Abstract
The effects of Si addition on the nano-eutectic structure and soft magnetic properties of bulk Fe83B17−xSix (x=0–5at%) alloy rods were investigated. The addition of Si increases the volume fraction of the α-Fe dendrite phase and decreases the average lamellar spacing of the eutectic structure to less than 100nm. As a result, the intrinsic coercivity (Hc) is decreased effectively, while the saturation magnetization (Ms) remains stable. The annealing experiments of the Fe83B13Si4 alloy show further that addition of a less than 4at% Si content can improve the thermal stability of the nano-lamellar eutectic structure and the soft magnetic properties.
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