VP18-07 Studies of The Magnetic Properties of FeSiBCCr Amorphous Alloys Fabricated by Spark Plasma Sintering
Creators: Xin Wang
Zhiwei Lin
Shuaichao Yue
Qiang Chi
Xuanxuan Guo and Yongjian Li
Publisher: name: IEEE
Year: 2025

Fe-based amorphous soft magnetic alloys exhibit superior properties, such as high resistivity, high permeability, and saturation magnetization, compared to traditional materials like silicon steel and ferrite. FeSiBCCr powders are ideal candidates for integrated inductors used in high frequencies up to 200 KHz. However, fabricating techniques need to be innovated to optimize the characteristics of the inductors[1]. Normally, cold or hot pressing is used in sintering soft magnetic composites (SMCs). Spark plasma sintering (SPS), due to its low temperature, fast heating rate, and high densification capability, is an advanced technique to sinter binder-free amorphous SMC showing superior soft magnetic properties. While many studies have explored the static magnetization properties of bulk Fe-based amorphous alloys fabricated via SPS[2], a few studies investigate dynamic magnetization properties. This study uses custom-made measurement equipment to investigate the influence of the SPS process on static and dynamic magnetic properties of amorphous FeSiBCCr samples in real application conditions, for example, excited by non-sinusoidal waveforms. In addition, the impact of various annealing processes on magnetic properties is also investigated. The results show that sintering temperature significantly affects magnetic and mechanical properties. The elevated sintering temperature is of benefit to mechanical properties, but some crystallites which degrade the magnetic properties are formed at a certain temperature, which depends on the heating rate, sintering temperature and pressure. The detailed results will be presented in the full paper.References: [1]Jiaqi Liu, Yuan Gao and Pu Wang, Journal of Non-Crystalline Solids, Volume 622,122651(2023) [2]Dong Y, Liu J and Wang P, Materials,15,1106(2022)
Fe-based amorphous soft magnetic alloys exhibit superior properties, such as high resistivity, high permeability, and saturation magnetization, compared to traditional materials like silicon steel and ferrite. FeSiBCCr powders are ideal candidates for integrated inductors used in high frequencies up to 200 KHz. However, fabricating techniques need to be innovated to optimize the characteristics of the inductors[1]. Normally, cold or hot pressing is used in sintering soft magnetic composites (SMCs). Spark plasma sintering (SPS), due to its low temperature, fast heating rate, and high densification capability, is an advanced technique to sinter binder-free amorphous SMC showing superior soft magnetic properties. While many studies have explored the static magnetization properties of bulk Fe-based amorphous alloys fabricated via SPS[2], a few studies investigate dynamic magnetization properties. This study uses custom-made measurement equipment to investigate the influence of the SPS process on static and dynamic magnetic properties of amorphous FeSiBCCr samples in real application conditions, for example, excited by non-sinusoidal waveforms. In addition, the impact of various annealing processes on magnetic properties is also investigated. The results show that sintering temperature significantly affects magnetic and mechanical properties. The elevated sintering temperature is of benefit to mechanical properties, but some crystallites which degrade the magnetic properties are formed at a certain temperature, which depends on the heating rate, sintering temperature and pressure. The detailed results will be presented in the full paper.References: [1]Jiaqi Liu, Yuan Gao and Pu Wang, Journal of Non-Crystalline Solids, Volume 622,122651(2023) [2]Dong Y, Liu J and Wang P, Materials,15,1106(2022)