Abstract
Pr-Co binary ribbons with 11.1∼17.3 at% Pr were produced by rapid quenching techniques. The samples were melted and quenched in Ar gas atmosphere to avoid oxidation. A maximum coercivity of about 10 kOe was obtained for 17.3 at% Pr-Co ribbons (approximately the stoichiometric content of PrCo5), which was twice the value of sintered PrCo5 magnets. Oxygen content of these ribbons was 300∼500 ppm (by weight), less than about 1/10 the content of sintered magnets. These 17.3 at% Pr-Co ribbons were magnetically and chemically stable under atmospheric conditions for a 30 month period.
