The role of combined addition of Ti and B in magnetic hardening of devitrified Pr2Fe14B/(Fe3B,α‐Fe) nanocomposite magnets
The role of combined addition of Ti and B in magnetic hardening of devitrified Pr2Fe14B/(Fe3B,α‐Fe) nanocomposite magnets
复制标题
Ti和B联合添加对失透Pr2Fe14B/(Fe3B,α-Fe)纳米复合磁体磁硬化的作用
DOI：
10.1002/pssa.200622546
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
H. Ehrenberg
中科院分区：
文献类型：
--
作者：
W. Zhang;M. Stoica;J. Eckert;H. Chang;W. Chang;H. Ehrenberg
采用非晶Pr 9 Fe 88.5-xTi2.5Bx（x = 7，9，11，13，15）薄带的失透法制备了高矫顽力的Pr 2Fe 14 B/（Fe 3B，α-Fe）纳米复合永磁材料。类似于Zr和Nb，Ti取代稀土位点并参与形成（Pr，Ti）2Fe 14 B相。随着x的增加，纳米复合磁体中的TiB 2的量增加，可沿晶界沿着析出，并通过抑制晶粒生长来细化显微组织，从而导致矫顽力的持续增加。这也导致纳米复合材料中的软相的分数增加，这增强了剩磁。加入适量的B也改善了退磁曲线的方形度。结果，当x = 13时，能量积达到最大值129.6 kJ/m3。与x = 7的样品相比，x = 15的样品在70 K的滞后曲线中观察到更明显的肩部和显著增强的矫顽力（2424 kA/m）。这进一步证明了B的添加促进了TiB 2和Fe 3 B软相的形成，与XRD结果良好一致。因此，适量的α-Fe_3O_4相的引入可以提高纳米复合磁体的磁性能。（© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
Pr2Fe14B/(Fe3B,α‐Fe) nanocomposite magnets with high coercivity have been prepared by devitrification of Pr9Fe88.5–x Ti2.5Bx (x = 7, 9, 11, 13, and 15) amorphous ribbons. Similar to Zr and Nb, Ti substitutes rare earth sites and participates in forming the (Pr,Ti)2Fe14B phase. The increasing amount of nonmagnetic TiB2 with increasing x in the nanocomposite magnets may precipitate along the grain boundaries and refine the microstructure by inhibiting the grain growth, and results in a continuous increase of coercivity. It also leads to an increase of the fraction of soft phases in the nanocomposites, which enhances the remanence. The squareness of the demagnetization curves is also improved by appropriate B addition. As a result, the energy product attains a maximum value of 129.6 kJ/m3 for x = 13. A more obvious shoulder and significantly enhanced coercivity (2424 kA/m) in the hysteresis curves at 70 K was observed for the sample with x = 15 in comparison with the ribbon with x = 7. This further demonstrates that B addition promotes the formation of TiB2 and the Fe3B soft phase in good agreement with XRD results. Accordingly, the introduction of a proper amount of nonmagnetic phases can enhance the magnetic properties of the nanocomposite magnets. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
影响因子：
2.7
作者：
S. Hirosawa;H. Kanekiyo;T. Miyoshi
通讯作者：
S. Hirosawa;H. Kanekiyo;T. Miyoshi
影响因子：
3.2
作者：
Bauer, J;Seeger, M;Kronmuller, H
通讯作者：
Kronmuller, H
(Fe,Co)-Nb-Hf-Y-B大块金属玻璃的制备及性能
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Naruse K;Sakai Y;Guo L;Natori T;Shindoh J;Karasawa Y;Iida Y;Kojima K;Michishita K;Makuuchi M.;邵 勇
通讯作者：
邵 勇