Role of the rare-earth elements effect in transforming the oxidation behavior of AlxCoCrFeNi high entropy alloys

被引：12
|
作者：
Jawanska, M. [1 ]
Dabrowa, J. [1 ]
Bik, M. [1 ]
Cieslak, G. [2 ]
Jelen, P. [1 ]
Mroczka, K. [3 ]
Wyrwa, J. [1 ]
Rogal, L. [4 ]
Gil, A. [1 ]
Galetz, M. [5 ]
Jedlinski, J. [1 ]
机构：
[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Al Mickiewicza 30, PL-30059 Krakow, Poland
[2] Warsaw Univ Technol, Fac Mat Sci & Engn, Woloska 141, PL-02507 Warsaw, Poland
[3] Cracow Univ Technol, Fac Mat Engn & Phys, Warszawska 24, PL-31155 Krakow, Poland
[4] Polish Acad Sci, Inst Met & Mat Sci, Reymonta 25, PL-30059 Krakow, Poland
[5] DECHEMA Forschungsinstitut, Theodor Heuss Allee 25, D-60486 Frankfurt, Germany
来源：
CORROSION SCIENCE | 2023年 / 222卷
关键词：
Thermal cycling (B); High temperature corrosion (C); Oxidation (C); Rare earth elements (A); Alloy (A); HIGH-TEMPERATURE OXIDATION; NI-CR-AL; ELECTRICAL-PROPERTIES; METALLIC INTERCONNECTS; MECHANICAL-BEHAVIOR; POWDER DIFFRACTION; HIGH-PRESSURE; MICROSTRUCTURE; PRECIPITATION; RAMAN;
D O I：
10.1016/j.corsci.2023.111412
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The immersion method leading to the formation of nano-dispersion of Gd2O3 on the surface of Al-x(CoCrFeNi) (100- x) alloys (x = 3; 6; 9) is used to improve their corrosion resistance in air at 900. degrees C. Gd-modified samples' mass gains are greatly reduced and scales' spallation is nearly suppressed during thermal cyclic oxidation. Scales of the modified samples are much simpler, consisting mainly of Cr2O3, and spinel precipitates, with very low thickness (<5 mu m) even after long exposures. Analysis of the oxidation products confirms the radically different oxidation behavior of the modified samples, proving the effectiveness of the reactive elements effects in HEAs.
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页数：15
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