Structure and magnetic properties of Nd9Fe74B12Ti4C rapidly quenched alloys prepared by melt electrospinning using centrifuge technique

Abstract

The X-ray diffraction analysis and magnetometry methods were used to investigate the phase composition and magnetic properties of rapidly quenched Nd9Fe74B12Ti4C alloys. The rapidly quenched alloys were prepared by the spinning of the melt of a specified composition using a centrifuge technique with the use of electric current passing through an injected stream during quenching. The rapidly quenched alloys in the form of flakes (plane fragments of a metal ribbon) were subjected to short-term annealing in the temperature range between 550–1000°C. It was found that the alloy prepared with passage of an electric current contains a larger amount of amorphous phase than that prepared without passage of an electric current. This fact is reflected in the difference between the processes of their devitrification during short-term annealing. The anisotropy of hysteresis properties of flakes annealed at 720°C was discovered along and in the plane perpendicular to the planes of flakes (of a “fanlike” texture) during their magnetizing.