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Advances in Materials Science and Engineering
Volume 2018, Article ID 6457534, 10 pages
https://doi.org/10.1155/2018/6457534
Research Article

Study of Structure and Magnetic Properties of SmCo10 Alloy Prepared by Different Methods

1Key Laboratory for New Type of Functional Materials in Hebei Province, Hebei University of Technology, No. 1 Dingzigu Road, Hongqiao District, Tianjin 300130, China
2University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA 19104, USA

Correspondence should be addressed to Ji-bing Sun; moc.621@bjsdgbh

Received 11 November 2017; Revised 7 January 2018; Accepted 7 February 2018; Published 29 March 2018

Academic Editor: Peter Majewski

Copyright © 2018 Xiang Chi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this paper, the phase compositions, microstructures, atomic structures, and magnetic properties of Co-rich SmCo10 alloys prepared by arc-melting, annealing, and melt-spinning were studied. It was found that as-cast alloy is composed of Th2Zn17-type Sm2Co17 matrix with an average grain size of ∼45 m accompanied by lamellar eutecticum (consisting of α-Co and Th2Zn17-type Sm2Co17) 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 m, and the eutecticum has more homogeneous distribution on the matrix. Simultaneously, the atomic structure of Sm2Co17 is unchanged with only a decrease in structural disorder after annealing. The as-spun ribbons are composed of ∼95.5 vol.% TbCu7-type Sm2Co17 and the rest α-Co. The short rod-shaped α-Co grains are intermittently distributed at the grain boundaries of equiaxed Sm2Co17 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.