Y-doped AlCoCrFeNi2.1 eutectic high-entropy alloy with excellent oxidation resistance and structure stability at 1000°C and 1100°C

Jie Lu, Han Zhang, Ying Chen, Ling Li, Xuanzhen Liu, Weiwei Xiao, Na Ni, Xiaofeng Zhao, Fangwei Guo, Ping Xiao

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Abstract

In this study, the oxidation behavior of AlCoCrFeNi2.1 eutectic high entropy alloy (EHEA) with/without Y doping at 1000 °C and 1100 °C was reported. The doping of minor Y is crucial to improving the Al2O3 scale adhesion and achieving its durability at high temperatures. The oxidation rates of Y-doped AlCoCrFeNi2.1 EHEA at 1000 °C and 1100 °C are comparable and even lower compared with conventional Al2O3-forming NiCoCrAlY/CoNiCrAlY alloys. The superior oxidation resistance and highly stable eutectic lamellar structure after high-temperature oxidation make Y-doped AlCoCrFeNi2.1 EHEA show a tremendous potential in high-temperature application.
Original languageEnglish
Pages (from-to)109191
JournalCorrosion Science
Volume180
Early online date14 Dec 2020
DOIs
Publication statusPublished - 1 Mar 2021

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