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Effect of C on Phase Evolution, Microstructure, and Magnetic Properties of Pr2Fe14B-Type Nanocomposites

机译：C对Pr2Fe14B型纳米复合材料的相变，微观结构和磁性的影响

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摘要

The phase evolution, microstructure and magnetic properties of melt-spun Pr-rich Pr11FebalB8-yCy, (y = 0-8) and Pr-lean Pr9Febal.TixB11-yCy (x = 0, 2.5 and 4; y = 0-11) ribbons have been investigated intensively. A slight substitution of C for B (y=2) was proven to be effective in improving the magnetic properties of Pr-rich Pr11FebalB8-yCy nanocomposites. C atoms prefers to enter 2:14:1 phase in forming Pr2Fe14(B, C). But the volume fraction of Pr2Fe17Cz, α-Fe and 1:2 carbide increases, due to the dissociation of 2:14:1 phase and the suppression of Fe2B phase, with further increase of carbon content. The optimal magnetic properties of Br = 9.4 kG, iHc = 9.3 kOe, and (BH)max = 17.3 MGOe were obtained for Pr11FebalB6C2. In contrast, the increase of C substitution in Pr9Febal.Ti2.5B11-yCy (y=0-11) ribbons degrades the Br, iHc and (BH)max monotonically, which is arisen from the increase of vol % of Pr2Fe17Cz and α-Fe phases, and the rapid decrease of 2:14:1 phase. In comparison with those of Pr9FebalB11-yCy(y=0-5.5) ribbons, improved magnetic properties of (BH)max=153-17.8 MGOe with higher coercivity of iHc=9.7-10.8 kOe have been obtained in Ti-containing PT9Febal.Ti2.5B11-yCy (y=0-5.5) ribbons. However, in higher Ti concentration Pr9Febal.Ti4B11-yCy, ribbons, a slight substitution of C for B (y = 0.5-1) is beneficial in improving the coercivity and magnetic energy product, simultaneously. The optimal properties of Br = 9.4 kG, iHc = 11.1 kOe, (BH)max = 18.0 MGOe and α = -0.146 %/℃, β = -0.576 %/℃ were achieved in Pr9FebalTi4B10.5C0.5 nanocomposites.
机译：熔融纺丝富Pr的Pr11FebalB8-yCy（y = 0-8）和贫Pr的Pr9Febal.TixB11-yCy（x = 0、2.5和4; y = 0-11）的相变，微观结构和磁性能。色带已被深入研究。事实证明，用C代替B（y = 2）可以有效地改善富含Pr的Pr11FebalB8-yCy纳米复合材料的磁性能。 C原子倾向于在形成Pr2Fe14（B，C）时进入2：14：1相。但是，由于2：14：1相的解离和Fe2B相的抑制，Pr2Fe17Cz，α-Fe和1：2碳化物的体积分数增加，碳含量进一步增加。对于Pr11FebalB6C2，获得了最佳的磁性（Br = 9.4 kG，iHc = 9.3 kOe，（BH）max = 17.3 MGOe）。相反，Pr9Febal.Ti2.5B11-yCy（y = 0-11）碳带中C取代的增加单调降解了Br，iHc和（BH）max，这是由于Pr2Fe17Cz和α-铁相，并以2：14：1相迅速减少。与Pr9FebalB11-yCy（y = 0-5.5）碳带相比，在含Ti的PT9Febal.Ti2中获得了改善的（BH）max = 153-17.8 MGOe磁性和iHc = 9.7-10.8 kOe的更高矫顽力。 .5B11-yCy（y = 0-5.5）色带。但是，在较高的Ti浓度Pr9Febal.Ti4B11-yCy中，薄带中的C稍微取代B（y = 0.5-1）有利于同时提高矫顽力和磁能积。在Pr9FebalTi4B10.5C0.5纳米复合材料中实现了Br = 9.4 kG，iHc = 11.1 kOe，（BH）max = 18.0 MGOe和α= -0.146％/℃，β= -0.576％/℃的最佳性能。

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  • 来源
    《》|2006年|136-145|共10页
  • 会议地点 Beijing(CN);Beijing(CN)
  • 作者

    C.H.Chiu; H.W.Chang; C.W.Chang; W.Y.Zhang; W.C.Chang;

  • 作者单位

    Department of Physics, National Chung Cheng University, Taiwan, China;

    Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan, China;

    Department of Physics, National Chung Cheng University, Taiwan, China;

    FG Physikalische Metallkunde, FB 11 Material- und Geowissenschaften, Technische UniversitSt Darmstadt, Petersenstrasse 23, D-64287 Darmstadt, Germany;

    Department of Physics, National Chung Cheng University, Taiwan, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PrFeB; PrFeC; permanent magnet; nanocomposite; melt spinning; exchange-coupling;

    机译：PrFeB; PrFeC;永磁体;纳米复合材料;熔融纺丝;交换耦合;

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