Nanocomposite Nd-Fe-Ti-B magnets produced by melt spinning and flash annealing
| Autor: | Kenta Takagi, Takahiro Kuriiwa, Akihide Hosokawa |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Nanocomposite Annealing (metallurgy) 02 engineering and technology Coercivity 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Magnetization Nuclear magnetic resonance Permeability (electromagnetism) Magnet 0103 physical sciences Melt spinning Composite material 0210 nano-technology |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 439:220-227 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2017.05.023 |
| Popis: | We have attempted to fabricate a nanocomposite Nd-Fe-Ti-B magnet. Flash-lamp rapid annealing treatments were performed for melt-spun ribbons to obtain the α-Fe/Nd 2 Fe 14 B composite microstructure, and the evolution of magnetic properties by the annealing was studied by vibration sample magnetometer (VSM). It was found that the magnetic properties were improved by relatively short-time annealing at the temperatures near the crystallization temperature. Further higher-temperature and longer annealing treatments resulted in deterioration of the magnetic properties. For the selected samples, recoil curves were measured to analyze the spring-back behaviors. Transmission electron microscopy (TEM) was performed to investigate the microstructural factors for the deterioration of the magnetic properties. The relation between the variation of the magnetic properties (coercivity, saturation magnetization and recoil permeability) and the microstructural factors were discussed. |
| Databáze: | OpenAIRE |
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