Effect of Wheel Speed on Magnetic Properties of Nd10Fe85−xCoxB5 (x = 0 to 40) Nanocomposite Ribbons

• Published in: Journal of electronic materials Vol. 49; no. 6; pp. 3902 - 3906
• Main Authors: Van, H. T., Vinh, N. D., Ca, N. X., Truong, N. X., Oanh, V. T. K., Hai, P. V., Hien, N. T., Khien, N. V.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2020; Springer Nature B.V
• Subjects: Braking systems; Characterization and Evaluation of Materials; Chemistry and Materials Science; Cobalt; Electronics and Microelectronics; Instrumentation; Iron; Magnetic properties; Magnetism; Materials Science; Melt spinning; Nanocomposites; Optical and Electronic Materials; Solid State Physics; as-spun ribbons; magnetic properties; nanocomposite ribbons; energy product; annealed ribbons; Substitution of Fe by Co
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-020-08112-y

Nd 2 Fe 14 B/Fe(Co) nanocomposite ribbons were successfully fabricated by the melt-spinning technique. Nd 10 Fe 85− x Co x B 5 ( x  = 0, 10, 20, 30, and 40) prealloys were used as starting materials, and the wheel speed was varied from 10 m/s to 20 m/s. The effects of substitution of Fe by Co and the wheel speed were investigated to enable direct preparation of high-performance nanocomposite ribbons. It was found that the optimal wheel speed depended on the Co content in the ribbons. The highest energy product ( BH ) max of the as-spun ribbons reached 144.3 kJ/m 3 when using the optimal speed of 16 m/s for Nd 10 Fe 65 Co 20 B 5 . By annealing the ribbons at 873 K and 973 K for 30 min, the magnetic properties of the Nd 10 Fe 65 Co 20 B 5 nanocomposite ribbons obtained at a speed of 20 m/s were significantly improved. The microstructure and magnetic properties of the prepared ribbons are discussed in detail.