Nd_(12.3)Fe_(80.7)NbB_6纳米晶永磁合金的磁性能与微观结构  

Microstructure and magnetic properties of an Nd_(12.3)Fe_(80.7)NbB_6 nanocrystal permanent magnet

作　　者：隋延力[1] 陈治安[2] 包小倩[1] 张茂才[1] 周寿增[1] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083 [2]北京科技大学粉末冶金研究所,北京100083

出　　处：《北京科技大学学报》2007年第7期708-711,共4页Journal of University of Science and Technology Beijing

摘　　要：研究了添加Nb元素对Nd2Fe14B单相纳米晶永磁合金微观结构与磁性能的影响.结果表明:添加Nb可以在甩带过程中促进非晶的形成并稳定非晶相;在退火过程中,加入Nb后形成的析出相可以抑制晶粒长大,使晶粒细化且分布均匀,进而大幅度提高了材料的综合磁性能.名义成分为Nd12.3Fe80.7NbB6.0的非晶薄带在550℃退火处理10min后,可得到最佳磁性能:剩磁0.90T,矫顽力912.64kA.m-1,最大磁能积126.24kJ.m-3;随着退火温度的进一步提高,综合性能有所下降.The microalloying effect of niobium on the microstructure and magnetic properties of an Nd2Fe14B nanocrystal permanent magnet was investigated. The results show that niobium addition promotes the formation of amorphous phase and stabilizes the amorphous phase. During the annealing, precipitate phase after niobium adding restrains the growth of grains, uniforms the size of grains, and enhances the magnetic properties of the alloy. The optimum magnetic properties of Jr = 0. 899 8 T, Hci = 912.64 kA· m^-1 and （BH） m = 126.24 kJ·m^-3 were obtained by annealing a melt-spun Nd12.3Fe80.7NbB6.0 amorphous ribbon at 550℃ for 10 min. But the magnetic properties decreased when the annealing temperature further increased.

关 键 词：ND2FE14B 磁性能 纳米晶 非晶相 

分 类 号：TG132.2[一般工业技术—材料科学与工程]