Development of high performance Fe-based magnets utilizing computer analysis and crystallization from amorphous state

利用计算机分析和非晶态结晶开发高性能铁基磁体

• 批准号: 08650384
• 负责人: FUKUNAGA Hirotoshi
• 金额: $ 1.6万
• 依托单位: Nagasaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650384/
• 关键词: nanocomposite magnets; spring magnets; coercivity; maximum energy product; intergrain exchange interaction; Nd-Fe-B; crystallization; computer simulation; スプリングマグネット; ナノコンポジットマグネット; 結晶粒径; ナンコンポジットマグネット; 着磁特性; リコイル特性

The following results were obtained by computer simulation for Nd-Fe-B-based nanocomposite magnets.(1) Large maximum energy product is obtained in magnets composed of 60% soft magnetic phases and 40% Nd_2Fe_<14>B with about 20nm grain diameter.(2) Fluctuation of the strength of intetgrain exchange interaction deteriorates magnetic properties of nanocomposite magnets.(3) Two kinds of magnets can be prepared by controlling grain diameter consisting of magnets. One of them has good magnetizability and the other has good recoil properties.Based on the above results, we tried to prepare Nd-Fe-B-based nanocomposite magnets from Nd-Fe-B amorphous alloys. The results are :(1) Good hard magnetic properties were obtained in magnets including 60% soft magnetic phases.(2) In order to suppress fluctuation of the strength of intergrain exchange interaction, magnets with amorphous Fe-Si-B phase between Fe_3B and Nd_2Fe_<14>B phases were prepared. However, an improvement in hard magnetic properties was not achieved because the grain diameter and the amount of soft magnetic phases did not satisfy the above-mentioned conditions.(3) Two kinds of magnets, magnets with good magnetizability or those with good recoil properties, were prepared by controlling crystallization condition of amorphous Nd-Fe-B alloys.

通过计算机模拟Nd-Fe-B基纳米复合磁体得到了以下结果：(1)由60%软磁相和40%Nd_2Fe_<14>B组成、粒径约为20nm的磁体获得了较大的最大磁能积。(2)晶粒间交换相互作用强度的波动使纳米复合磁体的磁性能恶化。(3)通过控制可以制备两种磁体。 由磁铁组成的颗粒直径。其中一种具有良好的磁化性能，另一种具有良好的反冲性能。基于上述结果，我们尝试用Nd-Fe-B非晶合金制备Nd-Fe-B基纳米复合磁体。结果是:(1)软磁相含量为60%的磁体获得了良好的硬磁性能。(2)为了抑制晶间交换相互作用强度的波动,制备了在Fe_3B相和Nd_2Fe_14B相之间具有非晶Fe-Si-B相的磁体。然而，由于晶粒直径和软磁相含量不满足上述条件，因此未能实现硬磁性能的提高。(3)通过控制非晶Nd-Fe-B合金的结晶条件，制备了具有良好磁化性能和具有良好反冲性能的两种磁体。

项目成果

H. Fukunaga, N. Kitajima, and Y. Kanai: "Computer Simulaion of Magnetic Properties of Nanocomposite Nagnets" Materials Transactions, JIM. 37. 864-869 (1996)

H. Fukunaga、N. Kitajima 和 Y. Kanai：“纳米复合材料磁性的计算机模拟”Materials Transactions，JIM。

H.Fukunaga,N.Kitajima.and Y.Kanai: "Computer Simulaion of Magnetic Properties of Nanocomposite Magnets" Materials Transactions,JIM. 37. 864-869 (1996)

H.Fukunaga、N.Kitajima. 和 Y.Kanai：“纳米复合磁体磁性的计算机模拟”Materials Transactions，JIM。

J. Kuma, N. Kitajima, Y. Kanai, and H. Fukunaga: "Maximum Energy Product of lsotropic Nd-Fe-B-Based Nanocomposite Magnets" Journal of Applied Physics. 83(掲載予定). (1998)

J. Kuma、N. Kitajima、Y. Kanai 和 H. Fukunaga：“同向 Nd-Fe-B 基纳米复合磁体的最大能量积”，《应用物理学杂志》83（待出版）。

熊純哉,北島望,金井泰久,福永博俊: "ナンコンポジット磁石の磁気特性の計算機解析" 第20回日本応用磁気学会学術講演会概要集. 95- (1996)

Junya Kuma、Nozomi Kitajima、Yasuhisa Kanai、Hirotoshi Fukunaga：“纳米复合磁体磁性的计算机分析”日本应用磁学学会第 20 届学术会议摘要 95-（1996）。

H.Fukunaga et al.: "Stability of a Nd-Fe-B based magnet consolidated from a mixture of isotropic and anisotropic powders" J.Magnetism and Magnetic Materials. 157/158. 63-64 (1996)

H.Fukunaga 等人：“由各向同性和各向异性粉末混合物固结而成的 Nd-Fe-B 基磁体的稳定性”J.Magnetism and Magnetic Materials。