High temperature oxidation kinetics of Fe-10Al-4Cr-4Y2O3 ODS alloy at 1200–1400 °C

Gamanov, Štěpán; Holzer, Jakub; Roupcová, Pavla; Svoboda, Jiřı́

doi:10.1016/j.corsci.2022.110498

Cited by 10 publications

(3 citation statements)

References 40 publications

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“…On the basis of the weight gain curves shown in Figure 3, the oxidation kinetics of SP2215, as described in Equation ( 1) [35,36], follow a parabolic trend with a rate constant of 2, with diffusion-controlled layer growth by a constant diffusion coefficient, in both environments examined in this study.…”

Section: Oxidation Kineticsmentioning

confidence: 76%

High-Temperature Steam and Atmospheric Oxidation Characteristic of a Heat-Resistant SP2215 Steel

Xu,

Wu,

Huang

et al. 2024

Coatings

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The high-temperature oxidation performance of SP2215 has become an important issue when they were used as superheaters and reheaters exposed to two different high-temperature environments. In this study, the oxidation behavior of SP2215 steel was investigated under steam and an atmosphere of 650–800 °C for 240 h. The microstructural and chemical characterization of the samples were performed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), a glow discharge optical emission spectrometer (GD-OES), and atomic force microscope (AFM). The kinetic curves of oxidation revealed excellent oxidation resistance under both environments, but significant different oxidation characteristics, oxide film composition, and structure were obvious. In the steam experiment, selective intergranular oxidation was evident at relatively low temperatures, which was attributed to the preference absorption of supercritical water molecules at the grain boundary. Conversely, a double-layer structure of outer Fe2O3 and a small amount of Fe3O4 and inner Cr2O3 was formed uniformly at 800 °C. In the high-temperature atmosphere experiment, a protective chromium film was dominant at 650–700 °C, and a loose multicomponent oxide film was formed at 750–800 °C, primarily consisting of Cr2O3, spinel FeCr2O4, and CuO.

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Section: Oxidation Kineticsmentioning

confidence: 76%

High-Temperature Steam and Atmospheric Oxidation Characteristic of a Heat-Resistant SP2215 Steel

Xu,

Wu,

Huang

et al. 2024

Coatings

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show abstract

“…Thus, the Al content is chosen as high as possible (10%) while still preserving the ferritic matrix. The addition of Cr supports the formation of larger grains after secondary recrystallization and also improves oxidation resistance [44,46,47].…”

Section: Methodsmentioning

confidence: 92%

“…The creep and oxidation-resistant Fe-10Al-4Cr-4Y 2 O 3 (wt.% are used in the whole paper) ODS nanocomposite, denoted as the FeAlOY, has already demonstrated its promising potential for mechanically loaded long-term applications in the temperature range of 1100-1300 • C [31,36,38,41,42]. The FeAlOY is strengthened by 5 vol.% of nanodispersion of pure Y 2 O 3 (the difference between 5 vol.% and 4 wt.% is given by the difference in densities of the matrix 6.5 g/cm 3 and of Y 2 O 3 5.0 g/cm 3 ), being the most resistant phase against coarsening [41,43], and has an appreciable resistance against oxidation up to 1400 • C [44].…”

mentioning

confidence: 99%

The Optimization of Mechanical Alloying Conditions of Powder for the Preparation of a Fe-10Al-4Cr-4Y2O3 ODS Nanocomposite

et al. 2022

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Mechanical alloying (MA) of powders represents the first processing step in the production of oxide dispersion-strengthened (ODS) alloys. MA is a time and energy-consuming process also in the production of Fe-10Al-4Cr-4Y2O3 creep and oxidation-resistant ODS nanocomposite, denoted as the FeAlOY, and it deserves to be optimized. MA is performed at two different temperatures at different times. The powder after MA, as well as the microstructure and high-temperature strength of the final FeAlOY, are characterized and the optimal MA conditions are evaluated. The obtained results show that the size distribution of the powder particles, as well as the dissolution and homogenization of the Y2O3, becomes saturated quite soon, while the homogenization of the metallic components, such as Al and Cr, takes significantly more time. The high-temperature tensile tests and grain microstructures of the secondary recrystallized FeAlOY, however, indicate that the homogenization of the metallic components during MA does not influence the quality of the FeAlOY, as the matrix of the FeAlOY is sufficiently homogenized during recrystallization. Thus, the conditions of MA correspond to sufficient dissolution and homogenization of Y2O3 and can be considered the optimal ones.

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Unraveling the origin of the excellent high-temperature oxidation resistance of an AlCrFeNiTi complex concentrated alloy

Shen

et al. 2023

Corrosion Science

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High temperature oxidation kinetics of Fe-10Al-4Cr-4Y2O3 ODS alloy at 1200–1400 °C

Cited by 10 publications

References 40 publications

High-Temperature Steam and Atmospheric Oxidation Characteristic of a Heat-Resistant SP2215 Steel

High-Temperature Steam and Atmospheric Oxidation Characteristic of a Heat-Resistant SP2215 Steel

The Optimization of Mechanical Alloying Conditions of Powder for the Preparation of a Fe-10Al-4Cr-4Y2O3 ODS Nanocomposite

Unraveling the origin of the excellent high-temperature oxidation resistance of an AlCrFeNiTi complex concentrated alloy

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