Coercivity enhancement in Dy-free sintered Nd-Fe-B magnets by effective structure optimization of grain boundaries
文献类型:期刊论文
作者 | Guo, Shuai; Chen, Ling; Yan, Aru; Ding, Guangfei; Di, Jinghui; Song, Jie; Chen, Renjie; Lee, Don |
刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
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出版日期 | 2018 |
卷号 | 735页码:795-801 |
关键词 | Permanent-magnets Size Dependence Microstructure Phase Diffusion Decrease Alloy Force |
英文摘要 | In this study, we presented an effective approach for the substantial coercivity enhancement of Dy-free sintered Nd-Fe-B magnets with Ga-doping. The coercivity was substantially enhanced from 10.1 kOe to 19.8 kOe by effective microstructure optimization and phase constitution regulation in antecedent alloys. A good isolation of 2:14:1 grains by Nd-rich intergranular phase is obtained in final magnets accompanying with the formation of intermetallic Nd6Fe13Ga phase. However, when dehydrogenating above 500 degrees C, masses of preformed Nd6Fe13Ga phases are detected in the initial strip casting alloys and the homologous magnet suffers an unanticipated degradation of coercivity. Magnetic domain observation and thermal magnetic analysis imply a pronounced difference in the magnetism of grain boundary (GB) phases, which closely associated with the composition homogeneity of Nd-rich phases in antecedent alloys. The mechanism of the coercivity variation in the sintered magnets with different GBs magnetism is discussed based on magnetic behavior analysis. (C) 2017 Elsevier B.V. All rights reserved. |
学科主题 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
语种 | 英语 |
公开日期 | 2018-12-04 |
源URL | [http://ir.nimte.ac.cn/handle/174433/16798] ![]() |
专题 | 2018专题 |
推荐引用方式 GB/T 7714 | Guo, Shuai,Chen, Ling,Yan, Aru,et al. Coercivity enhancement in Dy-free sintered Nd-Fe-B magnets by effective structure optimization of grain boundaries[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,735:795-801. |
APA | Guo, Shuai.,Chen, Ling.,Yan, Aru.,Ding, Guangfei.,Di, Jinghui.,...&Lee, Don.(2018).Coercivity enhancement in Dy-free sintered Nd-Fe-B magnets by effective structure optimization of grain boundaries.JOURNAL OF ALLOYS AND COMPOUNDS,735,795-801. |
MLA | Guo, Shuai,et al."Coercivity enhancement in Dy-free sintered Nd-Fe-B magnets by effective structure optimization of grain boundaries".JOURNAL OF ALLOYS AND COMPOUNDS 735(2018):795-801. |
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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