Effects of Cr and Al additions on the oxidation of FeCoNi-based medium-and high-entropy alloys in CO2/CO mixed gases

被引：0

作者：

Kai, Wu ^{[1
,2
]}

Wang, Yen-che ^{[1
]}

Huang, Yu-jing ^{[1
]}

Lu, Kuan-yuan ^{[1
]}

Wang, Wei-bing ^{[3
]}

Zhou, Yinghao ^{[3
]}

Kai, Ji-jung ^{[3
]}

机构：

[1] Natl Taiwan Ocean Univ, Dept Optoelect & Mat Technol, Keelung 20224, Taiwan

[2] Natl Taiwan Ocean Univ, Inst Mat Engn, Keelung 20224, Taiwan

[3] City Univ Hong Kong, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2025年 / 1022卷

关键词：

FeCoNi-based medium; and high-entropy alloys; CoO; FeCoCrO; 4; alpha-Al; 2; O; 3; NiCoO2; HIGH-TEMPERATURE OXIDATION; INTERNAL OXIDATION; AIR-OXIDATION; BEHAVIOR; MICROSTRUCTURE; DEFORMATION; MORPHOLOGY; MECHANISM;

D O I：

10.1016/j.jallcom.2025.179952

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 effects of Cr and Al additions on the oxidation of FeCoNi-based medium- and high-entropy alloys containing FeCoNi, FeCoNiCr, and FeCoNiCrAl0.3 were studied at 600-950 degrees C in a 9:1 CO2/CO gas mixture. The oxidation kinetics of all three alloys obeyed the parabolic-rate law, and their oxidation rates steadily increased with temperature. The scales formed on FeCoNi consisted of an intermixed layer of CoO and Fe3O4 and internal FeO precipitates (observed at 950 degrees C). Those formed on FeCoNiCr consisted of an outer layer of CoNiO2 intermixed with FeCoCrO4 and an inner layer of Cr2O3. The scale formed on FeCoNiCrAl0.3 was strongly temperaturedependent, consisting of discontinuous Cr2O3 granules at 600 degrees C, internal Al2O3 precipitates formed beneath a Cr2O3 layer at 760 degrees C, and an exclusive alpha-Al2O3 layer at 950 degrees C.

引用

页数：10

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