Improved oxidation behavior of M-20Cr-20Ta (M: Ni, Fe, Co) ternary alloys by formation of complex Cr-Ta-based oxides

被引：0
|
作者：
Tang, Chongchong [1 ]
Schaefer, Bjoern [1 ]
Schroer, Carsten [1 ]
Gorr, Bronislava [1 ]
机构：
[1] Karlsruhe Inst Technol KIT, Inst Appl Mat IAM AWP, D-76021 Karlsruhe, Germany
来源：
CORROSION SCIENCE | 2025年 / 249卷
关键词：
Ternary alloys; High-temperature oxidation; CrTaO 4 and CrTa 2 O 6; Oxidation kinetics; Microstructural evolution; HIGH-TEMPERATURE OXIDATION; HIGH-ENTROPY ALLOY; CYCLIC-OXIDATION; DIFFUSION; KINETICS; MICROSTRUCTURE; VOLATILIZATION; ADDITIONS; CHROMIUM; CRTAO4;
D O I：
10.1016/j.corsci.2025.112847
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The oxidation behavior and microstructural evolution of M-20Cr-20Ta (M: Ni, Fe, Co) alloys are investigated at 1000 degrees C and 1200 degrees C in Ar-20 vol% O2. High-temperature oxidation results in growth of bi-layered oxide scales, featuring an outer Cr2O3 layer and an inner Cr-Ta oxide layer. The Cr-Ta oxide layer consists of two distinct phases: CrTaO4 and CrTa2O6. Significant improvements in oxidation resistance are found for Co and Fe alloys, in consequence of formation of the Cr-Ta oxides. At 1200 degrees C, oxidation kinetics approach a cubic growth law after an initial transient stage, underscoring the exceptional protective capabilities of the Cr-Ta oxides.
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页数：12
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