Sm2Co7 nanophase inducing low-temperature hot deformation to fabricate high performance SmCo5 magnet

We report a novel design to fabricate high performance SmCo5 magnet by using Sm2Co7 nanophase inducing low-temperature hot deformation. Our approach can reduce the hot deformation temperature to 650 degrees C from the previous 900 degrees C to obtain nanocrystalline magnets with good c-axis texture. As a consequence, a giant coercivity of 25.6 kOe is achieved in the anisotropic magnet, which is 4 times the value reported previously. Ascribed to the large coercivity, our magnet represents good thermal stability, which possesses a maximum magnetic energy product of 10.6 MGOe at 300 degrees C, maintaining 75% of that at room temperature. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.