Nitriding and martensitic phase transformation of the copper and boron doped iron nitride magnet

Md Mehedi, Yanfeng Jiang, Bin Ma, Jian Ping Wang

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

We have investigated two solid-state phase transformations-nitriding of the ternary alloy FeCuB ribbons and martensitic phase transformation in the FeCuBN ribbons using x-ray diffraction, Auger Electron spectroscopy, and scanning electron microscopy. We also studied the diffusion kinetics of nitrogen in FeCuB ribbons and found the activation energy of N to diffuse in the FeCuB matrix and the diffusion coefficient of N at different temperatures. We investigated the evolution of the microstructure during nitriding process and found a layered growth of iron nitride in the FeCuB matrix. Finally, the martensitic phase transformation of the FeCuBN ribbons was also optimized, and the optimizing parameters for the martensitic phase transformation of FeCuB ribbons were reported.

Original languageEnglish (US)
Pages (from-to)80-88
Number of pages9
JournalActa Materialia
Volume167
DOIs
StatePublished - Apr 1 2019

Keywords

  • Hard magnets
  • Iron nitride
  • Martensitic
  • Nitriding
  • Permanent magnets
  • Phase transformation
  • Rare-earth-free magnet

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