原位生成纳米NbC对热变形NdFeB磁性能及耐腐蚀性能的影响  

Effect of In-Situ Nano-NbC Intergranular Additionon Magnetic Properties and Corrosion Resistanceof Hot-Deformed NdFeB Magnet

作　　者：王升川 李晓强 宋博 王学庚 王志伟 倪俊杰[1] WANG Shengchuan;LI Xiaoqiang;SONG Bo;WANG Xuegeng;WANG Zhiwei;NI Junjie(School of Materials Science and Engineering,Liaocheng University,Liaocheng 252059,China;School of Metallurgy,Dongbei University,Shenyang 110819,China)

机构地区：[1]聊城大学材料科学与工程学院,山东聊城252059 [2]东北大学,冶金学院,辽宁沈阳110819

出　　处：《聊城大学学报(自然科学版)》2025年第2期251-258,306,共9页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金项目(52174346);山东省大学生创新创业训练计划项目(S202210447050);山东省自然科学基金项目(ZR2021ME031);聊城大学大学生创新创业训练计划项目(CXCY2022024)资助。

摘　　要：在热变形NdFeB磁体中原位生成纳米NbC,研究了纳米NbC含量对磁性能及耐腐蚀性能的影响。结果表明,原位生成纳米NbC能够有效改善了NdFeB的磁性能。当添加质量分数为0.10%时,磁体剩磁、磁能积和综合磁性能最高,原因在于纳米NbC使磁体晶界处带状富Nd相均匀分布,改善了磁晶取向。此外,NbC的生成提高了磁体的耐腐蚀性能,当NbC质量分数为0.10%时,电荷转移电阻最高,腐蚀电流密度最低,磁体耐腐蚀性能最佳,这与纳米NbC阻碍电荷转移和阻隔NdFe氧化有关。该发现为高品质稀土永磁材料的开发提供有益参考。Through the in-situ formation of nano-NbC in hot deformed NdFeB magnets,the effect of nano-NbC content on magnetic properties and corrosion resistance was investigated.The results show that in-situ nano-NbC can effectively improve the magnetic properties of NdFeB.When the mass fraction is 0.10%,the residual magnetism,magnetic energy product,and comprehensive magnetic properties are the highest,which is attributed to the improved distribution of strip-shaped Nd-rich phases at the grain boundaries and the enhanced magnetic crystal orientation.In addition,NbC is also beneficial for the enhanced corrosion resistance of magnets.When its mass fraction is 0.10%,the charge transfer resistance is highest,the corrosion current density is lowest,and the corrosion resistance of magnets is best.This is related to the obstruction of charge transfer and the hinderance of Nd/Fe oxidation by nano-NbC.Such discoveries provide useful reference for the development of high-quality rare earth permanent magnet materials.

关 键 词：NDFEB磁体 NBC 磁性 耐蚀性能 

分 类 号：O469[理学—凝聚态物理]