Enhancing the Properties of FeSiBCr Amorphous Soft Magnetic Composites by Annealing Treatments

Abstract

Fe-based amorphous powder cores (AMPCs) were prepared from FeSiBCr amorphous powders with phosphate–resin hybrid coating. The high-frequency magnetic properties of AMPCs annealed at different temperatures were systematically studied. After annealing at low temperatures, the effective permeability and core loss improved due to the internal stress of the powder cores being released. The sample annealed at 480 °C exhibits the lowest hysteresis loss of about 29.6 mW/cm3 at 800 kHz as well as a maximum effective permeability of 36.4, remaining stable until 3 MHz, which could be useful for high-frequency applications.

Advances in Metal-Containing Magnetic Materials and Magnetic Technologies

“…They also found that the content of La has an important effect on the primary crystallization temperature and the secondary crystallization temperature of the alloys. Yu et al [4] prepared Fe-based amorphous magnetic cores (AMPCs) from FeSiBCr amorphous powders with phosphate-resin hybrid coatings. The high-frequency magnetic properties of AMPCs annealed at different temperatures were systematically studied.…”

Effects of Stress on Loss and Magnetic Properties of Fe80Co3Si3B10P1C3 Amorphous Iron Cores

“…Furthermore, the ideal annealing temperature is typically 80-120 • C lower than T x1 , serving as a guideline for annealing [20]. Figure 2c shows two crystallization peaks, with the first corresponding to the α-Fe phase precipitation and the second to the Fe-B phase formation [21][22][23][24]. The crystallization peak temperatures of CAF4 are lower than those of 1K101, with a difference (∆T p ) of 113 • C. Based on DSC results and the XRD pattern of the amorphous iron core, shown in Figure 2c, it is evident that when CAF4 is annealed at ≤290 • C, it remains in an amorphous state, as indicated by a diffuse diffraction peak near 2θ = 45 • .…”

“…Furthermore, the ideal annealing temperature is typically 80-120 • C lower than T x1 , serving as a guideline for annealing[20]. Figure2cshows two crystallization peaks, with the first corresponding to the α-Fe phase precipitation and the second to the Fe-B phase formation[21][22][23][24]. The crystallization peak temperatures of CAF4 are lower than those of 1K101, with a difference (∆T p ) of 113 • C.…”

First-Principles Study on the Stability, Site Preference, Electronic Structure and Magnetism of Alloyed Fe3B with Ni3P-Type Structure

“…Metastable Fe 3 B is an attractive magnetic compound due to its large saturation magnetization and reasonably strong magnetic anisotropy. In particular, it appears in various important magnetic materials, such as nanocomposite permanent magnets (e.g., Fe 3 B/Nd 2 Fe 14 B) [ 2 , 3 , 4 , 5 ] and Fe-B-based amorphous and nanocrystalline soft magnetic alloys [ 6 , 7 , 8 , 9 ]. For the nanocomposite permanent magnets, Fe 3 B, as the main phase and providing large saturation magnetization, interacts with hard magnetic phase (e.g., Nd 2 Fe 14 B) by exchange-coupling interaction, achieving large energy production.…”