Permanent magnetic powder of cobalt rare - earth metal compound

摘要

Particles of the compound are contacted with a metal, from the Zn and As group, in an inert atm. and at a temp. at which the latter metal is not solid. Spec. the compound is Co5Y, Co5Sm or Co5M, where M is Misch-metall rich in Ce, and the inert atmos. is H or He.