Study of Structure and Magnetic Properties of SmCo 10 Alloy Prepared by Different Methods

  • Chi X
  • Li Y
  • Er D
  • et al.
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Abstract

In this paper, the phase compositions, microstructures, atomic structures, and magnetic properties of Co-rich SmCo 10 alloys prepared by arc-melting, annealing, and melt-spinning were studied. It was found that as-cast alloy is composed of Th 2 Zn 17 -type Sm 2 Co 17 matrix with an average grain size of ∼45 μ m accompanied by lamellar eutecticum (consisting of α-Co and Th 2 Zn 17 -type Sm 2 Co 17 ) distributed at grain boundaries. The annealed alloy has the same phase composition and phase distribution as the as-cast alloy except that the average grain size decreases to ∼35 μ m, and the eutecticum has more homogeneous distribution on the matrix. Simultaneously, the atomic structure of Sm 2 Co 17 is unchanged with only a decrease in structural disorder after annealing. The as-spun ribbons are composed of ∼95.5 vol.% TbCu 7 -type Sm 2 Co 17 and the rest α-Co. The short rod-shaped α-Co grains are intermittently distributed at the grain boundaries of equiaxed Sm 2 Co 17 grains. The as-spun ribbons show a higher coercivity, and the annealed alloy shows maximum magnetization. The structural parameters were calculated by Extended X-ray Absorption Fine Structure (EXAFS), and the relationship between structure and magnetic properties was discussed in detail.

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Chi, X., Li, Y., Er, D., Han, X., Duan, X., Sun, J., & Cui, C. (2018). Study of Structure and Magnetic Properties of SmCo 10 Alloy Prepared by Different Methods . Advances in Materials Science and Engineering, 2018, 1–10. https://doi.org/10.1155/2018/6457534

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