Microstructure and Magnetic Properties of Bulk FeCo Alloys Fabricated from Mechanically Alloying and Chemically Synthesized Powders

  • V. A. Bautin
  • S. A. Gudoshnikov
  • A. G. Seferyan
  • N. A. Usov
Original Paper
First Online:
Received:
Accepted:

Abstract

Three different methods of fabrication of FeCo soft magnetic material using ferromagnetic powders are compared: (i) simple sintering of elemental powders of Fe and Co, (ii) sintering of mechanically alloying FeCo powder, and (iii) sintering of chemically synthesized FeCo powder. The microstructure of ferromagnetic powders and bulk sintered alloys is characterized using scanning electron microscopy and energy-dispersive X-ray spectroscopy analysis. The best magnetic properties with high saturation magnetization, M s = 211.3 emu/g, are obtained for bulk FeCo alloy sintered from chemically synthesized powder. It consists of nearly spherical FeCo particles with diameters from 5 to 15 μ m. The mean particle size of chemically synthesized FeCo powder can be controlled by changing the melt composition, temperature, and process duration. The relatively large size of FeCo particles reduces the influence of surface oxidation on the particle magnetic properties. The low-cost chemical technology developed is promising for a large-scale production of small FeCo magnetic components of arbitrary shapes with high-dimensional precision.

Keywords

FeCo powder Mechanical alloying Chemical synthesis Magnetic properties 
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Notes

Acknowledgments

We acknowledge the funding from the Russian Ministry of Education and Science (Grant RFMEFI57815X0128).

Compliance with Ethical Standards

Conflict of interests

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.National University of Science and Technology “MISiS”MoscowRussia
  2. 2.Pushkov Institute of Terrestrial MagnetismIonosphere and Radio Wave Propagation, Russian Academy of Sciences IZMIRAN TroitskMoscowRussia

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