To produce nanocomposite materials with high magnetic properties, studies concerning nanostructural processing technologies and control mechanisms are urgently required in aspects of achieving perfect alignment of the hard phase while keeping desired sizes and distributions of the soft phase. In the present study, a designed low-rate electroless deposition method is found to be an effective way in producing strong textured anisotropic Sm-Pr-Co/Co nanocomposites with unusual continuous soft-phase coatings when assembling Co particles on the ball-milled anisotropic Sm-Pr-Co hard phase. The average particle size of the soft-phase coatings is 18–50 nm and the obtained Sm-Pr-Co/Co composites exhibit a high intrinsic coercivity of H_ci = 748 kA/m with an enhanced remanence of M_r = 79 A·m²/g, as compared to H_ci = 836 kA/m and M_r = 68 A·m²/kg for uncoated Sm-Pr-Co hard phase. Moreover, the coating process study reveals a nucleation control mechanism for the formation of the continuous coating structures. Down-sized Sm-Pr-Co/Co nanocomposites with tailored size below 300 nm or even below 100 nm were also produced by this designed method. This study is of theoretical and practical importance for developing advanced nanostructures including the next generation permanent magnets.

为了生产具有高磁性的纳米复合材料，迫切需要研究纳米结构加工技术和控制机制，以实现硬相的完美排列，同时保持软相的所需尺寸和分布。在本研究中，发现设计的低速率化学沉积方法是在球磨各向异性上组装 Co 颗粒时产生具有不寻常的连续软相涂层的强纹理各向异性 Sm-Pr-Co/Co 纳米复合材料的有效方法Sm-Pr-Co 硬相。软相涂层的平均粒径为 18-50 nm，所获得的 Sm-Pr-Co/Co 复合材料表现出H _{ci = 748 kA/m 的高固有矫顽力和}M _r 增强的剩磁 = 79 A·m ² /g，而未涂覆的 Sm-Pr-Co 硬相的H _ci  = 836 kA/m 和M _r  = 68 A·m ² /kg。此外，涂层工艺研究揭示了连续涂层结构形成的成核控制机制。通过这种设计的方法，还可以生产尺寸小于 300 nm 甚至小于 100 nm 的小尺寸 Sm-Pr-Co/Co 纳米复合材料。这项研究对于开发包括下一代永磁体在内的先进纳米结构具有理论和实践意义。