双相纳米晶永磁体的研究  

A Study of Two-Phase Nanocrystalline Permanent Magnet

作　　者：倪建森[1] 徐晖[1] 朱明原[1] 李强[1] 周邦新[1] 董远达[1] 

机构地区：[1]上海大学材料研究所,上海200072

出　　处：《中国稀土学报》2002年第3期215-218,共4页Journal of the Chinese Society of Rare Earths

基　　金：上海自然科学基金资助 (99JC14 0 18)项目

摘　　要：Nd8 .5Fe75Co5Cu1 Nb1 Zr3B6 .5合金熔体经 18m·s- 1 快淬 ,在 670℃ / 4min退火处理后 ,制备成的粘结磁体的最佳磁性能为 :Br=0 .68T(6 8kGs) ,JHc=62 0 .3kA·m- 1 (7 8kOe) ,(BH) max=74kJ·m- 3(9 3 3MGOe)。在低Nd合金中复合添加Zr和Cu ,提高了内禀矫顽力 ,改善了磁滞回线的矩形度 ,从而提高了最大磁能积。Nd 8.5 Fe 75 Co 5Cu 1Nb 1Zr 3B 6.5 permanent magnet was prepared by melt spun(18 m·s -1 ) and subsequent heat treatment(670 ℃/4 min). Excellent magnetic properties of the magnet can be achieved, B r=0.68 T(6.8 kGs), J H c=620.3 kA·m -1 (7.8 kOe), ( BH ) max =74 kJ·m -3 (9.33 MGOe). The addition of Cu and Zr shows to be advantageous in improving an intrinsic coercivity and squareness of hysteresis loop, and it has good energy product.

关 键 词：稀土 交换耦合 双相纳米晶 永磁体 永磁合金 磁性能 

分 类 号：TM273[一般工业技术—材料科学与工程]