Magnetic properties of melt-spun Sm/sub 10/(Fe,V)/sub 90/N/sub y/ with TbCu/sub 7/-type structure

摘要

Vanadium substituted Sm/sub 10/(Fe,V)/sub 90/ alloys were prepared by a single roller rapid-quenching method. The melt-spun Sm/sub 10/Fe/sub 82.5/V/sub 7.5/ alloy showed the TbCu/sub 7/-type structure for a wide range of wheel speeds between 15 and 50 m/s, while the Sm/sub 10/Fe/sub 90/ binary alloy showed the same structure at wheel speeds over 45 m/s. It was found that the substitution of vanadium for iron in Sm/sub 10/(Fe,V)/sub 90/ alloys gives a greater range of stability of the TbCu/sub 7/-type structure. Nitrogenation was carried out by heating alloy powders in nitrogen gas. The magnetic properties of Sm/sub 10/Fe/sub 82.5/V/sub 7.5/N/sub /spl nu// powder nitrogenated at 773 K for 6 h were: J/sub r/=0.71 T, H/sub cJ/=535 kA/m (6.7 kOe), and (BH)/sub max/=63.7 kJm/sup 3/.ETX