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Grain boundary wetting in the NdFeB-based hard magnetic alloys |
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| Authors: | B. B. Straumal Yu. O. Kucheev I. L. Yatskovskaya I. V. Mogilnikova G. Schütz A. N. Nekrasov B. Baretzky |
| Affiliation: | 1. Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Russia, 142432 2. National University of Science and Technology “MISiS”, Leninsky Prospect 4, Moscow, Russia, 119991 3. Max-Planck Institut für Intelligente Systeme (Former Institut für Metallforschung), Heisenbergstra?e 3, 70569, Stuttgart, Germany 5. Karlsruher Institut für Technologie (KIT), Institut für Nanotechnologie, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany 4. Institute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka, Moscow, Russia, 142432 |
| Abstract: | Since the end of 1980s, NdFeB-based hard magnetic alloys have been the materials with the highest available magnetic performance. NdFeB-based magnets are produced either by liquid-phase sintering or by melt spinning. In the present investigation, NdFeB alloys quenched after annealing in the semi-liquid state are used to study the wetting of Nd2Fe14B grain boundaries by a Nd-rich liquid phase. It is shown that a transition from partial wetting to complete wetting occurs with increasing temperature. The results are compared with the data in the literature for NdFeB-based alloys processed by liquid-phase sintering. The relation between wetting properties and magnetic performance of these alloys is also discussed. |
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