The oxidation behavior of a Ni2FeCoCrAl0.5 high-entropy superalloy in O2-containing environments

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • W. Kai
  • F.P. Cheng
  • F.C. Chien
  • Y.R. Lin
  • C.J. Wang

Detail(s)

Original languageEnglish
Article number108093
Journal / PublicationCorrosion Science
Volume158
Online published16 Jul 2019
Publication statusPublished - Sep 2019

Abstract

The oxidation behavior of a Ni2FeCoCrAl0.5 high-entropy superalloy was studied at 900 °C in O2-containing environments over the oxygen pressure range of 10 - 1.0 × 105 Pa. The superalloy oxidized parabolically at PO2 ≤ 2.1 × 104 Pa, having its oxidation rates increasing with increasing oxygen pressure. An exclusive α-Al2O3 layer formed on the alloy with its thickness increased with oxygen pressure. On the contrast, a mass-lost kinetics was observed and heterophasic scales of intermixed α-Al2O3, Cr2O3, and M-Cr spinels (M = Ni, Fe, or Co) were detected at PO2 = 1.0 × 105 Pa.

Research Area(s)

  • Ni2FeCoCrAl0.5 high-entropy superalloy, Oxidation, Scales

Citation Format(s)

The oxidation behavior of a Ni2FeCoCrAl0.5 high-entropy superalloy in O2-containing environments. / Kai, W.; Cheng, F.P.; Chien, F.C.; Lin, Y.R.; Chen, D.; Kai, J.J.; Liu, C.T.; Wang, C.J.

In: Corrosion Science, Vol. 158, 108093, 09.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review