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

W. Kai; F.P. Cheng; F.C. Chien; Y.R. Lin; D. Chen; J.J. Kai; C.T. Liu; C.J. Wang

doi:10.1016/j.corsci.2019.108093

The oxidation behavior of a Ni₂FeCoCrAl_0.5 high-entropy superalloy in O₂-containing environments

W. Kai^*, F.P. Cheng, F.C. Chien, Y.R. Lin, D. Chen, J.J. Kai, C.T. Liu, C.J. Wang

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

34 Citations (Scopus)

Abstract

The oxidation behavior of a Ni₂FeCoCrAl_0.5 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.

Original language	English
Article number	108093
Journal	Corrosion Science
Volume	158
Online published	16 Jul 2019
DOIs	https://doi.org/10.1016/j.corsci.2019.108093
Publication status	Published - Sept 2019

Research Keywords

Ni2FeCoCrAl0.5 high-entropy superalloy
Oxidation
Scales

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@article{1c12597498314a868ea4ea1a6d02c218,

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

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.",

keywords = "Ni2FeCoCrAl0.5 high-entropy superalloy, Oxidation, Scales",

author = "W. Kai and F.P. Cheng and F.C. Chien and Y.R. Lin and D. Chen and J.J. Kai and C.T. Liu and C.J. Wang",

year = "2019",

month = sep,

doi = "10.1016/j.corsci.2019.108093",

language = "English",

volume = "158",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - The oxidation behavior of a Ni2FeCoCrAl0.5 high-entropy superalloy in O2-containing environments

AU - Kai, W.

AU - Cheng, F.P.

AU - Chien, F.C.

AU - Lin, Y.R.

AU - Chen, D.

AU - Kai, J.J.

AU - Liu, C.T.

AU - Wang, C.J.

PY - 2019/9

Y1 - 2019/9

N2 - 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.

AB - 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.

KW - Ni2FeCoCrAl0.5 high-entropy superalloy

KW - Oxidation

KW - Scales

UR - http://www.scopus.com/inward/record.url?scp=85069582355&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85069582355&origin=recordpage

U2 - 10.1016/j.corsci.2019.108093

DO - 10.1016/j.corsci.2019.108093

M3 - RGC 21 - Publication in refereed journal

SN - 0010-938X

VL - 158

JO - Corrosion Science

JF - Corrosion Science

M1 - 108093

ER -