Phase transformation-mediated high-temperature oxidation in an AlCrFeCoNi2.1 EHEA alloy at elevated temperature

被引：37
作者：
Chen, Yiwen [1 ,2 ]
Ma, Shuo [1 ]
Ju, Jiang [3 ]
Chen, Kai [4 ]
Wang, Jingya [1 ,5 ,6 ]
Shen, Zhao [1 ,5 ,6 ,7 ]
Zeng, Xiaoqin [1 ,5 ,6 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[2] Jiangnan Univ, Sch Intelligent Mfg, Jiangsu Key Lab Adv Food Mfg Equipment & Technol, Wuxi 214122, Peoples R China
[3] City Univ Hong Kong, Coll Sci & Engn, Dept Mat Sci & Engn, Hong Kong, Peoples R China
[4] Shanghai Jiao Tong Univ, Sch Nucl Sci & Engn, Shanghai 200240, Peoples R China
[5] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China
[6] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
[7] Shanghai Jiao Tong Univ, Inst & Med Robot, Shanghai 200240, Peoples R China
来源：
CORROSION SCIENCE | 2025年 / 245卷
关键词：
High entropy alloy; AlCrFeCoNi; Oxidation; Phase transformation; TEM characterization; HIGH-ENTROPY ALLOY; SUPERCRITICAL WATER; AL ADDITION; OXIDE-FILM; MICROSTRUCTURE; MECHANISM; BEHAVIOR; DUCTILITY; EVOLUTION;
D O I：
10.1016/j.corsci.2025.112674
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behavior of an AlCrFeCoNi2.1 eutectic high-entropy alloy (EHEA) at 800 degrees C in air was meticulously examined. Under steady-state oxidation conditions, the oxide scale predominantly features a continuous and dense Al2O3 layer, interspersed with blocky Fe2O3 and Cr2O3 formations. Beneath the original surface, a single FCC matrix layer emerges due to a phase transition from BCC to FCC, driven by the extensive consumption of Al in the formation of Al2O3. This unique duplex-layer structure, comprising an Al2O3-based oxide scale and an Al- depleted FCC matrix layer, markedly enhances the oxidation performance of the alloy.
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页数：8
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