New Fe based soft magnetic amorphous alloys with high saturation magnetization and good corrosion resistance for dust core application
Abstract Fe rich amorphous dust core alloys with minor addition of Mo and/or Cr were synthesized because of the industrial request of mass production of high efficient low core loss Fe based dust cores. It was found that the present Fe (Cr, Mo) P B Si (C) amorphous alloy ribbons exhibit good soft magnetic properties of above 1.5 T for saturation magnetization, below 10 A/m for coercivity and rather good corrosion resistance in 3%NaCl aqueous solution. Besides, the amorphous alloy ribbons exhibit good bending ductility in as spun and optimally annealed states. It is noticed that these characteristics are much superior to those for commercial Fe Cr Nb P B Si soft magnetic dust core alloy (SENNTIX) In addition, the annealing treatment was noticed to cause the improvement of corrosion resistance without detriment to bending ductility. The new Fe based soft magnetic alloys with good combined characteristics are expected to be used as the basic material as high efficient soft magnetic dust cores in a high frequency range.