Recent progress in the development of high-performance bonded magnets using rare earth-Fe compounds
| Autor: | Takashi Horikawa, Satoshi Sugimoto, Masao Yamazaki, Masashi Matsuura |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Intermetallic Sintering Review Article anisotropy Industrial and Manufacturing Engineering Phase (matter) Powder metallurgy Materials Chemistry General Materials Science coercivity hydrogenation disproportionation desorption recombination (hddr) Materials of engineering and construction. Mechanics of materials Mechanical Engineering nanoparticle Metallurgy Thermal decomposition Metals and Alloys 40 Optical magnetic and electronic device materials Coercivity Magnet TA401-492 Focus on Science and Technology of Element-Strategic Permanent Magnets Grain boundary 203 Magnetics / Spintronics / Superconductors oxygen TP248.13-248.65 Biotechnology |
| Zdroj: | Science and Technology of Advanced Materials, Vol 22, Iss 1, Pp 729-747 (2021) Science and Technology of Advanced Materials article-version (VoR) Version of Record |
| ISSN: | 1468-6996 |
| Popis: | Permanent magnets, and particularly rare earth magnets such as Nd-Fe-B, have attracted much attention because of their magnetic properties. There are two well-established techniques for obtaining sintered magnets and bonded Nd-Fe-B magnets. Powder metallurgy is used to obtain high-performance anisotropic sintered magnets. To produce bonded magnets, either melt-spinning or the hydrogenation, disproportionation, desorption, and recombination process is used to produce magnet powders, which are then mixed with binders. Since the development of Nd-Fe-B magnets, several kinds of intermetallic compounds have been reported, such as Sm2Fe17Nx and Sm(Fe,M)12 (M: Ti, V, etc.). However, it is difficult to apply a liquid-phase sintering process similar to the one used for Nd-Fe-B sintered magnets in order to produce high-performance Sm-Fe–based sintered magnets because of the low decomposition temperature of the compound and the lack of a liquid grain boundary phase like that in the Nd-Fe-B system. Therefore, bonded magnets are useful in the production of bulk magnets using these Sm-Fe-based compounds. This article reviews recent progress in our work on the development of high-performance bonded magnets using Nd2Fe14B and Sm2Fe17Nx compounds. Graphical Abstract |
| Databáze: | OpenAIRE |
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