Abstract
Microstructure and magnetic properties of melt-spun nanocomposite magnets with nominal compositions of (Nd 1− x Pr x ) 9Fe 86B 5 ( x=0–1) were investigated. Substitution of Nd by Pr could significantly improve the hard magnetic properties of the nanocomposite magnets; the intrinsic coercivity ( i H c) and the maximum magnetic energy product (( BH) max) increase from 414 kA/m and 124 kJ/m 3 for x=0 to 493 kA/m and 152 kJ/m 3 for x=0.6, respectively. Further substituting Nd by Pr ( x>0.6) strongly weakens exchange-coupling interaction between magnetically hard and soft phases.
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