| 烧结NdFeB磁体相的继承性研究 |
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| 引用本文： | 唐杰,张林,魏成富,杨梨容,赵导文.烧结NdFeB磁体相的继承性研究[J].稀有金属材料与工程,2011(Z2):107-110. |
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| 作者姓名： | 唐杰 张林 魏成富 杨梨容 赵导文 |
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| 作者单位： | 中国工程物理研究院激光聚变研究中心;绵阳师范学院;绵阳西磁磁电有限公司 |
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| 基金项目： | 四川省教育厅重点项目(07ZA044;10ZA060);四川省教育厅人文社科青年基金项目(08zb047);绵阳市科技局重点项目(07Y010;10Y002-4) |
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| 摘 要： | 设计成分为Nd32.5B1.04Febal(质量分数,%),经过熔炼,制粉,成型,烧结后制备了烧结NdFeB磁体,对样品的铸锭,烧结态样品以及高温回火态样品,低温回火态样品的微观组织采用SEM进行了仔细地分析。结果显示,烧结NdFeB磁体的相具有"继承性",在熔炼中产生的α-Fe相会被烧结回火后的磁体继承下去,而烧结中形成的Nd2Fe14B相和B-rich相在回火后数量和形态基本上变化不大,Nd-rich相虽然数量变化也不大,但是在高温回火中熔化流动,均匀分布在主相Nd2Fe14B周围,把主相Nd2Fe14B一个个分隔开来,在低温回火中,这种流动会延续,相的形态会得到巩固,使得磁体最终获得良好的综合磁性能。
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| 关 键 词： | 烧结NdFeB磁体 微观组织 继承性 |
Research on the Microstructure Succession of Sintered NdFeB Magnet |
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| Tang Jie,Zhang Lin,Wei Chengfu,Yang Lirong,Zhao Daowen.Research on the Microstructure Succession of Sintered NdFeB Magnet[J].Rare Metal Materials and Engineering,2011(Z2):107-110. |
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| Authors: | Tang Jie Zhang Lin Wei Chengfu Yang Lirong Zhao Daowen |
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| Affiliation: | 1. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China) (2. Mianyang Normal University, Mianyang 621000, China) (3. Xici Magnetoelectricity Ltd, Mianyang 621000, China) |
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| Abstract: | According to nominal composition of Nd32.5B1.04Fe bal (wt%), sintered NdFeB magnets were prepared by melting, milling, moulding and sintering. The microstructure of samples, such as ingots, magnets in sintered state, magnets in high-temperature tempered state, and magnets in low-temperature tempered state, were analyzed by SEM. It is shown that all the kinds of microstructures of sintered NdFeB magnets have "succession". The α-Fe phase in melting processing is succeeded by sintering processing. Nd2Fe14B phases and B-rich phases in sintering processing are succeeded by tempering processing without shape and amount varity. The amount of Nd-rich phases hardly change, too, but they are melted and flowed at high-temperature. They encircle and detach the Nd2Fe14B phases. They keep on flowing in low-temperature tempering processing and these phases state are strengthened. Thus, magnets will have well general property. |
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| Keywords: | sintered NdFeB magnet microstructure succession |
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