期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 818, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152908
关键词
Sm2Co17-type; Sintered magnets; Magnetic properties; Microstructure; Influence mechanism
资金
- National Natural Science Foundation of China [51771176/51781205]
- Natinal Natural Science Young's Foundation of China [51801196]
The effects of the Fe content on the magnetic properties and the microstructures of the Sm(Co0.925-xFexCu0.05Zr0.025)(7.74) (x = 0.21-0.31) sintered magnets were investigated. The influence mechanism of the Fe content on the remanence (B-r) and intrinsic coercivity (H-cj) of the magnets were studied depending on the comprehensive analysis of the cellular/lamellar structures and the element distribution of the cell and cell wall phases. The incomplete cellular structure, lower Cu content and higher Fe content of the cell wall phases were considered as the main reasons for the low H-cj of the magnet with x = 0.31. The slope of linear increase of the B-r of the magnet with x range from 0.27 to 0.31 is lower than that of the magnet with x range from 0.21 to 0.27 indicating a lower B-r enhancement efficiency which is mainly caused by the high Fe content of the cell wall phase of the magnet with x > 0.27. A high maximum energy product ((BH)(max)) of 32.36 MGOe with a H-cj of 34.62 kOe was obtained for the Sm(Co0.655Fe0.27Cu0.05Zr0.025) 7.74 magnet. (C) 2019 Elsevier B.V. All rights reserved.
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