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Structural Analysis and Magnetic Properties of FeCo Alloys Obtained by Mechanical Alloying

F. Sánchez-De Jesús, A. M. Bolarín-Miró

2016esmagnetic propertiesmechanical alloyingFeCo alloysstructural analysis

Abstract

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A systematic study on the structural and magnetic properties of Fe100−xCox alloys (10<x<90, Δx=10 in wt. percent) obtained by mechanical alloying is presented. Elemental powders of Fe and Co mixed in an adequate weight ratio were milled at room temperature in a shaker mixer mill using vials and balls of hardened steel as milling media with a ball: powder weight ratio of 12:1. The mixtures were milled for 3 hours. The results show that, after milling, for almost all compositions (up to x=60), solid solutions based on bcc structures were obtained. For Co-rich alloys (x≥70), different phases were found, revealing the formation of a metastable intermetallic phase (FeCo, wairauite) together with fcc-Co and hcp-Co phases. The specific saturation magnetization increases with increasing Co content, reaching a maximum value of 225 emu/g for hcp-Fe70Co30, and then it diminishes to 15 emu/g for bcc-Fe30Co70. All studied alloys (Fe100−xCox) present low coercivity, in the range from 0 to 65 Oe, which is lower than reported. The coercivity increases with the increment in Co, reaching a maximum of 6.1 Oe for Fe40Co60. After that, the coercivity falls to 2.

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@article{2afde723-4892-490e-9ce0-f8cdfde8daf1,
  title={Structural Analysis and Magnetic Properties of FeCo Alloys Obtained by Mechanical Alloying},
  author={F. Sánchez-De Jesús and A. M. Bolarín-Miró},
  year={2016},
  language={es}
}
TY  - JOUR
TI  - Structural Analysis and Magnetic Properties of FeCo Alloys Obtained by Mechanical Alloying
AU  - F. Sánchez-De Jesús
AU  - A. M. Bolarín-Miró
PY  - 2016
LA  - es
ER  -

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