Nd_(8.5)Fe_(77.6)B_(6.4)Co_4Zr_3Cu_(0.5)纳米复合永磁材料研究  

Study on Nd_(8.5)Fe_(77.6)B_(6.4)Co_4Zr_3Cu_(0.5) Nanocomposite Permanent Magnets

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

机构地区：[1]上海应用技术学院,上海200235 [2]上海大学,上海200072 [3]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《稀有金属材料与工程》2009年第10期1787-1790,共4页Rare Metal Materials and Engineering

基　　金：上海市教委基金(06OZ015);上海高校优秀青年教师科研专项基金(yyy-07001);新金属材料国家重点实验室开放基金资助项目

摘　　要：研究了Nd8.5Fe77.6B6.4Co4Zr3Cu0.5合金晶化处理后的微观结构。研究发现,该合金15m/s淬态薄带只存在一个较宽的晶化峰,其晶化后的晶粒尺寸均匀性较差,晶化相中存在少量Fe77.2Nd22.8相,削弱了晶粒间的交换耦合作用。三维原子探针分析表明,Cu几乎不固溶于α-Fe,和Zr元素共同富集于Fe77.2Nd22.8相区。这些相的存在,使得合金的剩余磁化强度和磁滞回线的方形度降低,进而降低了合金的综合磁性能。Microstructure of as-spun Nd8.5Fe77.6B6.4Co4Zr3Cu0.5 ribbons after annealing treatment was investigated. Results show that the as-spun ribbons with the wheel speed of 15 m/s only have one exothermic peak, which is so wide that the grain size distribution is inhomogeneous for the annealed ribbons. A few Fe77.2Nd22.8 phases were found in the annealed ribbons, reducing the interaction coupling between the soft-magnetic and hard-magnetic phases. The analysis of three dimensional atom probe（3DAP） revealed that Cu atoms were almost insoluble in αFe phase, enriching in Fe77.2Nd22.8 phase together with Zr atoms. These phases reduced the remanence and squareness of the hysteresis loop, resulting in the decrease of the integrated magnetic properties.

关 键 词：ND2FE14B/Α-FE 纳米复合永磁材料 磁性能 三维原子探针 Cu 

分 类 号：TM273[一般工业技术—材料科学与工程]