Structural and Magnetic Study of Hot-Pressed and Hot-Deformed $\hbox {Nd}_{13.5-{\rm x}}\hbox {Ce}_{\rm x}\hbox {Fe}_{80.4}\hbox {Ga}_{0.5}\hbox {B}_{5.6}$ (

Bulk isotropic and anisotropic Nd-Fe-B magnets were synthesized by hot pressing and subsequent hot deforming melt-spun ribbons with addition of Ce using spark plasma sintering (SPS). It was found that Ce addition had a prominent effect on the bulk magnets by changing the structures of the matrix and boundary phase. With Ce-contents increasing, the magnetic properties of hot-pressed magnets increased first, then dropped and peaked at 0.5at.% Ce addition: B_r = 0.83 T, H_cj = 1621 kA/m, (BH)_m = 116 kJ/m³. However, the magnetic properties of anisotropic magnets deteriorated with the Ce-contents increasing.