NIMTE OpenIR  > 2018专题
Coercivity enhancement in Dy-free sintered Nd-Fe-B magnets by effective structure optimization of grain boundaries
Ding, Guangfei; Guo, Shuai; Chen, Ling; Di, Jinghui; Song, Jie; Chen, Renjie; Lee, Don; Yan, Aru
2018
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
Volume735Pages:795-801
AbstractIn 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.
KeywordPermanent-magnets Size Dependence Microstructure Phase Diffusion Decrease Alloy Force
Subject AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
Language英语
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/16798
Collection2018专题
Recommended Citation
GB/T 7714
Ding, Guangfei,Guo, Shuai,Chen, Ling,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 Ding, Guangfei.,Guo, Shuai.,Chen, Ling.,Di, Jinghui.,Song, Jie.,...&Yan, Aru.(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 Ding, Guangfei,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.
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