Carbon and Microstructure Effects on the Magnetic Properties of Fe–CN Soft Magnetic Materials (Minnealloy)

  • Guannan GuoEmail author
  • Jinming Liu
  • Jian-Ping Wang
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


In this report, we investigated the effects of carbon and microstructure of the precursor on the magnetic performances based on a developed method for bulk preparation to synthesize Fe–CN (Minnealloy) soft magnetic materials. The melt-spun ribbons of Fe1−xCx were obtained to improve the efficiency of the nitrogen diffusivity by introducing porous and defects inside the grains, which increases the volume fraction of α″-Fe16N2 phase. The carbon effects were studied by the X-ray diffraction (XRD) and Wavelength-dispersive spectroscopy (WDS) to reveal the redistribution of carbon during the thermal treatment and its effects on nitridation. The microstructure variation during the thermal treatment for the Fe–C precursor was observed, which could be explained by the formation of non-uniform porous structure during the oxidation and reduction steps and also the migration of the carbon atoms.


Soft magnetic materials Minnealloy Fe–CN Fe16N2 Low-temperature nitridation 


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© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  1. 1.Department of Electrical and Computer EngineeringUniversity of MinnesotaMinneapolisUSA

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