Composition dependence of magnetic properties of directly quenched Nd–Fe–Ti–Zr–B bulk magnets

Comparison on the magnetic properties, phase evolution and microstructure of directly quenched Pr–Fe–Ti–B-based ribbons and rods

“…Since a slight substitution of 0.5 at.% Zr for Ti could improve magnetic properties of directly cast Nd 9.5 Fe 72.5 Ti 3 B 15 magnet due to the grain refinement by Zr substitution [18], Zr element of 0.5 at.% is selected to dope into Pr x Fe 82Àx Ti 2.5 B 15 bulk magnets in order to improve their magnetic properties. Magnetic properties of Pr x Fe 82Àx Ti 2.5 Zr 0.5 B 15 rods are shown in Fig.…”

“…On the other hand, large volume fraction of Nd 2 Fe 14 B phase with fine grain size and grain boundary phase were obtained by B content modification and the multi-component refractory element substitutions, i.e. Ti, Zr, Cr, and C [17][18][19][20]. Consequently, high i H c = 7.7-13.4 kOe and (BH) max = 6.8-8.7 MGOe could be attained simultaneously for directly cast Nd 9.5 Fe bal.…”

“…Consequently, high i H c = 7.7-13.4 kOe and (BH) max = 6.8-8.7 MGOe could be attained simultaneously for directly cast Nd 9.5 Fe bal. M y B 15Àz C z (M = Ti, Ti + Zr, Ti + Zr + Cr; y = 3-4; z = 0.5) magnets with various diameter of 0.7-1.1 mm [17][18][19][20].…”

Magnetic properties, phase and microstructure of direct cast Nd9.5Febal.Co10MB15 rod magnets

“…Recently, high coercivity (iHc410 kOe) of Nd-Fe-B bulk magnets has been obtained by the addition of Zr, Nb and Ti elements. Furthermore, the diameter of rod has been increased to 1.3 mm, and the (BH) max can be as high as 6.8-8.4 MGOe [10][11][12]. To suit for application, the diameter and magnetic energy product of the cylindrical magnets need to be further improved.…”

Effect of Co addition on the microstructure and magnetic properties of Nd9.5Febal.CoxNb2.5Zr0.5B15 (x=0, 10, 20) bulk magnets

“…Furthermore, the diameter of rod have been increased to 1.3 mm, and the (BH) max can be as high as 6. 8-8.4 MGOe [10][11][12]. To suit for application, the diameter and maximum energy product of the cylindrical magnets need to be further improved.…”