采用流动温压成型工艺制备黏结钕铁硼/锶铁氧体复合磁体,研究温压工艺参数对钕铁硼/锶铁氧体复合磁体磁性能的影响.结果表明:随着温压温度、压制时间以及保压压力的提高,黏结复合磁体的磁性能呈现先增大后减小的趋势.流动温压成型参数的选择与黏结剂有关,采用酚醛环氧树脂BPANE8200为黏结剂时,流动温压成型的最佳工艺参数:77℃加载900MPa并保压8min,复合磁体的剩磁Br、内禀矫顽力Hcj以及最大磁能积(BH)max均获得最大值,即Br=522mT,Hcj=740.48kA/m,(BH)max=39.82kJ/m3.
Bonded NdFeB/Sr-ferrite hybrid magnets were synthesized by using warm flow compaction (WFC)technique,and the influences of WFC parameters on the magnetic properties were investiga-ted.The results show that the magnetic properties firstly increase and then decrease with the increase of temperature,pressure and time.The selection of parameters for WFC process is associated with the selected binder.When the epoxy phenolic resin BPANE8200 is used as binder,the optimum process parameters of WFC are 77℃,with loading of 900MPa,and holding time for 8min.The values of rema-nence Br ,intrinsic coercive force Hcj and maximum energy product (BH)max of the hybrid magnets are all obtained the maximum,that is,Br= 522mT,Hcj= 740.48kA/m,(BH)max= 39.82kJ/m3 .
参考文献
| [1] | Ormerod J.;Constantinides S..BONDED PERMANENT MAGNETS - CURRENT STATUS AND FUTURE OPPORTUNITIES[J].Journal of Applied Physics,19978 Pt.2b(8 Pt.2b):4816-4820. |
| [2] | Coey JMD.;Odonnell K..NEW BONDED MAGNET MATERIALS[J].Journal of Applied Physics,19978 Pt.2b(8 Pt.2b):4810-4815. |
| [3] | Sugimoto, S..Current status and recent topics of rare-earth permanent magnets[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,20116(6):064001-1-064001-11. |
| [4] | Oliver Gutfleisch;Matthew A. Willard;Ekkes Bruck;Christina H. Chen;S. C. Sankar;J. Ping Liu.Magnetic Materials and Devices for the 21st Century: Stronger, Lighter, and More Energy Efficient[J].Advanced Materials,20117(7):821-842. |
| [5] | 白书欣 .粘结NdFeB永磁材料制造原理与技术[D].国防科学技术大学,2006. |
| [6] | Warm flow compaction fosters more complex PM parts[J].Metal Powder Report,20012(2):26-28. |
| [7] | 张菊红;肖志瑜;李元元.粉末冶金流动温压成形技术[J].粉末冶金技术,2006(1):45-48. |
| [8] | 肖志瑜;柯美元;李元元;倪东惠.温压工艺最新进展--流动温压技术[J].粉末冶金工业,2002(5):28-32. |
| [9] | 李元元;肖志瑜;罗术华;王军.粉末冶金流动温压成形技术及其思考[J].粉末冶金材料科学与工程,2006(4):189-193. |
| [10] | 王军;肖志瑜;高红云;邵明.W-34Ni-5Fe合金的流动温压成形[J].粉末冶金材料科学与工程,2007(6):380-384. |
| [11] | 肖志瑜;张菊红;邵明;李元元.金属粉末流动温压成形的特点及其技术问题分析[J].中国机械工程,2005(3):257-259,281. |
| [12] | 郑军君;倪东惠;胡昌旭;肖志瑜;周水波;李元元.流动温压成形"十"字形零件及其烧结工艺的研究[J].粉末冶金工业,2010(1):32-36. |
| [13] | 刘云鹤;钟喜春;黄有林;刘仲武;曾德长;余红雅;邱万奇.流动温压成型时间和温度对粘结钕铁硼/铁氧体复合磁体性能的影响[J].磁性材料及器件,2011(6):42-46. |
| [14] | 钟喜春;黄有林;刘云鹤;刘仲武;曾德长.NdFeB磁粉对粘结NdFeB/锶铁氧体复合磁体性能的影响[J].电子元件与材料,2012(10):41-44. |
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