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Abstract：
The more effective use of readily available Ce in FeNdB sintered magnets is an important step towards more resource-efficient, sustainable, and cost-effective permanent magnets. These magnets have the potential to bridge the gap between high-performance FeNdB and hard ferrite magnets. However, for higher degrees of cerium substitution (>25%), the magnetic properties deteriorate due to the lower intrinsic magnetic properties of Fe14Ce2B and the formation of the Laves phase Fe2Ce in the grain boundaries. In this paper, sintered magnets with the composition Fe70.9-(CexNd1-x)18.8-B5.8-M4.5 (M = Co, Ti, Al, Ga, and Cu; with Ti, Al, Ga, and Cu less than 2.0 at% in total and Cobal; x = 0.5 and 0.75) were fabricated and analyzed. It was possible to obtain coercive fields for higher degrees of Ce substitution, which previous commercially available magnets have only shown for significantly lower degrees of Ce substitution. For x = 0.5, coercivity, remanence, and maximum energy product of µ0Hc = 1.29 T (Hc = 1026 kA/m), Jr = 1.02 T, and (BH)max = 176.5 kJ/m3 were achieved at room temperature for x = 0.75 µ0Hc = 0.72 T (Hc = 573 kA/m), Jr = 0.80 T, and (BH)max = 114.5 kJ/m3, respectively.
摘要：
在FeNdB烧结磁体中更有效地使用现成的Ce是朝着更高的资源效率迈出的重要一步，可持续,和具有成本效益的永磁体。这些磁体具有桥接高性能FeNdB和硬铁氧体磁体之间的间隙的潜力。然而,对于更高的铈取代度(>25%)，由于Fe14Ce2B的较低的固有磁性和晶界中Laves相Fe2Ce的形成，磁性能恶化。在本文中,组成为Fe70.9-（CexNd1-x）18.8-B5.8-M4.5（M=Co，Ti,Al,Ga,和Cu；与Ti，Al,Ga,和总含量小于2.0原子%的Cu和Cobal;x=0.5和0.75)被制造和分析。有可能获得更高程度的Ce取代的矫顽场，先前市售的磁体仅显示出显著较低程度的Ce取代。对于x=0.5，矫顽力，剩磁,最大能量乘积为µ0Hc=1.29T（Hc=1026kA/m），Jr=1.02T,x=0.75µ0Hc=0.72T(Hc=573kA/m)时，在室温下达到(BH)max=176.5kJ/m3，Jr=0.80T,(BH)max=114.5kJ/m3。
