On the microstructural evolution and accelerated magnetocaloric phase formation in La-Fe-Si alloys by hot forging deformation
文献类型：期刊论文
| 作者 | Lu, Xiang; Zhang, Yifei; Wang, Fengqing; Zhang, Mingxiao; Liu, Jian |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2021 |
| 卷号 | 221 |
| 关键词 | MAGNETIC ENTROPY CHANGE HIGH-TEMPERATURE CO TRANSITION PROPERTY LA(FE PERFORMANCE SI)(13) ENERGY STEEL |
| 英文摘要 | To solve the difficulty in forming magnetocaloric phase in La-Fe-Si alloys due to intrinsic incompleteness of peritectic reaction and slow diffusion rate, we proposed here a new approach of hot forging deformation to accelerate the phase formation. The evolution of phase constitution, grain structure and magnetocaloric effect has been systematically investigated, and the underlying mechanism was revealed. It was found that a novel microstructure, consisting of refined layer phases and high-density grain boundaries, formed during the forging deformation and played a key role in promoting the phase formation process. As a result, a dominant La(Fe, Si)(13) phase with a volume fraction of 82.2% was obtained in the 84.4% deformed sample after annealing at 1323 K for only 1 h. This led to a large magnetic entropy change of 14.6 J/kg K at 2 T compared with 1.3 J/kg K for the non-deformed sample. A prominent magnetic entropy change of 19.4 J/kg K at 2 T was obtained after annealing for 12 h and hydrogenating, and the integrity of the sample was maintained. The current results suggest that the hot forging deformation effectively facilitates the magnetocaloric phase formation in La-Fe-Si alloys, and becomes a promising route for mass production of near-net-shape magnetic refrigerants. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21264]  |
| 专题 | 2021专题_期刊论文 |
| 作者单位 | 1.Liu, J (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Peoples R China. 2.Zhang, MX 3.Liu, J (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Ningbo 315201, Peoples R China. 4.Liu, J (corresponding author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China. 5.Liu, J (corresponding author), Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Lu, Xiang,Zhang, Yifei,Wang, Fengqing,et al. On the microstructural evolution and accelerated magnetocaloric phase formation in La-Fe-Si alloys by hot forging deformation[J]. ACTA MATERIALIA,2021,221. |
| APA | Lu, Xiang,Zhang, Yifei,Wang, Fengqing,Zhang, Mingxiao,&Liu, Jian.(2021).On the microstructural evolution and accelerated magnetocaloric phase formation in La-Fe-Si alloys by hot forging deformation.ACTA MATERIALIA,221. |
| MLA | Lu, Xiang,et al."On the microstructural evolution and accelerated magnetocaloric phase formation in La-Fe-Si alloys by hot forging deformation".ACTA MATERIALIA 221(2021). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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