Grain Size Effect and Spinel Transition for Alumina Scale Thermally Grown on Rare Earth-Mg Codoped FeCrAl Alloy

被引：0

作者：

Duan, Xiu-Feng ^{[1
,2
]}

Zhang, Shou-Lu ^{[2
]}

Liu, Bao-Sheng ^{[1
]}

Hou, Li-Feng ^{[3
]}

Wang, Zhi-Guo ^{[2
]}

Wang, Qian ^{[3
]}

Wei, Ying-Hui ^{[1
,3
]}

机构：

[1] Taiyuan Univ Sci & Technol, Coll Mat Sci & Engn, 66 Waliu Rd, Taiyuan 030024, Peoples R China

[2] Taiyuan Iron & Steel Grp Co Ltd, State Key Lab Adv Stainless Steel, 2 Jiancaoping St, Taiyuan 030003, Peoples R China

[3] Taiyuan Univ Technol, Coll Mat Sci & Engn, 79 Yingze W St, Taiyuan 030024, Peoples R China

来源：

STEEL RESEARCH INTERNATIONAL | 2024年 / 95卷 / 08期

关键词：

diffusion mechanism; grain refinement; MgAl2O4; oxidation; spallation resistance; FE-CR-AL; OXYGEN SELF-DIFFUSION; OXIDATION RESISTANCE; CR2O3; SCALES; SEGREGATION; MECHANISM; MICROSTRUCTURE; BOUNDARIES; SPALLATION; KINETICS;

D O I：

10.1002/srin.202400202

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The synergistic effects of rare earth (RE) and Mg elements on the high-temperature oxidation resistance of Fe-20Cr-6Al alloy are investigated in-depth. The scale on RE-Mg codoped alloy mainly consists of alpha-Al2O3/MgAl2O4, with many pores caused by spinel transition. Owing to the segregation of RE ion at the grain boundaries, there is a significant refinement effect of oxide grains, which improves the spallation resistance of scale and offers more grain boundary diffusion pathways for ion transport, resulting in an obvious increase of oxidation weight gain. The findings indicate that RE is beneficial for inhibiting the grow-up of oxide grains, whereas Mg can weaken the compactness of scale.

引用

页数：11