Reduced Remanence to Coercivity Increase Ratio of Pr11,76xDyxFe82B6 (x = 0; 1; 2; 3) Permanent Magnets

Abstract

Abstract Dysprosium substituted Pr-Fe-B permanent magnet samples with Pr11, 76-xDyxFe82B6 (x = 0, 1, 2 and 3) composition were made up by compacting the crystalline fine powders prepared through mechanical milling and successive high power ultrasonic irradiation. The (Pr,Dy)-Fe-B alloys with designated compositions were obtained from arc melted the charges that consisted of respectively Dy-Fe, Fe3B alloys and pure Fe and Pr metals. Results of the xrd analysis are permanent magnetic samples confirmed that the mass of the compound fraction formed is 90.07%. A change in lattice parameter of Pr2Fe14B phase occurred when Pr was partially substituted by Dy. Furthermore, the effect of dy partial substitution on magnetic properties can increase the coercivity value, but with a decrease in saturation magnetic. Dy = 3 substitution produces coercivity and remanence values of 160 kA/m and 0.275 T respectively in the permanent magnet category.