency of magnetic properties of the ribbons could result from the co-substitution of Ce and Y for Nd in Nd(2)Fe(14)B phase and different phase constitutions. It was found that the H(cj) of the ribbon with x = 0.20 is relatively high to be 9.01 kOe, while the (BH)(max) of the ribbon with x = 0.25 still reaches to be 9.06 MGOe. It suggests that magnetic properties of Nd-Fe-B ribbons with Ce and Y co-substitution could be tunable through alloy composition and phase formation to fabricate novel Nd-Fe-B magnets with low costs and high performance.