Characteristics of Fe-Si-B-Cr-C Powders Synthesized by the Spinning Water Atomization Process (SWAP) and its Application in Magnetic Core

Abstract

The application properties of magnetic cores made of Fe72.8Si11.2B10.8Cr2.3C2.9 powders was studied. The amorphous Fe72.8Si11.2B10.8Cr2.3C2.9 powders were prepared by a spinning water atomization process (SWAP), and the cores further were fabricated from those powders by a hydraulicpressing process. The particle size distribution of powders was about 10 to 20 μmand the alloy powders would crystallize during milling. For the cores, the maximum permeability μi was 14 and quality factor Q was 84 between 100kHz - 2000kHz for 1 wt.% Na2SiO4solidified with H-epoxy at 300°C. The minimum coercivityHcwas 0.22 Oe at 1 wt.% Na2SiO4 with PVB consolidated at 150 °C, and the maximum saturation magnetization Bm was 7.64×102 G for 2 wt.% Na2SiO4 with H-epoxy at 300 °C.