抄録
In melt-supun ribbon of (Pr, Dy)-(Fe, Co)-B system alloys prepared by the single roller method, the effects of composition, substrate surface velocity on the magnetic properties were studied, and their bonded magnets were made of the optimum-quenched ribbons for Pr15Fe77B8, Pr15(Fe0.9Co0.1)77B8, and (Pr0.95Dy0.05)15(Fe0.9Co0.1)77B8 alloys.
Values of a maximum energy product in Pr15Fe77B8, Pr15(Fe0.9Co0.1)7777B8 and (Pr0.95Dy0.05)15(Fe0.9 Co0.1)77B8 ribbons prepared at a substrate surface velocity of 11.8 m/s were obtained 98.3 kJ/m3, 97.4 kJ/m3 and 97.8 kJ/m3 respectively. X-ray diffraction patterns from ribbons show a mixture of an amorphous and a fine crystaline phase.
The best magnetic property obtained for these bonded magnets was (BH)max=64.8 kJ/m3 in Pr15Fe77B8 composition.
It was known that the temperature coefficients of Br and HCB were improved by Co substitution for Fe and Dy for Pr.
