Nb对Nd_2Fe_(14)B/α-Fe纳米复合永磁材料结构和磁性能的影响  

Effects of Nb on Magnetic Properties and Microstructure of Nd_2Fe_(14)B/α-Fe Nanocomposite Magnets

作　　者：王占勇[1] 刘文庆[2] 周邦新[3] 倪建森[3] 徐晖[3] 

机构地区：[1]上海应用技术学院,上海200235 [2]上海大学分析测试中心,上海200046 [3]上海大学材料所,上海200072

出　　处：《稀有金属材料与工程》2007年第5期830-834,共5页Rare Metal Materials and Engineering

基　　金：国家"863"高技术研究发展计划(2002AA302602-2);上海市科学技术发展基金纳米专项(0552nm049);上海市重点学科建设资助项目(P1502);上海应用技术学院人才引进启动基金(YJ2006-16)

摘　　要：添加Nb可提高(Nd0.9Dy0.1)9.5Fe79Co5B6.5(原子百分数,下同)合金的非晶形成能力和快淬薄带的晶化温度,经过710℃晶化处理4min后,快淬薄带的晶粒细小均匀,从而显著提高了快淬薄带的磁性能。三维原子探针(Three-DimensionalAtomProbe,简称3DAP)分析结果表明,含Nb快淬薄带晶化后,在晶界形成了Nb-Fe-B偏聚物,抑制了晶粒长大,细化了晶粒,进而使晶粒间交换耦合作用增强,提高了合金的磁性能。The amorphous formation ability and thermal stability of as-spun ribbons can be increased by the addition of Nb. Fine and uniform microstructures were achieved after the ribbons were annealed at 710℃ for 4 minutes, which enhances the exchange coupling between grains and improves the magnetic properties. The 3DAP results revealed that the Nb-Fe-B precipitates existed at the boundary of grains, suppressing the grain growth during crystallization process due to the refmement of grains.

关 键 词：ND2FE14B/Α-FE 纳米复合永磁材料 3DAP 磁性能 稀土 

分 类 号：TM273[一般工业技术—材料科学与工程]