Fe含量对NdFe10.25TiNb0.25N/α-Fe永磁合金微观组织与磁性能的影响
Effect of Fe Content on Microstructure and Magnetic Properties of NdFe10.25TiNb0.25N/α-Fe Permanent Magnet Alloy
朱子建 1张颖隆 1弭弘尧 1冯运莉1
作者信息
- 1. 华北理工大学冶金与能源学院,河北唐山 063210
- 折叠
摘要
研究了 Fe含量对NdFe10.25TiNb0.25/x％α-Fe(质量分数)永磁合金微观组织和磁性能的影响.结果表明,合金铸锭均是由α-Fe相、1∶12相和富Nd相组成,Fe含量增加,α-Fe相含量增加,1∶12相含量减少.合金薄带晶粒尺寸随着Fe含量的增加而逐渐减小,并产生Fe2Ti相,Fe2Ti相和富Nd相含量随着Fe含量的增加而逐渐减少.当x≥15时,合金薄带只有1∶12相和α-Fe相,平均晶粒尺寸减小到60 nm以下.渗氮后平均晶粒尺寸减小15％～20％,磁性能得到明显改善.x=15时,得到的氮化合金薄带磁性能较佳,矫顽力为80396 A/m,饱和磁化强度为130.7(A·m2)·kg-1,比x=0时矫顽力提高了 25％,饱和磁化强度提高了 12％.粘结后最大磁能积先下降后升高,x=15时最高,达到了 32.08 kJ/m3,相比于x=0时的22.92 kJ/m3,增幅达到了 40％.x=15时的氮化合金薄带高温结构稳定性较好,在360 ℃以下保持结构稳定,高温应用潜力大.
Abstract
The effect of Fe content on microstructure and magnetic properties of NdFe10.25TiNb0.25/x％α-Fe permanent magnet alloy was studied.The results show that alloy ingot is composed of α-Fe phase,1∶12 phase and Nd-rich phase.When Fe content increases,α-Fe phase content increases,but 1∶12 phase content decreases.The grain size of the thin strip decreases gradually with the increase in Fe content,and Fe2Ti phase is produced.The contents of Fe2Ti phase and Nd-rich phase decrease gradually with the increase in Fe content.When x≥ 15,the thin strip only has 1∶12 phase and α-Fe phase,and the average grain size is reduced to less than 60 nm.After nitriding,the average grain size is reduced by 15％-20％,and the magnetic properties are obviously improved.When x=15,the obtained nitrided alloy thin strip has better magnetic properties,coercivity is 80396 A/m,saturation magnetization is 130.7(A·m2).kg-1,which is 25％higher than that when x=0,and saturation magnetization is increased by 12％.After bonding,the maximum magnetic energy product decreases first and then increases,and reaches the highest value(32.08 kJ/m3)at x=15,which is increased by 40％compared with 22.92 kJ/m3 at x=0.The nitriding alloy thin strip at x=15 has good structural stability at high temperature,and maintains structural stability below 360 ℃,which has great application potential at high temperature.
关键词
NdFe10.25TiNb0.25/α-Fe合金/Fe含量/熔体快淬/微观组织/磁性能Key words
NdFe10.25TiNb0.25/α-Fe alloy/Fe content/melt fast quenching/microstructure/magnetic property引用本文复制引用
基金项目
国家自然科学基金(51974134)
河北省科技重大专项(21281008Z)
出版年
2024
NETL
NSTL
万方数据