摘要
为改善纳米晶交换耦合Nd2Fe14B/α-Fe永磁合金微结构以提高磁性能,用熔体快淬和动态晶化热处理的方法制备了纳米晶交换耦合Nd2Fe14B/α-Fe永磁体,采用XRD和TEM等方法系统研究了动态晶化热处理对Nd10.5(FeCoZr)83.4B6.1永磁体磁性能和显微组织的影响。结果表明:与传统晶化相比,动态晶化可以在相同的晶化温度下缩短晶化时间,同时能细化晶粒,增强晶粒间磁交换耦合作用,提高磁性能。Nd10.5(FeCoZr)83.4B6.1合金快淬薄带经700℃,10min动态晶化热处理后,制得的粘结磁体获得最佳磁性能,剩磁Br=0.685T,内禀矫顽力Hcj=732kA/m,磁感矫顽力Hcb=429kA/m,最大磁能积(BH)m=75kJ/m3。
In order to improve the magnetic properties by microstructure optimization for Nd2Fe14B/α-Fe nanocrystalline permanent magnets, the effects of dynamic crystallization on the microstructure and magnetic properties have been investigated by use of X-ray diffraction （XRD） and transmission electron microscopy （TEM） for the Nd10.5（FeCoZr）83.4B6.1 permanent magnets prepared by rapid quenching and post heat treatment. It has been determined that, compared with the conventional heat treatment, the dynamic crystallization can shorten the crystallization time refine the grain size, and enhance the exchange couple interaction between grains, favorable to the magnetic properties. As a result, the optimal magnetic properties （Br=0.685 T, Hcj=732 kA/m, Hcb=429 kA/m, （BH）m=75 kJ/m^3） are obtained after dynamic crystallization heat treatment at 700℃ for 10min for Nd10.5（FeCoZr）83.4B6.1.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第2期325-328,共4页
Rare Metal Materials and Engineering
基金
教育部新世纪优秀人才计划资助项目(NCET-04-0873)
四川省重大科技攻关项目(03GG009-006)
四川省杰出青年科技基金(03ZQ026-006)
