Structure and Magnetic Properties of Nd_9Fe_(74)B_(12)Ti_4C Rapidly Quenched Alloys Prepared by Melt Electrospinning Using Centrifuge Technique

摘要

The X-ray diffraction analysis and magnetometry methods were used to investigate the phase composition and magnetic properties of rapidly quenched Nd_9Fe_(74)B_(12)Ti_4C 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℃. 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℃ was discovered along and in the plane perpendicular to the planes of flakes (of a "fanlike" texture) during their magnetizing.