烧结工艺对2:17型SmCo合金磁性能的影响探究
Research on the effect of sintering process on the magnetic properties of 2:17-type SmCo alloy
张晨 1李岩 1吕科 2任少卿 3张中烨 4赵明静2
作者信息
- 1. 内蒙古科技大学材料科学与工程学院,内蒙古包头 014010
- 2. 包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头 014030
- 3. 包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头 014030;浙江大学材料科学与工程学院,浙江杭州 310030
- 4. 山东建筑大学理学院,山东济南 250101
- 折叠
摘要
采用传统粉末冶金工艺制备了2:17 型SmCo合金,研究了烧结温度1195～1210℃对磁体微观结构和磁性能的影响.烧结态磁体主要由 2:17H相和 1:5H相组成.随烧结温度的升高,相组成不变,而晶粒平均粒径由43.51 μm生长至75.71 μm.从1195℃提升至1210℃的过程中,剩磁Br、内禀矫顽力Hcj、最大磁能积(BH)max和密度ρ均随温度的升高先增大后减小,并在1200℃时得到了Br=11.12 kGs、ρ=8.2747 g/cm3 的最佳烧结态磁体,同时磁体内铜元素分布相对均匀,磁体获得高磁性能.对比终态磁性能,发现剩磁Br和密度ρ的提升主要完成于烧结阶段.
Abstract
In this research,with the 2:17-type SmCo alloy prepared through traditional powder metallurgy process,the effect of the in-crease of sintering temperature from 1195℃ to 1210℃ on the microstructure and the magnetic properties of the obtained alloy was studied.The sintered magnet was mainly composed of 2:17H phase and 1:5H phase.Despite the increase of the sintering temperature,the phase composition remained unchanged,while the average grain size increased from 43.51 μm to 75.71 μm.The remanence Br,the intrinsic coercivity Hcj,the maximum magnetic energy product(BH)max and the density ρ increased and then decreased with the in-crease of temperatures from 1195℃ to 1210℃.The best sintered magnet with Br=11.12 kGs and ρ=8.2747 g/cm3 was obtained at 1200℃.At the same time,the distribution of copper elements in the magnet was relatively uniform,and the magnet obtained high magnetic properties.Comparison of the final magnetic properties revealed that the increase of remanence Br and density ρ was mainly completed in the sintering stage.
关键词
2:17型SmCo永磁材料/烧结温度/磁性能/微观组织结构Key words
2:17-type SmCo permanent magnetic material/sintering temperature/magnetic properties/microstructure引用本文复制引用
基金项目
科技兴蒙上海交通大学专项(2023XYJG0001-01-03)
北方稀土企业项目(2022H2424)
北方稀土企业项目(2022Z2446)
北方稀土企业项目(2022H2390)
出版年
2024
NETL
NSTL
万方数据