Preparation of FeCo-, FeNi- and NiCo-alloy coated cenosphere composites by heterogeneous precipitation--颗粒学报PARTICUOLOGY

Meng, X., & Shen, X. (2012). Preparation of FeCo-, FeNi- and NiCo-alloy coated cenosphere composites by heterogeneous precipitation. Particuology, 10(3), 334–338. https://doi.org/10.1016/j.partic.2011.02.012

Preparation of FeCo-, FeNi- and NiCo-alloy coated cenosphere composites by heterogeneous precipitation

Xianfeng Meng^*, Xiangqian Shen

School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

10.1016/j.partic.2011.02.012

Volume 10, Issue 3, June 2012, Pages 334-338

Received 5 December 2010, Revised 28 January 2011, Accepted 21 February 2011, Available online 1 November 2011.

E-mail: mxf2029@ujs.edu.cn

Highlights

Abstract

Precursors of binary alloy (Fe_1/2Co_1/2, Fe_1/2Ni_1/2, Ni_1/2Co_1/2, hereinafter referred to as FeCo, FeNi, NiCo) coated cenospheres were prepared by heterogeneous precipitation under optimized conditions. Magnetic binary alloy coated cenosphere composites with core–shell structure were subsequently obtained by thermal reduction of the as-prepared precursors at 700 °C for 2 h under H₂/N₂ atmosphere. The results showed that the alloy coatings were uniform and the binary alloy coated cenosphere composites basically retained the spherical morphology, suggesting that the thickness of the alloy coating could be adjusted to fabricate core–shell composites with multilayer structures. The composites exhibited higher coercivity than the pure alloy powders, and could therefore be used for high-performance functional materials and devices.

Graphical abstract

Keywords

Coating materials; Heterogeneous precipitation; Binary alloy; Core shell structure; Magnetic property

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