Effect of different wheel speed on magnetic properties of Nd8Fe85Mo1B6

The melt-spun ribbons of Nd8Fe85Mo1B6 have been prepared by directly rapid quenching at different wheel speeds. From the result of vibrating sample ma gnetometer measurement, we found that the magnetic properties of the ribbon s are dependent on the wheel speed. X-ray diffraction and thermomagnetic an alysis were also used to investigate microstructure and phase composition o f the samples. The result shows that the TbCu7 phase increases with increas ing wheel speed; at the same time, a decreased grain size of the alpha-Fe p hase is observed. The change of magnetic properties is due to the change of phase composition arid grain size of the samples.