Effect of chemically active media on the magnetic properties of rapidly quenched iron-based alloys: II. Morphology of electrically insulating coatings and magnetic properties of ribbons of amorphous soft magnetic alloys

Using the amorphous soft magnetic iron-based alloys Fe72Co8Si5B15 and Fe81B 13Si4C2 as a model object, the effect of the morphology of electrically ins ulating coatings (EICs) deposited by the suspended-ceramics method and of t he conditions of their formation on the magnetic properties of a ribbon wer e investigated. The effect of EICs was shown to be caused by the chemical i nteraction of the coating and water contained in it with the ribbon surface . The generation of pseudouniaxial stresses in the ribbon plane can be sati sfactorily explained in terms of the model of anisotropic incorporation of the elements of the coating into the surface layer of the ribbon, as well a s of anisotropic oxidation and hydrogenation of the ribbon surface.