Unusual effects of Ti and C additions on structural and magnetic properties of Nd–Fe–B nanocomposite magnets in a B-rich and Nd-poor composition range
Unusual effects of Ti and C additions on structural and magnetic properties of Nd–Fe–B nanocomposite magnets in a B-rich and Nd-poor composition range
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DOI：
10.1016/j.jmmm.2004.03.046
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发表时间：
2004-10
影响因子：
2.7
通讯作者：
S. Hirosawa;H. Kanekiyo;T. Miyoshi
中科院分区：
文献类型：
--
作者：
S. Hirosawa;H. Kanekiyo;T. Miyoshi
研究了Ti和C添加剂对富B和贫Nd成分范围内采用快速凝固和后续退火工艺制备的FexB/Nd 2Fe 14 B型纳米复合永磁体（x=3或23 6）的结构和磁性能的影响。添加Ti抑制初生Fe的形成，促进铁磁性铁硼化物的形成。碳的加入对晶粒细化和抑制TiB 2的不利形成是有效的，从而导致磁性能的改善。成分调整已经产生了一系列Fex B/Nd 2 Fe 14 B型各向同性纳米复合永磁体，其在成分范围B >10 at %和Nd <10 at %中具有与近单相各向同性熔纺磁体相当的磁性能。
Effects of Ti and C additions on structural and magnetic properties of FexB/Nd2Fe14B-type nanocomposite permanent magnets (x=3 or 23 6 ) prepared by means of rapid solidification and subsequent annealing in a B-rich and Nd-poor composition range are reported. Addition of Ti suppresses formation of primary Fe and promotes formation of ferromagnetic iron-borides. Carbon addition is effective for grain refinement and suppression of unfavorable formation of TiB2, resulting in improvement of magnetic properties. Compositional adjustments have yielded a series of FexB/Nd2Fe14B-type isotropic nanocomposite permanent magnets with magnetic performance comparable to near-single-phase isotropic melt-spun magnets in a composition range B >10 at % and Nd <10 at % .