| Autor: |
Shen, Rui, Xu, Shuainan, Wang, Congyi, Yang, Enxiang, Liu, Xiaolian, Fu, Song, Jin, Weiyang, Pan, Yu, Zhao, Lizhong, Guan, Pengfei, Zhang, Xuefeng |
| Zdroj: |
Journal of Materials Chemistry C; 1/7/2025, Vol. 13 Issue 1, p373-384, 12p |
| Abstrakt: |
The grain boundary phase with the chemical composition Nd6Fe13Ga in Nd–Fe–B sintered magnets has been the subject of considerable research interest due to its role in optimizing grain boundaries; however, it also presents a novel challenge regarding corrosion behavior. In this study, the regulation mechanism of Nd6Fe13Ga grain boundary-reconstructed magnets with concurrent improvements in coercivity and anti-corrosive properties was investigated. Results indicated that the formed non-ferromagnetic Nd6Fe13Ga phase and the modified Cu-rich continuous grain boundaries after Nd6Fe13Ga reconstruction contributed to the promotion of magnetic isolation and a reduction in the corrosion potential difference with the 2 : 14 : 1 phase. The underlying mechanisms of the corrosion behavior were further elucidated through in situ microstructural characterization and first-principles calculations of electron work functions for different phases. This study proposes an effective solution to enhance the magnetic properties and anti-corrosion simultaneously in Nd–Fe–B sintered magnets. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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