| Positron Annihilation Behaviors and Magnetic Properties of Single-phase Nd2Fe14B and Nanocomposite Nd2Fe14B／α- Fe Magnets |
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| 引用本文： | DingkangXIONG XiaokaiSUN LiangyueXIONG WeiLIU TongZHAO ZhidongZHANG. Positron Annihilation Behaviors and Magnetic Properties of Single-phase Nd2Fe14B and Nanocomposite Nd2Fe14B／α- Fe Magnets[J]. 材料科学技术学报, 2001, 17(4): 453-456 |
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| 作者姓名： | DingkangXIONG XiaokaiSUN LiangyueXIONG WeiLIU TongZHAO ZhidongZHANG |
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| 作者单位： | InstituteofMetalResearch,ChineseAcademyofSciences,Shenyang110015,China |
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| 摘 要： | Positron annihilation behaviors have been studied in the single phase Nd2Fe14B magnet and the nanocomposite Nd2Fe14B/α-Fe magnet, prepared by melt spinning. The results showed that the number of vacancy-cluster at grain boundaries increases with increasing annealing temperature for the both types of magnets. The increase of this kind of defect can improve the coercivity of
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| 关 键 词： | 正电子歼灭 单阶磁性 Nd2Fe14B 磁铁 |
| 收稿时间： | 2000-02-25 |
Positron annihilation behaviors and magnetic properties of single-phase Nd2Fe14B and nanocomposite Nd2Fe14B/alpha-Fe magnets |
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| Dingkang XIONG,Xiaokai SUN,Liangyue XIONG,Wei LIU,Tong ZHAO,Zhidong ZHANG. Positron annihilation behaviors and magnetic properties of single-phase Nd2Fe14B and nanocomposite Nd2Fe14B/alpha-Fe magnets[J]. Journal of Materials Science & Technology, 2001, 17(4): 453-456 |
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| Authors: | Dingkang XIONG Xiaokai SUN Liangyue XIONG Wei LIU Tong ZHAO Zhidong ZHANG |
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| Affiliation: | Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China |
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| Abstract: | Positron annihilation behaviors have been studied in the single phase Nd2Fe14B magnet and the nanocomposite Nd2Fe14B/alpha -Fe magnet, prepared by melt spinning. The results showed that the number of vacancy-cluster at grain boundaries increases with increasing annealing temperature for the both types of magnets. The increase of this kind of defect can improve the coercivity of the single-phase magnet. Conversely, the increase of vacancy-cluster amount leads to decreasing of the coercivity for the nanocomposite magnet. It implies that the mechanism of dominant magnetic hardening for the two types of magnets is different, and the domain walls pinning mechanism in the single-phase magnet and the reversal magnetization nucleation mechanism in the nanocomposite magnet operate, respectively. |
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