4.7 Article

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

Journal

SCRIPTA MATERIALIA
Volume 178, Issue -, Pages 34-38

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.11.003

Keywords

Sm2Co7 nanophase; Low-temperature; Hot deformation; Coercivity

Funding

  1. National Natural Science Foundation of China [51801005, 51931007, 51871005, 51701109]
  2. Natural Science Foundation of Beijing, China [2192007]
  3. China Postdoctoral Science Foundation [2018M641131, 2018M641132]

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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.

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