High temperature oxidation behavior of γ’-strengthened CoNi-base superalloys

被引：0
|
作者：
Yingju Li [1 ]
Shasha Qu [2 ,3 ]
Tianyu Liu [1 ,2 ]
Bingyu Lu [1 ,2 ]
Xiaohui Feng [1 ]
Yuansheng Yang [1 ]
机构：
[1] Institute of Metal Research, Chinese Academy of Sciences
[2] School of Materials Science and Engineering, University of Science and Technology of China
[3] Guangdong Institute of Special Equipment Inspection and
来源：
Corrosion Communications | 2024年 / 16卷 / 04期
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D O I：
暂无
中图分类号：
TG132.3 [特种热性质合金];
学科分类号：
摘要：
Oxidation behavior of γ’-strengthened CoNi-base superalloys was investigated with isothermal oxidation tests conducted in air at 800 and 900 ℃, respectively, for 100 h. It is observed that both 30Ni-10Al-4W-4Ti-2Ta（4W2Ta） and 30Ni-10Al-5W-4Ti-1Ta（5W1Ta） alloys exhibit a three-layered oxide scale structure after oxidation. Addition of Ta increases oxidation mass gain of Co Ni-based high-temperature alloys, but the effects on the type and distribution of oxidation products are not significant. However, the oxidation temperature has a great influence on oxide surface morphology and oxidation mechanisms for those two alloys. After oxidation at 800 ℃,the outermost oxide film contains Co3O4, CoO, and NiO, and when the oxidation temperature is 900 ℃, the outermost oxide film contains only CoO.
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页码：61 / 70
页数：10
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