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

关键词：

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.

引用

页码：61 / 70

页数：10

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