Dy对NdFeB永磁合金各向异性的影响  

Effect of Dy addition on the magnetic anisotropy of NdFeB alloys

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》2009年第1期74-77,共4页Journal of University of Science and Technology Beijing

摘　　要：对名义成分为Nd12.3-xDyxFe79.7Nb0.8Zr0.8Cu0.4B6(x=0,0.5,1.5,2.5)的预合金进行长时间高温退火,将其破碎,取向并粘结.分别沿取向方向和垂直于取向方向测量其磁化曲线.将两曲线延长至相交,交点对应的磁场视为材料的磁晶各向异性场.结果表明:随着Dy含量的增加,合金各向异性场(HA)呈线性增加.当Dy的原子分数为2.5%时,合金各向异性场达到7536 kA·m-1;平均每增加1%Dy,各向异性场提高值为200～300 kA·m-1.Nd12.3-xDyxFe79.7Nb0.8Zr0.8Cu0.4B6（x=0,0.5,1.5,2.5） prealloys were annealed for about 10h at high temperature （1 050 ℃）. Then, the NdFeB single-phase alloys were smashed into fine grains and oriented in bonding materials to make them solidified. Magnetization curves in the direction of parallel（//c） and perpendicular（ ⊥ c ） to the magnetic field were measured, and the intersection point of the two curves was considered as magnetic anisotropy. With increasing Dy content, the magnetic anisotropy of the aligned alloys increased distinctly. The maximum magnetic anisotropy was about 7 536 kA·m^- 1 obtained at a Dy atomic fraction of 2.5 % ; with every 1% increase of Dy addition, the anisotropy was elevated about 200-- 300 kA·m^- 1.

关 键 词：NDFEB合金 镝 各向异性场 矫顽力 

分 类 号：TG132.2[一般工业技术—材料科学与工程]