Magnetic properties of nanocrystalline didymium (Nd–Pr)–Fe–B alloys
Magnetic properties of nanocrystalline didymium (Nd–Pr)–Fe–B alloys
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纳米晶镨 (Nd-Pr)-Fe-B 合金的磁性能
DOI：
10.1063/1.369911
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发表时间：
1999
影响因子：
3.2
通讯作者：
H. Davies
中科院分区：
文献类型：
--
作者：
H. Davies
本文介绍并讨论了 Nd:Pr 比例和 Fe: 镨（其中镨是 Nd 和 Pr 的混合物）比例对纳米晶熔纺镨-Fe-B 合金磁性能影响的系统研究的初步结果。研究了对应于镨2Fe14B（Nd:Pr 比例为 1:3、1:1 和 3:1）的化学计量组成以及合金系列镨 Fe94−yB6（y=8、10、12 和 14 at %）。对于所研究的所有成分，都观察到剩磁和磁能积的增强，这是由于 RE2Fe14B 微晶（通常平均直径~40 nm）之间的晶粒间交换耦合所致，对于非化学计量合金，也是由于 RE2Fe14B 和 α-Fe 晶粒之间的晶间交换耦合所致。 (Pr0.75Nd0.25)2Fe14B 合金观察到 (BH)max(185 kJ m−3) 和内禀矫顽力 (810 kA/m) 的出色组合。
The initial results of a systematic study of the effects of Nd:Pr ratio and Fe:didymium (where didymium is a mixture of Nd and Pr) ratio on the magnetic properties of nanocrystalline melt spun didymium–Fe–B alloys are presented and discussed. The stoichiometric composition, corresponding to didymium2Fe14B, with Nd:Pr ratios of 1:3, 1:1, and 3:1 and the alloy series didymiumy Fe94−yB6, with y=8, 10, 12, and 14 at % were investigated. Enhancement of remanence and energy product was observed for all compositions studied, arising from intergrain exchange coupling between the RE2Fe14B crystallites (generally having a mean diameter ∼40 nm) and, for the off-stoichiometric alloys, also between the RE2Fe14B and α-Fe grains. An excellent combination of (BH)max(185 kJ m−3) and intrinsic coercivity (810 kA/m) was observed for the (Pr0.75Nd0.25)2Fe14B alloy.