A5102796773- Magnetic Properties of Alloys
- Magnetic Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Magnetic properties of thin films
- Thermal Expansion and Ionic Conductivity
Korea Institute of Materials Science
2024
ThMn12-type Sm(FeV)12 magnets with high coercivity (Hc) demonstrate promising potential as alternative rare-earth-lean permanent magnets. This study delves into the microstructure and magnetic properties influenced by Sm content in SmxFe10V2 (x = 1.4-1.9) alloy. High-density SmFe10V2 bulks were prepared through a jet-milling process, followed high-pressure pressing heat treatment. Upon increasing beyond 1.6, heat-treated exhibited predominant ThMn12 phase, accompanied secondary phase –...
Anisotropic bulk magnets of ThMn12-type SmFe10V2 with a high coercivity (Hc) were successfully fabricated. Powders varying particle sizes prepared using the ball milling process, where size was controlled time. A decrease in Hc occurred heat-treated pressed from large-sized powders, while heavy oxidation excessively small leading to decomposition (1–12) phase. The highest 8.9 kOe achieved powders ball-milled for 5 h due formation grain boundary To improve maximum energy product ((BH)max),...
We explored the potential for an aging treatment to achieve high coercivity, of 0.859 MA/m, in a SmFe10V2 alloy with ThMn12-type structure. Bulk magnets were fabricated by sintering ball-milled powders, followed treatment. XRD and SEM analyses revealed that promotes formation Sm-rich grain boundary phase nano-scale thickness. The Sm content (~60–80 at.%) low Fe (~20–30 led non-ferromagnetism, enhancing coercivity isolating 1–12 grains weakening dipolar interaction between grains. temperature...