| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Microstructure and magnetocaloric properties in melt-spun and high-pressure hydrogenated La0.5Pr0.5Fe11.4Si1.6 ribbons |
| Qian Liu(刘倩)1,2, Min Tong(佟敏)1, Xin-Guo Zhao(赵新国)1,2,†, Nai-Kun Sun(孙乃坤)3,‡, Xiao-Fei Xiao(肖小飞)1,2, Jie Guo(郭杰)1,2, Wei Liu(刘伟)1,2, and Zhi-Dong Zhang(张志东)1,2 |
1 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China;
3 School of Science, Shenyang Ligong University, Shenyang 110159, China |
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Abstract The effects of wheel speeds and high-pressure hydrogen treatment on phase evolution, microstructure, and magnetocaloric properties in La0.5Pr0.5Fe11.4Si1.6 melt-spun ribbons are studied in this work. The results reveal that the increase of wheel speed is beneficial to the formation of cubic NaZn13-type phase and the grain refinement. The optimized wheel speed for microstructural and magnetocaloric properties is 30 m/s. The largest entropy change of 18.1 J/kg·K at 190 K under a magnetic field change of 0 T-5 T is obtained in La0.5Pr0.5Fe11.4Si1.6 ribbons melt-spun at 30 m/s. After a high-pressure hydrogen treatment of 50 MPa, the Curie temperature of the ribbons prepared at 30 m/s is adjusted to about 314 K and the large -ΔSM of 17.9 J/kg·K under a magnetic field change of 0 T-5 T is achieved at room temperature with almost none hysteresis loss. The small thermal and magnetic hysteresis and the large -ΔSM make the La0.5Pr0.5Fe11.4Si1.6 hydride ribbons appropriate for magnetic refrigerant applications around room temperature.
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Received: 24 December 2020
Revised: 25 January 2021
Accepted manuscript online: 01 March 2021
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PACS:
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75.30.Sg
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(Magnetocaloric effect, magnetic cooling)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51771197), the Fund from the Chinese Academy of Sciences (Grant No. KJZD-EW-M05), and the Liaoning Revitalization Talents Program, China (Grant No. XLYC1807122). |
Corresponding Authors:
Xin-Guo Zhao, Nai-Kun Sun
E-mail: xgzhao@imr.ac.cn;naikunsun@163.com
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Cite this article:
Qian Liu(刘倩), Min Tong(佟敏), Xin-Guo Zhao(赵新国), Nai-Kun Sun(孙乃坤), Xiao-Fei Xiao(肖小飞), Jie Guo(郭杰), Wei Liu(刘伟), and Zhi-Dong Zhang(张志东) Microstructure and magnetocaloric properties in melt-spun and high-pressure hydrogenated La0.5Pr0.5Fe11.4Si1.6 ribbons 2021 Chin. Phys. B 30 087502
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