Study of the formation of crystal texture in α-Fe/Nd_2Fe_(14)B nanocomposite magnets prepared by controlled melt-spinning

摘要

For further improving the magnetic properties of nanocomposite magnets, the study of the formation of crystal textures in the hard magnetic phase is of great significance. In the present study, a strong (00l) crystal texture with the c-axis perpendicular to the ribbon plane was obtained in Nd_2Fe_(14)B nanocrystals in the α-Fe/Nd_2Fe_(14)B nanocomposite magnets prepared by the controlled melt-spinning of NdPrFeCoB. The intensity of the texture weakens from the free surface layer of the ribbon to the layer attached with the wheel. The oriented Nd_2Fe_(14)B crystals have a fine equiaxed characteristic, d = 36 nm, in the layer attached with the wheel and a coarse columnar characteristic, d = 69 nm, in the layer near the free surface. The formation of the crystal texture in the Nd_2Fe_(14)B nanocrystals is attributed to a large temperature gradient normal to the ribbon plane during the melt-spinning process.