中文摘要：

采用声化学法、放电等离子烧结技术（SPS）和热变形工艺制备致密各向同性和各向异性Nd2Fe14B／α-Fe复合磁体，研究了软磁相包覆对磁体的结构和性能的影响．结果表明，软磁相α—Fe对各向同性Nd2Fe14B／α—Fe复合磁体的影响主要表现为增强两相间的交换耦合作用，从而提高剩磁．当α—Fe体积分数的数值适当（不超过2％）时，各向异性 Nd2Fe14B／α—Fe磁体形成较好的c轴晶体织构，具有较高的磁性能．α—Fe体积分数为1％的磁体性能最高：Br=1.367T，Hci=712 kA／m，（BH）m=327kJ／m^3．

英文摘要：

Full dense isotropic and anisotropic Nd2Fe14B/α-Fe nanocomposite magnets were prepared via sonochemistry method, spark plasma sintering （SPS） and hot deformation method. The effects of α-Fe volume fraction on the structure and magnetic properties of the magnets were investigated. For the isotropic magnets, the exchanging coupling and remanence increase as the α-Fe content increases. For the anisotropic magnets, only the magnets with no more than 2% α-Fe exhibit strong c-axis crystal texture of Nd2Fe14B phase, and the better magnetic properties are Br=1.367 T, Hci=712 kA/m, （BH）m= 327 kJ/m^3.