| 各向异性Nd2Fe14B／α-Fe纳米晶复合磁体的制备和性能 |
| |
| 引用本文： | 牛培利,张久兴,岳明,李永利.各向异性Nd2Fe14B／α-Fe纳米晶复合磁体的制备和性能[J].材料研究学报,2008,22(6):619-622. |
| |
| 作者姓名： | 牛培利 张久兴 岳明 李永利 |
| |
| 作者单位： | 北京工业大学新型功能材料教育部重点实验室,北京,100022 |
| |
| 基金项目： | 国家自然科学基金50201001和北京市自然科学基金2041001资助项目
|
| |
| 摘 要： | 采用声化学法、放电等离子烧结技术(SPS)和热变形工艺制备致密各向同性和各向异性Nd_2Fe_(14)B/αFe复合磁体,研究了软磁相包覆对磁体的结构和性能的影响.结果表明,软磁相α-Fe对各向同性Nd_2Fe_(14)B/α-Fe复合磁体的影响主要表现为增强两相间的交换耦合作用,从而提高剩磁.当α-Fe体积分数的数值适当(不超过2%)时,各向异性Nd_2Fe_(14)B/α-Fe磁体形成较好的c轴晶体织构,具有较高的磁性能.α-Fe体积分数为1%的磁体性能最高:B_r=1.367 T,H_(ci)=712 kA/m,(BH)_m=327 kJ/m~3.
|
| 关 键 词： | 金属材料 Nd2Fe14B/α-Fe纳米晶复合磁体 声化学和放电等离子烧结 各向异性 |
| 收稿时间： | 2007-09-25 |
| 修稿时间： | 2008-04-28 |
Preparation and properties of anisotropic Nd2Fe14B/α--Fe nanocomposite magnets |
| |
| NIU Peili,ZHANG Jiuxing,YUE Ming,LI Yongli.Preparation and properties of anisotropic Nd2Fe14B/α--Fe nanocomposite magnets[J].Chinese Journal of Materials Research,2008,22(6):619-622. |
| |
| Authors: | NIU Peili ZHANG Jiuxing YUE Ming LI Yongli |
| |
| Affiliation: | The Key Laboratory of Advanced Functional Materials, Ministry of Education,
Beijing University of Technology, Beijing 100022 |
| |
| Abstract: | Full dense isotropic and anisotropic Nd2Fe14B/α--Fe nanocomposite magnets were prepared via sonochemistry method, spark plasma sintering (SPS) and hot deformation method. The effects of α–Fe volume fraction on the structure and magnetic properties of the magnets were investigated. For the isotropic magnets, the exchanging coupling and remanence increase as the α–Fe content increases. For the anisotropic magnets, only the magnets with no more than 2% α–Fe exhibit strong c-axis crystal texture of Nd2Fe14B phase, and the better magnetic properties are Br=1.367 T, Hci=712 kA/m, (BH)m=327 kJ/m3. |
| |
| Keywords: | metallic materials 2Fe14B/&alpha " target="_blank">--Fezz')" href="#"> nanocomposite magnets Nd2Fe14B/&alpha --Fe sonochemistry and spark plasma sintering anisotropy |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《材料研究学报》浏览原始摘要信息 |
|
点击此处可从《材料研究学报》下载全文 |
