Plasma-nitriding and characterization of FeAl40 iron aluminide

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Abstract

The response to plasma-nitriding of a B2 FeAl40 aluminide was investigated in this work using varying temperatures, times and gas mixtures. The microstructure of the plasma-nitrided cases were fully characterized using glow discharge optical emission spectroscopy, scanning electron microscopy/energy-dispersive X-ray spectroscopy, X-ray diffraction and transmission electron microscopy, as well as microhardness testing. Based on the experimental results, the observed abnormal growth kinetics of the nitride case formed at 700 °C was investigated and a model was put forward to understand the mechanism involved in the formation of wave-like line features within the nitride cases.
Original languageEnglish
Pages (from-to)341-351
JournalActa Materialia
Volume86
Early online date14 Jan 2015
DOIs
Publication statusPublished - 1 Mar 2015

Keywords

  • Plasma-nitriding
  • Iron aluminide
  • Aluminium nitride

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