纳米晶复合Nd_2Fe_(14)B/α-Fe永磁合金磁性能研究  

Study on Magnetic Properties of Nd_2Fe_(14)B/α-Fe Nanocomposite Magnets

作　　者：何永周[1] 徐晖[1] 戚楠楠[1] 倪建森[1] 侯雪玲[1] 

机构地区：[1]上海大学材料研究所,上海200072

出　　处：《稀土》2004年第6期15-17,共3页Chinese Rare Earths

基　　金：国家"863"项目资助(2002AA302602-2)

摘　　要：采用快淬和晶化退火法制备了成分为Nd8.5Fe74.5Co5Cu1Nb1Zr3Cr0.5B6.5的纳米晶复合永磁合金。研究了制备过程中快淬速度和退火温度对合金磁性能和组织结构的影响。结果表明,快淬速度为16.7m/s,合金样品经690℃/4min的晶化处理后,制成的粘结磁体可得到较优异的综合磁性能:Br=0.65T,JHc=708.4kA/m,(BH)max=72.0kJ/m3。Nd_(8.5)Fe_(74.5)Co_5Cu_1Nb_1Zr_3Cr_(0.5)B_(6.5) alloy was prepared by melt-spun and subsequent annealing,influence of annealing temperature and melt-spun speed on microstructure and magnetic proerties of bonded magnets has been investigated.The optimum magnetic properties can be obtained after annealing the ribbons(16.7m/s) at 690℃ for 4min,the remanence (B_r),intrinsic(_JH_c) and maximum energy product((BH)_(max))are 0.65T,708.4kA/m,72.0kJ/m^3,respectively.

关 键 词：纳米晶复合 快淬速度 退火温度 磁性能 

分 类 号：TG132.2[一般工业技术—材料科学与工程] TM273[金属学及工艺—合金]