期刊
CORROSION SCIENCE
卷 202, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110309
关键词
Nickel; Superalloys; Modeling studies; AFS; Oxidation; High temperature corrosion
资金
- National Key Research and Development Program [2021YFB3700601, 2017YFA0402803]
- Natural Science Foundation of Shanghai [22ZR1474900, 19ZR1421800]
- Youth Innovation Promotion Association CAS [2020260]
- Science and technology innovation 2025 Key Project of Ningbo City [2019B10084]
- National Natural Science Foundation of China [52071331, 52071330]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDA 21080100]
This study investigated the oxidation behavior of Ni-28 W alloy with Hf doping and found that Hf doping can significantly reduce the oxidation rate of the alloy and decrease the thickness of the internal oxide scales.
The oxidation behavior of Ni-28 W alloy with Hf doping at 700 degrees C, 775 degrees C and 850 degrees C was investigated. Hf doping significantly reduces the oxidation rate of alloys and decreases the thickness of the internal oxide scales, except the outer NiO ones. Hf is preferentially solid-soluted in the internal oxide (NiWO4) layer and occupies the position of Ni2+ by Hf4+, hindering the formation of oxygen vacancies. The lower oxygen pressure in the inner oxide layer of the alloy with Hf doping leads to the formation of inner tungsten oxide WOn (n = 2-3).
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