The oxidation behavior of Ni2FeCoCrAlx high-entropy alloys in dry air

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Author(s)

  • W. Kai
  • F.P. Cheng
  • Y.R. Lin
  • C.W. Chuang
  • R.T. Huang
  • C.J. Wang

Detail(s)

Original languageEnglish
Article number155518
Journal / PublicationJournal of Alloys and Compounds
Volume836
Online published11 May 2020
Publication statusPublished - 25 Sep 2020

Abstract

The oxidation behavior of three Ni2FeCoCrAlx high-entropy alloys (where x = 0, 0.5, and 1.0) was studied at 600–900 °C in dry air. The oxidation kinetics of all the alloys obeyed the parabolic rate law at T ≥ 700 °C, with their oxidation rates steadily increasing with either increasing temperature or decreasing Al content. Discontinuous oxide particles grew on the alloys at 600 °C, while multiple layered scales and an exclusive Al2O3 layer formed on the Al-free and the Al-containing alloys, respectively at T ≥ 700 °C. In addition, an internal nitrogen attack to form AlN was also observed for the Al-containing alloys at 900 °C.

Research Area(s)

  • High-entropy superalloys, Scales, SEM, TEM

Citation Format(s)

The oxidation behavior of Ni2FeCoCrAlx high-entropy alloys in dry air. / Kai, W.; Cheng, F.P.; Lin, Y.R.; Chuang, C.W.; Huang, R.T.; Chen, D.; Kai, J.J.; Liu, C.T.; Wang, C.J.

In: Journal of Alloys and Compounds, Vol. 836, 155518, 25.09.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal