دورية أكاديمية
Computational thermodynamics and microstructure simulations to understand the role of grain boundary phase in Nd-Fe-B hard magnets
| العنوان: | Computational thermodynamics and microstructure simulations to understand the role of grain boundary phase in Nd-Fe-B hard magnets |
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| المؤلفون: | Toshiyuki Koyama, Yuhki Tsukada, Taichi Abe |
| المصدر: | Science and Technology of Advanced Materials, Vol 22, Iss 1, Pp 1-13 (2021) |
| بيانات النشر: | Taylor & Francis Group, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials LCC:Biotechnology |
| مصطلحات موضوعية: | phase transformation, phase diagram, calphad method, phase-field method, Materials of engineering and construction. Mechanics of materials, TA401-492, Biotechnology, TP248.13-248.65 |
| الوصف: | To control the coercivity of Nd hard magnets efficiently, the thermal stability of constituent phases and the microstructure changes observed in hard magnets during thermal processes should be understood. Recently, the CALPHAD method and phase-field method have been recognized as promising approaches to realize phase stability and microstructure developments in engineering materials. Thus, we applied these methods to understand the thermodynamic feature of the grain boundary phase and the microstructural developments in Nd-Fe-B hard magnets. The results are as follows. (1) The liquid phase is a promising phase for covering the Nd2Fe14B grains uniformly. (2) The metastable phase diagram of the Fe-Nd-B ternary system suggests that the tie line end of the liquid phase changes drastically depending on the average composition of Nd. (3) The Nd concentration in the grain boundary phase can reach 100 at% if the volume fraction of the grain boundary phase is constrained. (4) The effect of Cu addition to the Nd-Fe-B system on the microstructural morphology is reasonably modeled based on the phase-field method. (5) The morphology of the liquid phase can be controlled using phase separation in the liquid phase and the grain size of the Nd2Fe14B phase. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1468-6996 1878-5514 14686996 |
| Relation: | https://doaj.org/toc/1468-6996; https://doaj.org/toc/1878-5514 |
| DOI: | 10.1080/14686996.2020.1859339 |
| URL الوصول: | https://doaj.org/article/e4779b25e3ff434ba1e21042ba70f6c1 |
| رقم الأكسشن: | edsdoj.4779b25e3ff434ba1e21042ba70f6c1 |
| قاعدة البيانات: | Directory of Open Access Journals |
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Full Text Finder | تدمد: | 14686996 18785514 |
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| DOI: | 10.1080/14686996.2020.1859339 |