Magnetization reversal processes in sintered permanent magnets Sm(Co, Fe, Zr, Cu)Z

Urzhumtsev, A. N.; Maltseva, V. E.; Волегов, А. С.

doi:10.1016/j.jmmm.2022.169143

Cited by 10 publications

(1 citation statement)

References 35 publications

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“…Sm-Co-based permanent magnets have been used in aerospace, electric vehicle motors, wind turbines, sensors and actuators because of high Curie temperatures, excellent temperature stability and good corrosion resistance [1][2][3]. Extensive investigations were conducted to investigate the magnetic properties of Sm-Co alloys with alloying elements Fe, Cu and Zr, which results in a new class of Sm(Co, Fe, Cu, Zr) z (5 ≤ Z ≤ 8.5) permanent magnets [4][5][6][7][8][9][10][11]. It was reported that the addition of Cu into Sm-Co-based permanent magnets would improve their coercivity (H cj ) [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu Substitution and Heat Treatment on Phase Formation and Magnetic Properties of Sm12Co88−xCux Melt-Spun Ribbons

Dai

Luo

et al. 2022

Materials

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The phase structure and microstructure of Sm12Co88−xCux (x = 0, 2, 4, 6, 8, 10; at.%) as-cast alloys and melt-spun ribbons prepared via the arc-melting method and melt-spun technology were studied experimentally by X-ray diffraction (XRD) and scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS). The results reveal that the Sm12Co88−xCux (x = 0) as-cast alloy contains Sm2Co17 and Sm5Co19 phases, while the Sm12Co88−xCux (x = 2) as-cast alloy is composed of Sm2Co17, Sm2Co7 and Sm(Co, Cu)5 phases. Sm2Co17 and Sm(Co, Cu)5 phases are detected in Sm12Co88−xCux (x = 4, 6, 8, 10) as-cast alloys. Meanwhile, Sm12Co88−xCux ribbons show a single SmCo7 phase, which is still formed in the ribbons annealed at 1023 K for one hour. After annealed at 1123 K for two hours, cooled slowly down to 673 K at 0.5 K/min and then kept for four hours, the ribbons are composed of Sm2Co17 and Sm(Co, Cu)5 phases. The magnetic measurements of Sm12Co88−xCux ribbons were performed by vibrating sample magnetometer (VSM). The results exhibit that the maximum magnetic energy product ((BH)max), the coercivity (Hcj) and the remanence (Br) of the Sm12Co88−xCux ribbons increase generally with the increase in Cu substitution. In particular, the magnetic properties of the ribbons annealed at 1123 K and 673 K increase significantly with the increase in Cu substitution, resulting from the increase in the volume fraction of the formed Sm(Co, Cu)5 phase after heat treatment.

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