Comprehensive performance of a ball-milled La0.5Pr0.5Fe11.4Si1.6B0.2Hy/Al magnetocaloric composite

doi:10.1088/1674-1056/ac280b

中国物理B ›› 2022, Vol. 31 ›› Issue (4): 47503-047503.doi: 10.1088/1674-1056/ac280b

Comprehensive performance of a ball-milled La_0.5Pr_0.5Fe_11.4Si_1.6B_0.2H_y/Al magnetocaloric composite

Jiao-Hong Huang(黄焦宏)¹, Ying-De Zhang(张英德)¹, Nai-Kun Sun(孙乃坤)^2,†, Yang Zhang(张扬)², Xin-Guo Zhao(赵新国)^3,‡, and Zhi-Dong Zhang(张志东)³

1 State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou 014030, China;
2 School of Science, Shenyang Ligong University, Shenyang 110159, China;
3 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

收稿日期:2021-08-15 修回日期:2021-09-13 接受日期:2021-09-18 出版日期:2022-03-16 发布日期:2022-03-21
通讯作者: Nai-Kun Sun, Xin-Guo Zhao E-mail:naikunsun@163.com;xgzhao@imr.ac.cn
基金资助:
Project supported by the Open Research Project of State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization and the National Natural Science Foundation of China (Grant Nos. 51771197 and 52171187).

Comprehensive performance of a ball-milled La_0.5Pr_0.5Fe_11.4Si_1.6B_0.2H_y/Al magnetocaloric composite

Jiao-Hong Huang(黄焦宏)¹, Ying-De Zhang(张英德)¹, Nai-Kun Sun(孙乃坤)^2,†, Yang Zhang(张扬)², Xin-Guo Zhao(赵新国)^3,‡, and Zhi-Dong Zhang(张志东)³

1 State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization, Baotou Research Institute of Rare Earths, Baotou 014030, China;
2 School of Science, Shenyang Ligong University, Shenyang 110159, China;
3 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Received:2021-08-15 Revised:2021-09-13 Accepted:2021-09-18 Online:2022-03-16 Published:2022-03-21
Contact: Nai-Kun Sun, Xin-Guo Zhao E-mail:naikunsun@163.com;xgzhao@imr.ac.cn
Supported by:
Project supported by the Open Research Project of State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization and the National Natural Science Foundation of China (Grant Nos. 51771197 and 52171187).

摘要/Abstract

摘要： Due to the hydrogen embrittlement effect, La(Fe,Si)₁₃-based hydrides can only exist in powder form, which limits their practical application. In this work, ductile and thermally conductive Al metal was homogeneously mixed with La_0.5Pr_0.5Fe_11.4Si_1.6B_0.2 using the ball milling method. Then hydrogenation and compactness shaping of the magnetocaloric composites were performed in one step via a sintering process under high hydrogen pressure. As the Al content reached 9 wt.%, the La_0.5Pr_0.5Fe_11.4Si_1.6B_0.2H_y/Al composite showed the mechanical behavior of a ductile material with a yield strength of ~44 MPa and an ultimate strength of 269 MPa accompanied by a pronounced improvement in thermal conductivity. Due to the ease of formation of Fe-Al-Si phases and the several micron and submicron sizes of the composite particles caused by ball milling process, the magnetic entropy change of the composites was substantially reduced to ~1.2 J/kg· K-1.5 J/kg· K at 0 T-1.5 T.

关键词: ball milling, mechanical behavior, room-temperature magnetic refrigeration, La(Fe,Si)₁₃

Abstract: Due to the hydrogen embrittlement effect, La(Fe,Si)₁₃-based hydrides can only exist in powder form, which limits their practical application. In this work, ductile and thermally conductive Al metal was homogeneously mixed with La_0.5Pr_0.5Fe_11.4Si_1.6B_0.2 using the ball milling method. Then hydrogenation and compactness shaping of the magnetocaloric composites were performed in one step via a sintering process under high hydrogen pressure. As the Al content reached 9 wt.%, the La_0.5Pr_0.5Fe_11.4Si_1.6B_0.2H_y/Al composite showed the mechanical behavior of a ductile material with a yield strength of ~44 MPa and an ultimate strength of 269 MPa accompanied by a pronounced improvement in thermal conductivity. Due to the ease of formation of Fe-Al-Si phases and the several micron and submicron sizes of the composite particles caused by ball milling process, the magnetic entropy change of the composites was substantially reduced to ~1.2 J/kg· K-1.5 J/kg· K at 0 T-1.5 T.

Key words: ball milling, mechanical behavior, room-temperature magnetic refrigeration, La(Fe,Si)₁₃

中图分类号: (Magnetocaloric effect, magnetic cooling)

75.30.Sg

62.20.-x (Mechanical properties of solids)

Jiao-Hong Huang(黄焦宏), Ying-De Zhang(张英德), Nai-Kun Sun(孙乃坤), Yang Zhang(张扬), Xin-Guo Zhao(赵新国), and Zhi-Dong Zhang(张志东). Comprehensive performance of a ball-milled La_0.5Pr_0.5Fe_11.4Si_1.6B_0.2H_y/Al magnetocaloric composite[J]. 中国物理B, 2022, 31(4): 47503-047503.

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Comprehensive performance of a ball-milled La_0.5Pr_0.5Fe_11.4Si_1.6B_0.2H_y/Al magnetocaloric composite

Comprehensive performance of a ball-milled La_0.5Pr_0.5Fe_11.4Si_1.6B_0.2H_y/Al magnetocaloric composite

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