Journal
SCRIPTA MATERIALIA
Volume 132, Issue -, Pages 44-48Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.01.026
Keywords
SmCo-based magnets; High temperature magnets; Magnetic properties; Element distribution
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Funding
- Major State Research Development Program of China (973 Program) [2014CB643701]
- National Natural Science Foundation of China [51571064, 51371054]
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Two kinds of Sm(CobalFe0.1Cu0.09Zr0.03)(7.24) high temperature magnets were fabricated by a traditional powder metallurgical technology with different annealing processes. A record of maximum energy product of 94.73 kJ/m(3) at 773 K with a high intrinsic coercivity of 652.72 kA/m was made. Based on the theoretical and experimental results, it was found that the temperature coefficient of the coercivity was strongly influenced by the variation of the Curie temperature of the cell wall phases and the domain wall energy ratio between cell and cell wall phases at 0 K. The characteristic properties originate from the element redistribution between SmCo5/Sm2Co17 interfaces while annealing. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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