Effect of Hf on high-temperature oxidation behavior of chromia-forming AlxCoCrFeNi alloys

被引：0
|
作者：
Jawańska, M. [1 ]
Dąbrowa, J. [1 ]
Bik, M. [1 ]
Rogal, L. [2 ]
Cieślak, G. [3 ]
Gil, A. [1 ]
Galetz, M. [4 ]
Jedliński, J. [1 ]
机构：
[1] AGH University of Krakow, Faculty of Materials Science and Ceramics, Al. Mickiewicza 30, Krakow,30-059, Poland
[2] Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, Kraków,30-059, Poland
[3] Warsaw University of Technology, Faculty of Materials Science and Engineering, Woloska 141, Warszawa,02–507, Poland
[4] DECHEMA-Forschungsinstitut, Theodor-Heuss-Allee 25, Frankfurt am Main,D60486, Germany
来源：
Corrosion Science | 2024年 / 240卷
关键词：
Alkali metal alloys - Aluminum corrosion - Corrosion resistant alloys - Hafnium alloys - Hafnium oxides - High temperature corrosion - High-entropy alloys - Internal oxidation - Oxidation resistance - Rare earth alloys - Ternary alloys;
D O I：
10.1016/j.corsci.2024.112455
中图分类号：
学科分类号：
摘要：
Nanodispersion of HfO2 is deposited on the surfaces of chromia-forming Alx(CoCrFeNi)100−x high entropy alloys (x = 3; 6; 9) to improve their resistance to high-temperature oxidation in air at 900 °C. A strong effect of Hf as a reactive element is well-confirmed through several-fold reduction in mass gains, suppressed scale spallation, simplified oxide scale composition (mainly Cr2O3), and inhibited internal oxidation and nitridation, compared to the unmodified reference materials. Its beneficial influence is visible particularly during the especially challenging long-term thermal cycling. The study proves the wide possibilities for obtaining highly efficient HEA-based materials for high-temperature industrial applications. © 2024
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