Effect of Y2O3 content on the oxidation behavior of Fe-Cr-Al-based ODS alloys

被引：0
|
作者：
Anwar Ul-Hamid
机构：
[1] King Fahd University of Petroleum and Minerals,Materials Characterization Laboratory, Center for Engineering Research, Research Institute
来源：
Journal of Materials Engineering and Performance | 2003年 / 12卷
关键词：
Fe-Cr-Al; MA956; oxidation; REE; TEM; Y; O;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A study was conducted to investigate the cyclic oxidation behavior of two oxide dispersion strengthened (ODS) Fe-Cr-Al based alloys containing 0.17 wt.% and 0.7 wt.% Y2O3. The alloys were oxidized in air for 100 h at 1200°C based on a 24 h cycle period. X-ray diffraction (XRD) and analytical transmission electron microscopy (TEM) were used to characterize the structure, morphology, and composition of the oxide scales. Both alloys formed highly adherent and continuous layers of α-Al2O3 exhibiting a morphology indicative of inward scale growth. The role of Y2O3 was to promote adherence by segregating to the grain boundaries within the oxide. Concurrently, Y2O3 generated micro-porosity resulting in a scale of comparatively higher thickness in the alloy with 0.7 wt.% Y2O3.
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页码：87 / 94
页数：7
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