Research on Magnetic Property of Nd2Fe14B/α-Fe Nanocomposite Under Different Roller Speeds

Nano-composite permanent magnetic material is a new type permanent magnetic material, and it is the synthesis of soft and hard magnetic phase within nanoscale. On the basis of exchange coupling hard magnetizing theory, nano-composite permanent magnetic material can at the same time have high residual magnetization intensity of soft magnetic phase and high coerccivity of hard magnetic phase, and is expected to develop into new generation high performance permanent magnetic material. Nevertheless, magnetic energy product of nano-composite permanent deriving from experiment differs greatly from theoretic value, and this is mainly due to fairly great difference between microstructure of material and theoretical model. In this paper, the constituent is taken as (Nd, Pr, Dy)2(Fe, Nb)14B/α-Fe, the fusant rapid quenching method is adopted to research the impact of different roller speeds to magnetic property, through result of VSM, XRD and SPM, magnetic property, phase composition and micro structure of alloy are analyzed.