Investigation for low-cost permanent magnets

This work focused on the search for materials and processing techniques that provide the potential of low-cost, high performance permanent magnets. The principal processing method was rapid solidification and annealing. Crystallized amorphus alloys of Fe, Co, Ni and glass formers exhibited coercivities of several hundred oerstads. A coercive force, H sub ci, of 960 Oe was attained in Fe65V15P10B10 and 3,200 Oe in Cu15Co60Si15B10. Alloys containing Pr or Nd with Fe and B exhibited very high H sub ci (over 20,000 Oe). These alloys are particularly attractive because of their high coercivity and magnetization, the absence of Co, and the relatively low content of the abund light rare earths.