赣南师范学院学报
贛南師範學院學報
공남사범학원학보
JOURNAL OF GANNAN TEACHERS COLLEGE
2014年
3期
37-39
,共3页
彭光怀%贾小武%郭华斌%杜西龙
彭光懷%賈小武%郭華斌%杜西龍
팽광부%가소무%곽화빈%두서룡
速凝法%NdFeB磁体%气流磨工艺%磁性能
速凝法%NdFeB磁體%氣流磨工藝%磁性能
속응법%NdFeB자체%기류마공예%자성능
strip casting method%NdFeB permanent magnet materials%air-stream mill techniques%magnet properties
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3400 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.
採用速凝法製備NdFeB薄帶,再經氫破製粉、壓型、燒結、熱處理製備NdFeB永磁體,通過激光粒度分佈儀、光學顯微鏡以及AMT-4磁學特性測量儀等手段錶徵磁體的組織和性能,攷察氣流磨工藝對磁體組織和性能的影響規律.研究結果錶明:氣流磨分選轉速越快,磁粉粒度越細小,製備磁體的磁學性能先增加後減小,噹氣流磨分選轉速為3400 r/min時,製備磁體組織均勻,剩磁、矯頑力、最大磁能積分彆達到14.19 kGs、907.44 kA/m和397.28 kJ/m3.
채용속응법제비NdFeB박대,재경경파제분、압형、소결、열처리제비NdFeB영자체,통과격광립도분포의、광학현미경이급AMT-4자학특성측량의등수단표정자체적조직화성능,고찰기류마공예대자체조직화성능적영향규률.연구결과표명:기류마분선전속월쾌,자분립도월세소,제비자체적자학성능선증가후감소,당기류마분선전속위3400 r/min시,제비자체조직균균,잉자、교완력、최대자능적분별체도14.19 kGs、907.44 kA/m화397.28 kJ/m3.
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 de-creased 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/m3 when the rotational speed of air-stream was 3 400r/mins.