聂子豪,李伟,李厚熹,王芳芸,郭开祥,侯育花,黄有林

• 1:南昌航空大学材料科学与工程学院

摘要(Abstract)：

基于表面活性剂辅助球磨技术成功制备出了纳米晶MnAl基永磁合金。结果表明,随球磨时间的增加,合金的矫顽力呈先增加后减小的趋势,最大矫顽力可达366 kA/m。微观结构分析表明,球磨时间的增加有益于颗粒的细化,微观结构呈现纳米晶τ-MnAl相被非晶相所包围的特征,这能够增加硬磁相之间的磁隔离作用,增加反转畴形核场,促进矫顽力的提高。后续热处理工艺研究表明,400～600℃温度范围内退火均能有效地使非晶相晶化,大幅增加τ-MnAl相含量,400℃退火5 h条件下所制样品的剩磁最高。

关键词(KeyWords)： MnAl永磁合金;热处理;球磨;磁性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51961027);; 江西省重点研发计划(20181ACE50005,20192ACB50020)

作者(Author): 聂子豪,李伟,李厚熹,王芳芸,郭开祥,侯育花,黄有林

DOI: 10.13289/j.issn.1009-6264.2020-0472

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