Magnetic Properties of Fe-Based Amorphous Powders With High-Saturation Induction Produced by Spinning Water Atomization Process (SWAP)

Fe-based amorphous powders with high magnetic flux density were fabricated in an extremely high cooling rate of over 10 ⁶ K/s by spinning water atomization process (SWAP). The composition of the alloys studied were Fe ₇₉(Si _0.5B _0.5) ₁₉C ₂ and Fe _x(Si _0.3B _0.7) _98-xC ₂ (x = 79,80,81,83,84). The saturation flux density Bs increased with increasing iron content. For Fe ₈₃(Si _0.3B _0.7) ₁₅C ₂, the Bs value was 1.64 T, which is 31% higher than that of our previously developed (Fe _0.97Cr _0.03) ₇₆(Si _0.5B _0.5) ₂₂C ₂ alloy. Furthermore, consolidated cores of amorphous powders were also fabricated by compact-pressing techniques.