The soft magnetic properties of ring-shaped (Co_(0.6)Fe_(0.3)Ni_(0.1))68(B_(0.811)Si_(0.189))_(27)Nb_5 bulk metallic glasses

摘要

Ring-shaped (Co_(0.6)Fe_(0.3)Ni_(0.1))_(68)(B_(0.811)Si_(0.189))_(27)Nb_5 bulk samples with an outer diameter of 10 mm, an inner diameter of 6 mm, and a thickness of 1 mm were successfully prepared by copper mold casting. The effects of annealing treatments on magnetic properties of the ring-shaped bulk sample were investigated. After the optimum annealing treatment, the resulting ring-shaped bulk sample exhibits good magnetic properties, i.e., low coercive force of 0.55 A/m, high maximum permeability of 433 000, and high permeability of 19400 at 50 Hz under an AC field amplitude of 1.2 A/m, respectively. In addition, the ring-shaped bulk sample also shows low core loss of 0.09 W/kg at 50 Hz under induction of 0.5 T. The synthesis of ring-shaped bulk samples with good magnetic properties is encouraging for their potential applications as functional materials in the future.