Exceptional elevated temperature behavior of nanocrystalline stoichiometric Y2Fe14B alloys with La or Ce substitutions

Magnetic properties and rare earth element diffusion behavior of hot-deformed nanocrystalline dual-main-phase Nd–Ce–Fe–B magnets

“…Consequently, a few Nd diffuse into Ce-rich 2 : 14 : 1 phase, and it is beneficial for hard magnetic properties due to the higher intrinsic magnetic properties of Nd 2 Fe 14 B. 10 In addition, 1 : 2 phase was not observed in magnet with low Ce–Fe–B addition, which as shown in XRD analysis results, so the distribution of Nd in Ce-rich grain boundary phase is beneficial to inhibits the precipitation of 1 : 2 phase other than increases the thickness and continuity of grain boundary phases. 36 The modified grain boundary phase in Ce-rich region by Nd diffusion and the distribution of Nd in Ce-rich 2 : 14 : 1 phase are beneficial for hard magnetic properties.…”

“…To fabricate costeffective RE-Fe-B permanent magnets and efficiently utilize RE resources, the Ce-based or Ce-containing RE-Fe-B magnets have received much attention in recent years. [5][6][7][8] Although early studies have shown that the intrinsic magnetic properties of Ce 2 Fe 14 B compound are inferior to those of Nd 2 Fe 14 B, [9][10][11] Ce-Fe-B based magnets are still potential candidates for the permanent magnets with hard magnetic properties higher than hard ferrites.…”

Nd2Fe14B permanent magnets substituted with non-critical light rare earth elements (Ce, La): A review

“…Conversely to La, Yttrium preferentially enters the T1 and raises the Curie point (Tc of Y2Fe14B = 571 K). It also improves the remanence [49], owing to the stabilization of the amorphous phase during annealing, and also the coercive field stability with temperature [50]. Simultaneous replacement of a part of Ce by La and Y allows combining the beneficial effects of these two elements on the magnetic performances: a drastic reduction of the temperature coefficients have been found in [43] for [(Ce0.7La0.3)0.5Y0.5]17Fe78B6 (at.…”

Exploring Ho substituted Y-Fe-B nanocrystalline alloys and hot worked magnets

“…However, its excellent thermal stability could not be maintained due to the incorporation of large amounts of Nd. Liao et al [14] found that La-substitution is unfavorable to the magnetic properties of (Y 1−x La x ) 2 Fe 14 B alloys (x = 0-0.5), but the better thermal stability can be obtained due to the unusual increased H cj with increasing temperature. (Y 1−x Ce x ) 2 Fe 14 B alloys and (Y 1−x La x ) 2 Fe 14 B alloys exhibit opposite changes of the room-temperature magnetic properties or elevated temperature behavior with Ce and La concentration, respectively.…”