Effect of Fe to P concentration ratio on structures, crystallization behavior, and magnetic properties in (Fe_(0.79+x)P_(0.1-x)C_(0.04)B_(0.04)Si_(0.03))_(99)Cu_1 alloys

摘要

The effect of Fe to P concentration ratio on structures, crystallization behavior, and magnetic properties in (Fe_(0.79+x)P_(0.1-x)C_(0.04)B_(0.04)Si_(0.03))_(99)Cu_1 alloys was investigated. The increase of Fe to P concentration ratio changes the structure and crystallization process of as-quenched ribbon. Nanocrystalline alloys with excellent soft magnetic properties were synthesized upon annealing the as-quenched ribbon with primary crystals. The (Fe_(0.84)P_(0.05)C_(0.04)B_(0.04)Si_(0.03))_(99)Cu_1 nanocrystalline alloy exhibits excellent magnetic properties, such as high saturation magnetic flux density of 1.74 T, low coercivity of 4.9 A/m, high effective permeability of 22 900 (at 1 kHz), low core loss of 3.1 W/kg at 1.0 T and 400 Hz, and 8.9 W/kg at 1.0 T and 1 kHz, respectively.