Effect of Mini Ga Doping in Nanocrystalline Nd4.5(Fe,Co)77.5B18 Magnet on Coercivity
The microstructure and the coercivity of nanocomposite Nd4.5Fe76.5-xGaxCo1.0B18 (x=0~0.6at%)bonded magnets were studied. The results showed that addition of small amount of Ga in Nd4.5Fe76.5-xGaxCo1.0B18 made the grains finer and more uniform. A notable peak of coercivity was observed in the variational curve of coercivity with annealing time when Ga content was low (x=0.2). This phenomenon could be explained by the microstructure and the exchange coupling interaction of two-phase nanocomposite.
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
M. Zhu et al., "Effect of Mini Ga Doping in Nanocrystalline Nd4.5(Fe,Co)77.5B18 Magnet on Coercivity", Materials Science Forum, Vols. 475-479, pp. 2147-2150, 2005