摘要
采用双合金技术，在富Nd晶界相中，同时添加TM1（Nb、Ti）和TM2（Al、Ga），获得了矫顽力超高、热稳定性好、力学性能和耐腐蚀性强的烧结Nd—Fe—B永磁材料。在（NdDyTb）12.69（FeCoNb）84.01B6.00主合金中添加6％的（NdDyTb）25（FeCoNbTiGaAl）68B7辅合金，磁体的内禀矫顽力达到2880kA／m，260℃时磁通不可逆损失仅为5％，22～220℃剩磁和矫顽力的温度系数分别为-0．110％／℃-0．381％／℃，抗弯强度为328MPa，168h失重2．5mg／cm^2。
Based on the associated addition of TM1 （Nb, Ti） and TM2 （Al, Ga） to Nd-rich grain boundary phase, the sintered Nd-Fe-B magnets with super-high coercivity, high thermal stability and mechanical strength, and strong corrosion resistance were produced using the binary alloy sintering method. The properties of the magnet made of 94wt% （NdDyTb）12.69（FeCoNb）84.01B6.00 master alloy and 6wt% （NdDyTb）25（FeCoNbTiGaAl）68B7 sintering aid were as follows： Hci=2880 kA/m, Lift=5% （260 ℃, Pc=2.0）, αBr （22-220 ℃）= -0.110%/℃, βHci（22-220 ℃）= -0.381%/℃, σb=328 MPa, and △W7d =2.5 mg/cm^2.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第10期1865-1868,共4页
Rare Metal Materials and Engineering
关键词
超高矫顽力
热稳定性
力学强度
耐腐蚀性
烧结Nd-Fe—B磁体
super-high coercivity
thermal stability
mechanical strength
corrosion resistance
sintered Nd-Fe-B magnet
