MAGNETIC PROPERTIES OF MELT-SPUN (Pr, Dy)-(Fe, Co)-B SYSTEM ALLOYS AND THEIR BONDED MAGNETS.

In melt-spun ribbon of (Pr,Dy)-(Fe,Co)-B alloys prepared by the single roller method, the effects of composition and substrate surface velocity on the magnetic properties were studied. Bonded magnets were made of Pr//1//5Fe//7//7B//8, Pr//1//5(Fe//0//. //9Co//0//. //1)//7//7B//8, and (Pr//0//. //9//5Dy//0//. //0//5)//1//5(Fe//0//. //9Co//0//. //1)//7 Values of a maximum energy product in Pr//1//5Fe//7//7B//8, Pr//1//5(Fe//0//. //9Co//0//. //1)//7//7B//8 and (Pr//0//. //9//5Dy//0//. //0//5)//1//5(Fe//0//. //9Co//0//. //1)//7 prepared at a substrate surface velocity of 11. 8 m/s were 98. 3 kJ/m**3, 97. 4 kJ/m**3 and 97. 8 kJ/m**3 respectively. The best magnetic property obtained was (BH)//m//a//x equals 64. 8 kJ/m**3 in Pr//1//5Fe//7//7B//8. The temperature coefficients of B//r and H//C//B were improved by Co substitution for Fe and Dy for Pr.