Nanoscale short-range ordering induced cellular structure and microchemistry evolution in Sm2Co17-type magnets
文献类型：期刊论文
| 作者 | Wu, Haichen; Zhang, Chaoyue; Liu, Zhuang; Wang, Guangqing; Lu, Huanming; Chen, Guoxin; Li, Yong; Chen, Renjie; Yan, Aru |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2020 |
| 卷号 | 200页码:883-892 |
| 关键词 | ELECTRON-MICROSCOPE MICROSTRUCTURE COERCIVITY CU MAGNETIZATION SEGREGATION MECHANISM |
| DOI | 10.1016/j.actamat.2020.09.057 |
| 英文摘要 | Sm2Co17-type permanent magnets have important application value due to their advanced magnetic properties, which can be ascribed to their unique cellular structure and element segregation in various phases developed after isothermal aging treatment. In this study, the evolution of the microstructure combined with the microchemistry of Sm2Co17-type magnets from solid solution precursor to the cellular structure is investigated, and a new insight into the formation of the cellular structure is provided. We report for the first time that a large number of strip-like nanoscale short-range ordered micro-domains are distributed in the disordered matrix of the solution precursor, which serve as the nucleation centers in the formation of the embryos of the cellular structure. Based on atomic scale structural analyses, a new mechanism concerning the ordering transformation from short-range 2:17R microtwins to long-range 2:17R phase is proposed, involving collective glide of three partial dislocations on successive basal planes with the net Burgers vector to be zero. Furthermore, microchemistry analysis reveals that the segregation of Cu and Fe in the early stage of isothermal aging is accelerated substantially during the ordering transformation, indicating that the ordering transformation can act as a new driving force for element segregation in Sm2Co17-type magnets. These findings provide new considerations for the development of high performance Sm2Co17-type magnets. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 学科主题 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20373]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Liu, Z 2.Yan, AR (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Ningbo 315201, Peoples R China. 3.Lu, HM (corresponding author), Chinese Acad Sci, Analyt Ctr, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wu, Haichen,Zhang, Chaoyue,Liu, Zhuang,et al. Nanoscale short-range ordering induced cellular structure and microchemistry evolution in Sm2Co17-type magnets[J]. ACTA MATERIALIA,2020,200:883-892. |
| APA | Wu, Haichen.,Zhang, Chaoyue.,Liu, Zhuang.,Wang, Guangqing.,Lu, Huanming.,...&Yan, Aru.(2020).Nanoscale short-range ordering induced cellular structure and microchemistry evolution in Sm2Co17-type magnets.ACTA MATERIALIA,200,883-892. |
| MLA | Wu, Haichen,et al."Nanoscale short-range ordering induced cellular structure and microchemistry evolution in Sm2Co17-type magnets".ACTA MATERIALIA 200(2020):883-892. |
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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