氢爆工艺对NdFeAlB磁体的微结构和永磁性能的影响  

Effect of HD Process on Microstructure and Hard Magnetic Properties of NdFeAlB Magnet

作　　者：姜忠良[1] 陈秀云[1] 陈晓东[1] 石大立[1] 杨昌平[1] 朱静[1] 

机构地区：[1]清华大学材料科学与工程研究院,北京100084

出　　处：《中国稀土学报》2001年第3期229-232,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金资助项目 !(5 0 0 770 10 )

摘　　要：研究了氢爆工艺 (HD)对烧结NdFeAlB的微观结构与永磁性能的影响。用HD工艺制备的NdFeAlB烧结磁体 (HD磁体 )的矫顽力比传统球磨 (BM)工艺的高 ,但剩磁及磁能积较低 ;微观分析发现HD磁体的晶粒边界上存在有未烧结完全的磁粉 ;X射线衍射测试表明HD磁体易磁化轴的取向度较低。Effect of HD process on microstructure and magnetic properties of sintered NdFeAlB (HD magnet) were investigated. The results show that the coercivity of HD magnet is higher than that of traditional ball milling (BM) magnet, while the remanence and the maximum product energy are lower. Microstructure analysis shows that there are some fine un sintered powders between the grains of HD magnet. X ray diffraction (XRD) analysis reveals that degree of easy axis alignment of HD magnet is lower. Some ideas to improve the current HD process were proposed.

关 键 词：稀土 氢爆 钕铁硼磁体 永磁性能 微结构 NdFeAlB磁体 粉碎 

分 类 号：TM273[一般工业技术—材料科学与工程]