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| 放电等离子烧结纳米晶NdFeB合金的组织特征和磁性能 | |
| 引用本文： | 黄华勇,刘仲武,李小强,高学绪,余红雅,钟喜春,朱洁,曾德长.放电等离子烧结纳米晶NdFeB合金的组织特征和磁性能[J].磁性材料及器件,2011,42(2). |
| 作者姓名： | 黄华勇 刘仲武 李小强 高学绪 余红雅 钟喜春 朱洁 曾德长 |
| 作者单位： | 1. 华南理工大学材料科学与工程学院,广东省广州,510640 2. 华南理工大学机械与汽车工程学院,广东省广州,510640 3. 北京科技大学新金属材料国家重点实验室,北京,100083 |
| 基金项目： | 新金属材料国家重点实验室开放基金资助项目(2008F-01):广东省自然科学基金资助项目，广东省科技计划资助项目，华南理工大学中央高校基本科研业务费专项资金资助项目 |
| 摘 要： | 通过对快淬NdFeB粉末进行放电等离子烧结(SPS),制备出各向同性NdFeB永磁材料,研究了烧结工艺对磁体组织形貌和性能的影响.结果表明,SPS烧结产生的颗粒放电导致粉末边界区域晶粒长大,形成了边界粗晶区,而粉末内部仍保持了快淬粉末的细晶结构.烧结温度和压力对晶粒尺寸有较大的影响,从而影响烧结磁体的磁性能.较低的烧结温度和高的烧结压力既可以获得高致密磁体,也可以有效减小粗晶区的尺寸,从而提高材料综合磁性能. |
| 关 键 词： | 纳米晶NdFeB合金 放电等离子烧结 微结构 磁性能 |
Microstructure and magnetic properties of spark plasma sintered nanocrystalline NdFeB alloys |
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| HUANG Hua-yong,LIU Zhong-wu,LI Xiao-qiang,GAO Xue-xu,YU Hong-ya,ZHONG Xi-chun,ZHU Jie,ZENG De-chang.Microstructure and magnetic properties of spark plasma sintered nanocrystalline NdFeB alloys[J].Journal of Magnetic Materials and Devices,2011,42(2). | |
| Authors: | HUANG Hua-yong LIU Zhong-wu LI Xiao-qiang GAO Xue-xu YU Hong-ya ZHONG Xi-chun ZHU Jie ZENG De-chang |
| Affiliation: | HUANG Hua-yong1,LIU Zhong-wu1,LI Xiao-qiang2,GAO Xue-xu3,YU Hong-ya1,ZHONG Xi-chun1,ZHU Jie3,ZENG De-chang1 1.School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China,2.School of Mechanical and Automobile Engineering,3.State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083 |
| Abstract: | Isotropic NdFeB magnets were synthesized by spark plasma sintering(SPS) using melt spun powders as start materials.The effects of SPS process on the microstructure and magnetic properties were investigated.The grain growth was found at the initial particles surface due to the high temperature during SPS and the coarse grain zones formed at the vicinity of particle boundaries,but the fine grain structure still exists in the interior of the particles.The SPS temperature and pressure have important effect on t... |
| Keywords: | nanocrystalline NdFeB alloy spark plasma sintering microstructure magnetic properties |
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