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| Home > Publications database > Development of high-coercivity state in high-energy and high-temperature Sm-Co-Fe-Cu-Zr magnets upon step cooling > print |
| 001 | 891726 | ||
| 005 | 20230111074315.0 | ||
| 024 | 7 | _ | |a 10.1016/j.jallcom.2019.153103 |2 doi |
| 024 | 7 | _ | |a 0925-8388 |2 ISSN |
| 024 | 7 | _ | |a 1873-4669 |2 ISSN |
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| 037 | _ | _ | |a FZJ-2021-01699 |
| 082 | _ | _ | |a 540 |
| 100 | 1 | _ | |a Popov, A. G. |0 0000-0003-1159-1726 |b 0 |
| 245 | _ | _ | |a Development of high-coercivity state in high-energy and high-temperature Sm-Co-Fe-Cu-Zr magnets upon step cooling |
| 260 | _ | _ | |a Lausanne |c 2020 |b Elsevier |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a The work compares the peculiarities of the high-coercivity state formation in the Sm-Co-Fe-Cu-Zr high-temperature and high-energy permanent magnets (HTPM and HEPM) in the course of the heat treatment with the stepwise decreasing temperature from 830 to 400 °C. Two types of magnets with varying Fe concentration, i.e., Sm(Co0.88-xFexCu0.09Zr0.03)7 with x = 0–0.12 (the HTPMs) and Sm(Co0.91-xFexCu0.06 Zr0.03)7.5 with x = 0.24–0.33 (the HEPMs) were studied at different temperatures of heat treatment for phase formation by x-ray diffraction followed by magnetic property measurements. Microstructure characterization was performed using transmission electron microscopy, whereas the three-dimensional elemental distribution at near-atomic scale was obtained using atom probe tomography. In HEPMs, the main increase in coercivity and relaxation of stresses accompanied by intensive enrichment of the 1:5 phase in Cu are observed at high temperatures (Т ≈ 700 °C). In HTPMs, the coercivity monotonously increases in the entire temperature range of the slow cooling from 700 to 400 °C at a rate of 0.5 °C/s. At the temperature close to the Curie temperature (∼550 °C) of the Sm(Co,Cu)5-type phase, the anomaly of the coercivity increment has been observed. The interphase stresses grow and the elemental redistribution appears to be accelerated simultaneously. The non-uniform Cu distribution in the 1:5 phase can be described by the formation of Cu-rich interlayers at the interface of the Sm(Co,Cu)5 and Sm2(Co,Fe)17-type phases. |
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| 700 | 1 | _ | |a Golovnia, O. A. |0 0000-0003-1794-6727 |b 1 |e Corresponding author |
| 700 | 1 | _ | |a Gaviko, V. S. |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Vasilenko, D. Yu |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Bratushev, D. Yu |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Balaji, V. I. Nithin |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Kovacs, Andras |0 P:(DE-Juel1)144926 |b 6 |
| 700 | 1 | _ | |a Pradeep, K. G. |0 0000-0001-9954-5307 |b 7 |
| 700 | 1 | _ | |a Gopalan, R. |0 0000-0003-2871-8682 |b 8 |
| 773 | _ | _ | |a 10.1016/j.jallcom.2019.153103 |g Vol. 820, p. 153103 - |0 PERI:(DE-600)2012675-X |p 153103 - |t Journal of alloys and compounds |v 820 |y 2020 |x 0925-8388 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/891726/files/16_Popov_JAC.pdf |y Published on 2019-11-20. Available in OpenAccess from 2021-11-20. |
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