The influence of fabrication conditions on structure and magnetic properties of Nd–Fe–Co–Nb–B nanocomposites
Nguyen, Hai Yen; Nguyen, Thi Thanh Huyen; Pham, Thi Thanh; Do, Tran Huu; Nguyen, Huy Dan; Nguyen, Hai Yen; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam; Nguyen, Thi Thanh Huyen; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam; Quang Ninh University of Industry, Dong Trieu, Quang Ninh, Vietnam; Pham, Thi Thanh; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam; Do, Tran Huu; Hanoi University of Technology, 1 Dai Co Viet, Hanoi, Vietnam; Nguyen, Huy Dan; Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Hanoi, Vietnam
Журнал:
Advances in Natural Sciences: Nanoscience and Nanotechnology
Дата:
2011-03-01
Аннотация:
In this paper, we present the results of an investigation of the influence of fabrication conditions on the structure and magnetic properties of Nd<sub>10.5−x</sub>Fe<sub>83.5−y</sub>Co<sub>x</sub>Nb<sub>y</sub>B<sub>6</sub> (x=0–6; y=1.5–3) nanocomposites prepared by melt-spinning combined with annealing. By changing the quenching rate (by varying the tangential velocity of the copper wheel from 10 m s<sup>−1</sup> to 40 m s<sup>−1</sup>), one can select a suitable velocity to obtain an alloy that has good, hard magnetic behavior without annealing. However, the hard magnetic behavior of the alloy is better and more stable when the alloy is quenched at a high rate to create an amorphous state and subsequently annealed in the range of 650–800 °C for 10 min. The results also show that the Co concentration has an important effect on the structure and magnetic properties of the alloys.
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