| 气流磨工艺对烧结NdFeB磁体组织与性能的影响 |
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| 引用本文： | 彭光怀,;贾小武,;郭华斌,;杜西龙.气流磨工艺对烧结NdFeB磁体组织与性能的影响[J].赣南师范学院学报,2014(3):37-39. |
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| 作者姓名： | 彭光怀 ;贾小武 ;郭华斌 ;杜西龙 |
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| 作者单位： | [1]赣南师范学院化学化工学院,江西赣州341000; [2]赣南师范学院江西省镁合金材料工程技术研究中心,江西赣州341000 |
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| 基金项目： | 江西省教育厅科技项目（GJJ12567、GJJ13656） |
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| 摘 要： | 采用速凝法制备NdFeB薄带,再经氢破制粉、压型、烧结、热处理制备NdFeB永磁体,通过激光粒度分布仪、光学显微镜以及AMT-4磁学特性测量仪等手段表征磁体的组织和性能,考察气流磨工艺对磁体组织和性能的影响规律.研究结果表明:气流磨分选转速越快,磁粉粒度越细小,制备磁体的磁学性能先增加后减小,当气流磨分选转速为3 400 r/min时,制备磁体组织均匀,剩磁、矫顽力、最大磁能积分别达到14.19 kGs、907.44 kA/m和397.28 kJ/m3.
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| 关 键 词： | 速凝法 NdFeB磁体 气流磨工艺 磁性能 |
Effect of Air-stream Mill Technique on Microstructure and Properties of Sintered NdFeB Permanent Magnet Materials |
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| Institution: | PENG Guanghuai, JIA Xiaowu , GUO Huabin, DU Xilong ( a. School o f Chemistry and Chemical Engineering; b. Jiangxi Provincial Engineering Research Center for Magnesium Alloys, GanNan Normal University, Ganzhou 341000, China) |
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| Abstract: | The NdFeB ribbon was manufactured by rapid solidification method firstly,and then the NdFeB permanent magnets were fabricated by technique of compression,sintering and heat-treatment. And its microstructure and properties were characterized by laser mastersizer,optical microscopy and AMT-4 magnet property tester. The effect of air- stream mill techniques on the microstructure and properties of NdFeB permanent magnet materials was investigated. The results show that the average grading of magnet powder decreased with increasing rotating speed of air-milling,and the magnet properties of sintered magnet increased firstly and then decreased.The optical microstructure distributed homogeneously and its residual magnetism,coercivity and maximum magnetic energy product reached 14. 19kGs,907. 44kA /m and 397. 28kJ /m3when the rotational speed of air-stream was 3 400r /mins. |
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| Keywords: | strip casting method NdFeB permanent magnet materials air-stream mill techniques magnet properties |
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