热处理对 Al0.75CoCr1.25FeNi 高熵合金微观结构和耐腐蚀性的影响

IF 2.6 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals Pub Date : 2024-09-04 DOI:10.3390/met14091010

Jianyang Han, Huan Zhang, Hongtao Yuan, Xiaoru Zhuo, Xiang Cai, Yanxin Qiao

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引用次数: 0

摘要

在这项工作中，对铸造的 Al0.75CoCr1.25FeNi高熵合金（HEAs）进行了三种不同温度（600 ℃、800 ℃ 和 1000 ℃）的热处理，以研究热处理对其腐蚀性能的影响。开路电位（OCP）和循环极化测试表明，经过 1000 ℃ 热处理的高熵合金具有优异的耐腐蚀性，腐蚀倾向和腐蚀电流密度都很低。电化学阻抗能谱（EIS）和恒电位极化分析表明，经过 1000 °C 热处理的 HEA 上存在一层优异的被动膜。X 射线光电子能谱（XPS）分析表明，在 1000 °C 热处理 HEA 的恒电位极化测试中形成的被动膜最耐腐蚀，因为它具有最高的 Al2O3/Al(OH)3 和 Cr2O3/Cr(OH)3 比率。

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Effect of Heat Treatment on the Microstructure and Corrosion Resistance of Al0.75CoCr1.25FeNi High-Entropy Alloys

In this work, heat treatment of three different temperatures (600 °C, 800 °C, and 1000 °C) was applied to as-cast Al0.75CoCr1.25FeNi high-entropy alloys (HEAs) to investigate the influence of heat treatment on their corrosion properties. Open circuit potential (OCP) and cyclic polarization tests reveal that the 1000 °C heat-treated HEA possesses excellent corrosion resistance, as indicated by the low corrosion tendency and corrosion current density. Electrochemical impedance spectroscopy (EIS) and potentiostatic polarization analyses imply the presence of a superior passive film on the 1000 °C heat-treated HEA. X-ray photoelectron spectroscopy (XPS) analysis demonstrates that the passive film formed on the 1000 °C heat-treated HEA during potentiostatic polarization tests is most corrosion-resistant since it possesses the highest ratio of Al2O3/Al(OH)3 and Cr2O3/Cr(OH)3.

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来源期刊

Metals MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

4.90

自引率

13.80%

发文量

1832

审稿时长

1.5 months

期刊介绍： Metals (ISSN 2075-4701) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Metals provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of metals.