Effect of Cu addition on high-temperature oxidation behavior of 25Cr-20Ni austenitic stainless steel

被引：0
作者：
Lee, Gunjick [1 ,2 ]
Jung, Heechan [2 ]
Ko, Yoon Seok [1 ]
Kim, Dong-Ik [1 ]
Sohn, Seok Su [2 ]
Shim, Jae-Hyeok [1 ,3 ]
机构：
[1] Korea Inst Sci & Technol KIST, Ctr Hydrogen Energy Mat, Seoul 02792, South Korea
[2] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea
[3] Sungkyunkwan Univ SKKU, KIST SKKU Carbon Neutral Res Ctr, Suwon 02841, Gyeonggi, South Korea
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2025年 / 35卷
关键词：
Austenitic stainless steel; Oxidation; Transmission kikuchi diffraction; Oxide layer; Corundum oxide; Spinel oxide; POWER-PLANTS; PRECIPITATION BEHAVIOR; INITIAL OXIDATION; CREEP; FE; EVOLUTION; DIFFUSION; 304-STAINLESS-STEEL; CHROMIUM; ALLOYS;
D O I：
10.1016/j.jmrt.2025.02.134
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of Cu addition on the air oxidation behavior of 25Cr-20Ni austenitic stainless steels was investigated at 700 degrees C. The steel with Cu exhibited larger weight gain and greater oxide layer thickness than the steel without Cu. The transmission Kikuchi diffraction analysis results clearly indicated that the surface oxide scales consist of three distinct oxide phase layers in both steels. The overall oxide layer sequence was consistent with thermodynamic calculations; outermost Fe-rich corundum oxide, intermediate spinel oxide and inner Cr-rich corundum oxide layers. It seems that the presence of Cu increases the outward diffusion rate of alloying elements in both matrix and oxide layers during oxidation, eventually enhancing oxidation kinetics.
引用
收藏
页码：4543 / 4552
页数：10
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