| 混合合金法添加DyH_x对烧结Nd-Fe-B磁体性能和微观结构的影响 |
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| 引用本文： | 刘国军,李家节,赵睿,张文臣,李卫.混合合金法添加DyH_x对烧结Nd-Fe-B磁体性能和微观结构的影响[J].功能材料,2010,41(1). |
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| 作者姓名： | 刘国军 李家节 赵睿 张文臣 李卫 |
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| 作者单位： | 钢铁研究总院,功能材料研究所,北京,100081 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目(2007AA03Z116,2007AA03Z438);;国家自然科学基金资助项目(50871032,50571035) |
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| 摘 要： | 以Nd31.5FebalB6.0Co1.2Cu0.04(质量分数,%)为母合金,添加不同含量DyHx粉研究Dy对Nd-Fe-B磁体性能和微观结构的影响。研究发现,Dy未扩散到主相晶粒中,主要分布在晶界相中;Dy使磁体晶粒得到细化、均匀化,异常长大晶粒基本消失,晶粒边界结构得到改善;添加0.5%(质量分数)的DyHx粉可以明显提高磁体矫顽力Hcj,但添加量超过1.0%(质量分数),磁体矫顽力Hcj增幅变小,磁体密度严重下降。
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| 关 键 词： | 晶粒尺寸 矫顽力 晶界相 形核场 |
Effect of blending DyH_x addition on the properties and microstructures of sintered Nd-Fe-B magnet |
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| LIU Guo-jun,LI Jia-jie,ZHAO Rui,ZHANG Wen-chen,LI Wei.Effect of blending DyH_x addition on the properties and microstructures of sintered Nd-Fe-B magnet[J].Journal of Functional Materials,2010,41(1). |
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| Authors: | LIU Guo-jun LI Jia-jie ZHAO Rui ZHANG Wen-chen LI Wei |
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| Affiliation: | Division of Functional Materials;Central Iron & Steel Research Institute;Beijing 100081;China |
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| Abstract: | The effect of Dy on the properties and microstructures of sintered Nd-Fe-B with addition of various amounts of DyHx powder to Nd31.5FebalB6.0Co1.2Cu0.04(wt%),as a precursor alloy,has been investigated. It is found that Dy is only located in the intergranular phases,and there is no diffusion of Dy into the matrix phases;It makes the grain more refined and uniform,and can effectively restrain the abnormal grain growth. Meanwhile,the microstructure of grain boundary has been improved;In addition,intrinsic coer... |
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| Keywords: | grain size coercivity intergranular phase nucleation field |
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