The oxidation behavior of a ductile Hf0.5Nb0.5Ta0.5Ti1.5Zr refractory high-entropy alloy in pure oxygen condition at 500–900 °C

Y.Z. Wang; N. Gao; X.W. Liu; W.M. Chen; H.T. Zheng

Journal of Materials Research and Technology (Jul 2023)

The oxidation behavior of a ductile Hf0.5Nb0.5Ta0.5Ti1.5Zr refractory high-entropy alloy in pure oxygen condition at 500–900 °C

Y.Z. Wang,
N. Gao,
X.W. Liu,
W.M. Chen,
H.T. Zheng

Affiliations

Y.Z. Wang: Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou, 510632, China
N. Gao: State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
X.W. Liu: State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China
W.M. Chen: Institute of Advanced Wear & Corrosion Resistance and Functional Materials, Jinan University, Guangzhou, 510632, China; Corresponding author.
H.T. Zheng: National Engineering Research Center of Near-net Shape Forming for Metallic Materials, South China University of Technology, Guangzhou, 510632, China; Corresponding author.

Journal volume & issue: Vol. 25
pp. 5457 – 5468

Abstract

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In this study, the oxidation behavior of Hf0.5Nb0.5Ta0.5Ti1.5Zr refractory high-entropy alloy (RHEA) was investigated at temperature range of 500–900 °C in pure oxygen condition, and the oxidation mechanism was systemically discussed. The oxidation kinetics curve shows linear lines with the initially slow and subsequently faster oxidation rate at 700 °C. As the oxidation temperature increased to 800 °C, the oxidation curve comprises three stages: beginning linear lines, intermediate breakaway platform and final parabola. In addition, the oxidation kinetics curves exhibit near parabolic in all the studied temperature. The oxygen diffusion was considered as the predominant mechanism in the oxidation of RHEA.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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