LAUSR

Abstract We report the fabrication of bulk anisotropic (SmCo + FeCo)/NdFeB multicomponent nanocomposite magnets using high-pressure thermal compression (HPTC). The correlations among microstructure, magnetic properties, heating temperature and composition of the HPTC nanocomposite magnets were studied. The HPTC magnet made under variable temperatures (VT), with 19 wt% of FeCo phase, exhibits a maximum energy product of 32 MGOe, which is much higher than that (14 MGOe) for the HPTC magnet made under a constant temperature (CT). When the FeCo content increases to ∼23 wt%, the HPTC magnet made under VT still remains a high energy product of about 25 MGOe. With increasing NdFeB content, the (SmCo + FeCo)/NdFeB multicomponent nanocomposite magnets exhibit an enhanced magnetic anisotropy and coercivity. This work is beneficial to fabricating high-performance and low-cost permanent magnets for practical applications.