AI Article Synopsis
- * Bonded magnets can be produced using techniques like melt-spinning and hydrogenation, which involve creating magnet powders that are then combined with binders.
- * The article focuses on the challenges and advancements in developing high-performance bonded magnets with Nd-Fe-B and SmFeN compounds, particularly highlighting the difficulties in using Sm-Fe for sintering compared to Nd-Fe-B.
Article Abstract
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 SmFeN and Sm(Fe,M) (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 NdFeB and SmFeN compounds.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8451657 | PMC |
| http://dx.doi.org/10.1080/14686996.2021.1944780 | DOI Listing |
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