Phase formation and magnetic properties of (Nd1−xYx)14Fe80B6 melt-spun ribbons

Abstract

Phase formation and magnetic properties of (Nd _1−x Y _x ) _14 Fe _80 B _6 (x = 0.1–0.8) alloys were investigated experimentally by x-ray diffraction (XRD) and vibrating sample magnetometer (VSM). The phase structure analysis reveals that the as-cast (Nd _1−x Y _x ) _14 Fe _80 B _6 alloys were made of 2:14:1 phase with tetragonal Nd _2 Fe _14 B-tpyed structure, REFe _2 and α -Fe phases, while the melt-spun ribbons are composed of 2:14:1 phase and α -Fe Phase. Based on the magnetic measurements, the remanence (B _r ), the coercivity (H _cj ), the maximum magnetic energy product ((BH) _max ) and the Curie temperatures (T _c ) of (Nd _1−x Y _x ) _14 Fe _80 B _6 ribbons reduces gradually with increasing Y substitution. The relatively high coercivity (6.75 kOe) of (Nd _0.4 Y _0.6 ) _14 Fe _80 B _6 ribbon with high Y substitution was achieved, which indicates that good magnetic properties of Nd–Y–Fe–B ribbons would be obtained through the design of alloy composition and phase formation.

Keywords

• Nd–Y–Fe–B ribbons
• phase structure
• magnetic properties