Exceptional high-temperature oxidation resistance and mechanisms of a novel chemically complex intermetallic alloy

被引：5
作者：
Hou, Jinxiong [1 ,2 ,3 ]
Gan, Jie [1 ]
Li, Wanpeng [1 ]
Tian, Hongzhou [1 ]
Luo, Xier [1 ]
Ju, Jiang [1 ]
Zhou, Yinghao [4 ]
Liu, Shaofei [4 ]
Yao, Hongwei [5 ]
Chen, Zhenghao [6 ]
Yang, Tao [1 ,2 ,3 ]
机构：
[1] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Hong Kong Inst Adv Study, Hong Kong, Peoples R China
[3] City Univ Hong Kong, Shenzhen Res Inst, Shenzhen 518057, Peoples R China
[4] City Univ Hong Kong, Dept Mech Engn, Hong Kong, Peoples R China
[5] Chinese Acad Sci, Key Lab Marine Mat & Related Technol, Ningbo 315201, Peoples R China
[6] Kyoto Univ, Ctr Elements Strategy Initiat Struct Mat ESISM, Kyoto 6068501, Japan
来源：
CORROSION SCIENCE | 2023年 / 225卷
基金：
中国国家自然科学基金;
关键词：
Intermetallic alloys; Oxidation resistance; Microstructures; Oxidation mechanisms; BEHAVIOR; SUPERALLOYS; NI3AL; AIR; CR;
D O I：
10.1016/j.corsci.2023.111607
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel chemically complex intermetallic alloy (CCIMA) dominated with an ordered L12 structure was designed based on the multicomponent Ni-Co-Cr-Al-Mo-Ti-Ta-Nb-B system. Its oxidation behaviors and underlying mechanisms were systematically investigated. Oxidation at 900 degrees C and 1000 degrees C results in the formation of main multicomponent spinel oxides in the outmost layer, spinel oxides containing rutile-type oxides and boron oxides in the intermediate layer, and continuous Al2O3 in the inner layer. Furthermore, oxidation leads to phase transformation from L12 to D024 at the matrix/oxide layer interface due to Al-depletion. The continuously formed inner Al2O3 oxides have well protected the alloy from oxidizing.
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收藏
页数：11
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