In this article, the phase compositions, microstructures, and magnetic properties of PrNd-free Ce-Fe-B-based sintered magnets with the nominal composition of (Ce_0.78Y_0.17La_0.05)_16.28Fe_bal.B_7.44M_1.94 (at.%: M = Co, Al, Cu, and Nb) have been investigated. It shows that a lamellar crystalline structure is formed in the Ce-Fe-B-based strip casting (SC) alloy. The Y-substituted Ce-Fe-B-based SC alloy is mainly composed of R₂Fe₁₄B and RFe₂ phases. It suggests that Y substitution is helpful for depressing the $\alpha $ -Fe phase generated in the SC alloy. The island-like intermediate phases exist in the RFe₂ region, which are probably caused by the incomplete peritectic reaction during alloy solidification. The Curie temperature $T_{\mathrm {c}}$ of the Y-substituted Ce-Fe-B-based alloy is about 463 K, which is higher than that of the Ce₂Fe₁₄B compound ( $T_{\mathrm {c}} =424$ K). For the experimental Ce-Fe-B-based sintered magnet without PrNd addition, the remanence $B_{\mathrm {r}}$ of 8.31 kG, the coercivity $H_{\mathrm {cj}}$ of 0.92 kOe, and the maximum energy product (BH)_max of 5.30 MGOe have been obtained. A good combination of coercivity $H_{\mathrm {cj}}$ (= 5.57 kOe) and maximum energy product (BH)_max (= 20.17 MGOe) has been achieved in the Ce-Fe-B-based blended magnet with PrNd/ $\sum $ RE = 25% prepared using a binary main phase (BMP) method. The heterogeneous elemental distributions and microstructure characteristics of the BMP magnet are also analyzed.

中文翻译：

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具有高性能的新型 PrNd-lean Ce 基 R2Fe14B 永磁体

在本文中，标称成分为 (Ce _0.78 Y _0.17 La _0.05 ) _16.28 Fe _bal的无 PrNd Ce-Fe-B 基烧结磁体的相组成、微观结构和磁性能_。已经研究了 B _7.44 M _1.94（_原子百分比：M = Co、Al、Cu 和 Nb）。这表明在 Ce-Fe-B 基带材铸造 (SC) 合金中形成了层状晶体结构。Y-取代Ce-Fe-B基SC合金主要由R ₂ Fe ₁₄ B和RFe ₂相组成。这表明 Y 替代有助于抑制 $\alpha $ -在SC合金中生成的Fe相。RFe ₂区存在岛状中间相，这可能是合金凝固过程中包晶反应不完全所致。居里温度 $T_{\mathrm {c}}$ Y-取代的Ce-Fe-B基合金的约463 K，高于Ce ₂ Fe ₁₄ B化合物（ $T_{\mathrm {c}} =424$ K)。对于不添加 PrNd 的实验性 Ce-Fe-B 基烧结磁体，剩磁 $B_{\mathrm {r}}$ 8.31 kG，矫顽力 $H_{\mathrm {cj}}$ 0.92 kOe，并且获得了 5.30 MGOe的最大能量积 (BH) _max。矫顽力的良好组合 $H_{\mathrm {cj}}$ (= 5.57 kOe) 和最大能量积 (BH) _max (= 20.17 MGOe) 已在具有 PrNd/的 Ce-Fe-B 基混合磁体中实现 $\sum $ RE = 25% 使用二元主相 (BMP) 方法制备。还分析了 BMP 磁体的异质元素分布和微观结构特征。