Microstructure and magnetic properties of (Fe 100-xCo x) 84.5Nb 5B 8.5P 2 alloys

S. N. Kane, S. Tripathi, M. Coisson, E. S. Olivetti, P. Tiberto, F. Vinai, M. Baricco, G. Fiore, A. Apolinário, C. T. Sousa, J. P. Araujo, L. K. Varga

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Partial substitution of Fe with Co in gradually devitrified Si-free Nanoperm-type alloys improves their soft magnetic properties, increases the Curie temperature of the amorphous matrix, and allows casting in air. In the present work we report the temperature dependence of structural and magnetic properties of (Fe 100-xCo x) 84.5Nb 5B 8.5P 2 (x = 20, 40, 60) alloys using differential scanning calorimetry, magnetic, thermo-magnetic and X-ray diffraction measurements, to get complementary information on the microstructure, composition of the precipitated crystalline phase and their correlation with magnetic properties. Higher Co concentrations improve the magnetic softness of the alloy, whose properties can be further optimized by suitable thermal treatments. Magnetic data is discussed in terms of the precipitation of a Fe-Co crystalline phase consisting of different Co content.

Original languageEnglish
Pages (from-to)S337-S341
JournalJournal of Alloys and Compounds
Issue numberSUPPL.1
Publication statusPublished - Sep 25 2012



  • Amorphous to nanocrystalline transformation
  • Si-free magnetic materials
  • Thermal treatments

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Kane, S. N., Tripathi, S., Coisson, M., Olivetti, E. S., Tiberto, P., Vinai, F., Baricco, M., Fiore, G., Apolinário, A., Sousa, C. T., Araujo, J. P., & Varga, L. K. (2012). Microstructure and magnetic properties of (Fe 100-xCo x) 84.5Nb 5B 8.5P 2 alloys. Journal of Alloys and Compounds, 536(SUPPL.1), S337-S341. https://doi.org/10.1016/j.jallcom.2011.11.110