Effect of Mo on the high temperature oxidation behavior of Al19Fe20-xCo20-xNi41Mo2x high entropy alloys

被引：19
作者：
Peng, Zhen [1 ]
Sun, Jian [1 ]
Luan, Hengwei [2 ,3 ,4 ]
Chen, Na [2 ]
Yao, Kefu [2 ]
机构：
[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China
[2] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
[3] City Univ Hong Kong, Dept Mech Engn, Tat Chee Ave, Hong Kong 999077, Peoples R China
[4] City Univ Hong Kong, Natl Precious Met Mat Engn Res Ctr, Hong Kong Branch, Tat Chee Ave, Hong Kong 999077, Peoples R China
来源：
INTERMETALLICS | 2023年 / 155卷
基金：
中国国家自然科学基金;
关键词：
High entropy alloy; Oxidation resistance; Microstructure; Oxidation mechanism; DUCTILITY; AL;
D O I：
10.1016/j.intermet.2023.107845
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The eutectic high-entropy alloys (EHEAs) are a promising family of alloys for high-temperature application, while their high-temperature oxidation and the effect of refractory elements are not well known. In this work, the high-temperature oxidation of the Al19Fe20-xCo20-xNi41Mo2x (x = 0, 1, 2) EHEAs is investigated. The EHEA with no Mo addition forms a porous oxides scale with three layers and shows the lowest oxidation resistance. With minor addition of Mo, which can facilitate the selective oxidation of Al, the EHEA forms a dense and continuous oxides scale and has a significantly improved high-temperature oxidation resistance. With more Mo addition, the EHEA shows lower oxidation resistance due to the formation of volatile Mo oxides, which can evaporate and leave channels for oxygen. These results could be helpful in understanding the oxidation resistance of the Mo-containing HEAs.
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页数：6
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