Magnetic characterization of dual phase FeZrB soft magnetic alloy

摘要

The magnetic properties and the annealing process of Fe7sZr7B15 amorphous ribbons are investigated by X-ray diffraction (XRD), differential scanning calorimetry, and vibrating sample magnetometer. The fully amorphous structure of the as-quenched ribbons is confirmed by the XRD pattern. The Curie temperature and the saturation magnetization Ms of the ribbons are 305 C and 124.3 emu/g, respectively. Annealing at 550 C can result in an increase in Ms with annealing time due to the increasing crystallized volume fraction of a-Fe phase. The optimized annealing process is established at 550 C for 20-30 min with maximum Ms of 146.6 emu/g. The morphology of the ribbons annealed at 550 C is observed by scanning electron microscopy, showing that nanocrystalline a-Fe grains are dispersed in an amorphous matrix.