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| 烧结Nd-Fe-B磁体的温度稳定性缺陷分析 | |
| 引用本文： | 王帅,刘湘涟,秦林.烧结Nd-Fe-B磁体的温度稳定性缺陷分析[J].稀有金属与硬质合金,2012,40(1):26-29. |
| 作者姓名： | 王帅 刘湘涟 秦林 |
| 作者单位： | 1. 太原理工大学表面工程研究所,山西太原030024;宁波工程学院材料工程研究所,浙江宁波315016 2. 宁波工程学院材料工程研究所,浙江宁波,315016 3. 太原理工大学表面工程研究所,山西太原,030024 |
| 摘 要： | 采用SEM、EDAX及粒度分析手段,研究了烧结Nd-Fe-B磁体开路磁通不可逆损失(hirr)异常偏高的原因。结果表明,磁体显微组织中晶粒尺寸分布不均匀及存在少量粗大晶粒,是导致其温度稳定性缺陷的主要因素,表现为少数产品hirr异常偏高。在磁体工业生产过程中,改进原料的铸锭和制粉技术,避免出现粗大粉末颗粒,减少极细粉末颗粒的数量,保证磁体显微组织精细均匀,是制备温度稳定性高的烧结Nd-Fe-B磁体的基本措施。 |
| 关 键 词： | 烧结Nd-Fe-B磁体 温度稳定性 开路磁通不可逆损失 显微组织 粉末粒度 |
Analysis of the Temperature Stability Defect of Sintered Nd-Fe-B Magnet |
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| WANG Shuai , LIU Xiang-lian , QIN Lin.Analysis of the Temperature Stability Defect of Sintered Nd-Fe-B Magnet[J].Rare Metals and Cemented Carbides,2012,40(1):26-29. | |
| Authors: | WANG Shuai LIU Xiang-lian QIN Lin |
| Affiliation: | 1(1.Research Institute of Surface Engineering,Taiyuan University of Technology,Taiyuan 030024,China; 2.Research Institute of Materials Engineering,Ningbo University of Technology,Ningbo 315016,China) |
| Abstract: | The cause of abnormally high open-circuit flux irreversible loss(hirr) in the sintered Nd-Fe-B magnet was investigated by the means of SEM,EDAX and powder particle size analysis.The results show that non-uniform crystal grain size distribution and coarse grains in the magnet microstructure are the main factors leading to the temperature stability defects of the magnet,i.e.a small amount of the finished magnet showing abnormally high hirr.The basic measure for preparing the sintered Nd-Fe-B magnet with excellent temperature stability is to improve the techniques of ingot casting and powder preparation,avoiding coarse powder particles,reducing very fine powder particles and ensuring uniform fine magnet microstructure. |
| Keywords: | sintered Nd-Fe-B magnet temperature stability open-circuit flux irreversible loss microstructure particle size |
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