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.

引用

页数：11

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