| Autor: |
Feng Xia, Qisong Sun, Minggang Zhu, Yu Wang, Yikun Fang, Wei Li |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Materials & Design, Vol 216, Iss , Pp 110590- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
0264-1275 |
| DOI: |
10.1016/j.matdes.2022.110590 |
| Popis: |
A novel design concept was proposed for optimizing the grain boundaries from the theoretical aspect, which could play the self-compensation effect on the thermal stability of the coercivity. The Pr-Nd-Al Ce magnet without critical elements was investigated that experimentally verified the self-compensation effect of grain boundaries structure on the thermal stability of the coercivity. As a result, the Pr-Nd-Al Ce magnet with 3 wt% (Pr0.25Nd0.75)80Al20 as the additive inside the grain boundaries had better thermal stability than that of Nd-Fe-B magnet. The coercivity temperature coefficient β of Pr-Nd-Al Ce magnet was improved by 5.7%, and the irreversible loss of magnetic flux hirr was enhanced by 58% at the temperature of 100 ℃ compared with the Nd-Fe-B magnet. The improvement of thermal stability was attributed to the special sandwich-like structure consisting of two amorphous nonmagnetic phases sandwiching a layer of Re6(Fe, TM)11Al3 tetragonal phase, that compensated the coercivity of Ce magnets without critical elements. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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