High hard magnetic properties and cellular structure of nanocomposite magnet Nd4.5Fe73.8B18.5Cr0.5Co1.5Nb1Cu0.2
N.D. The N. Chau N.V. Vuong N.H. Quyen The formation of special nanostructure, cellular structure, in Nd4.5Fe73.8B18.5Cr0.5Co1.5Nb1Cu0.2 nanocomposite magnet has been observed by means of SEM for the first time. Ultrafine structure of cellules with thickness of 20-25 nm and length in range of 200-300 nm leads to high shape anisotropy of the materials. Therefore, high hard magnetic properties were obtained with (BH)(max) up to 17.3 MG Oe in ribbons with very high remanence of 13.5 kG. The role of Cr and Co in the formation and refinement of cellular structure is proposed. Effect of heat treatment on hard magnetic properties is discussed in detail. Chi tiết xin mời tham khảo tại http://repository.vnu.edu.vn/handle/VNU_123/31661 Title: High hard magnetic properties and cellular structure of nanocomposite magnet Nd4.5Fe73.8B18.5Cr0.5Co1.5Nb1Cu0.2 Authors: N.D. The N. Chau N.V. Vuong N.H. Quyen Keywords: Amorphous alloys;Nanocrystalline alloys;Ex...