Journal
CORROSION SCIENCE
Volume 121, Issue -, Pages 116-125Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2017.02.008
Keywords
High-entropy alloys; Oxidation; Scales
Funding
- Ministry of Science and Technology of the Republic of China [MOST-103-2221-E-019-007-MY2]
- National Taiwan Ocean University [NTOU-AF94-04-03-01-01, NTOU-RD972-04-03-01]
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The oxidation of three quinary equimolar high-entropy alloys, containing FeCoNiCrAI, FeCoNiCrMn, and FeCoNiCrSi was studied in dry air at 700-900 degrees C. The Mn-containing alloy was single-phase, while both Al- and Si-containing alloys were dual-phase. The oxidation kinetics of all the alloys followed the parabolic rate law, regardless of temperature and alloy composition. The oxidation rates of both Al- and Si-containing alloys were lower than those of the quaternary FeCoNiCr alloy, while those of the Mn-containing alloy went to an opposite direction. Multiple scales formed on the alloys were strongly composition-dependent. (C) 2017 Published by Elsevier Ltd.
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