Impedance spectroscopy and microstructural characterization of the corrosion behavior of FeCrAl alloy in lead–bismuth eutectic

Chen, Xiang; Haasch, Richard T.; Stubbins, James F.

doi:10.1016/j.jnucmat.2011.11.016

Cited by 22 publications

(9 citation statements)

References 29 publications

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“…Figure 6 shows TEM image of Fe-20Cr-5Al alloy after 100 hours of exposure, in which additional phases containing Zr, Hf, and Y were observed mainly in the upper part of the stable α-Al 2 O 3 scale. In addition, the presence of reactive elements (Zr, Y and Hf) in Fe-20Cr-5Al alloy had positive impact on the growth and formation of an Al 2 O 3 scale [14,15]. The EDX analysis qualitatively confirmed the existent of those elements.…”

Section: Resultsmentioning

confidence: 69%

Transmission Electron Microscopy Characterization of High-Temperatur Oxidation of Fe-20Cr-5Al Alloy Prepared by Focused Ion Beam Technique

Dani¹,

Untoro²,

Putra³

et al. 2015

MST

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The Focused Ion Beam (FIB) technique was applied for cross section preparation of the oxidized alloy for Transmission Electron Microscopy (TEM) study. Prior to preparation, the specimens of Fe-20Cr-5Al alloy sheet were oxidized in air at 1200 o C for 2 minutes, 10 minutes, 2 hours, and 100 hours. The microstructure and elemental composition of the samples were characterized using TEM equipped with an Energy Dispersive X-Ray Spectroscopy (EDX). The Electron Energy Loss Spectroscopy (EELS) was used to determine of the light elements. The TEM investigation reveals remarkable microstructure evolution of the specimens during oxidation which generally exhibit a typical multi-layer structure. The TEM images, however, can provide detailed description about the phases occur after oxidation such as the Tungsten (W) and the Gallium (Ga) layers on top of the samples obviously formed during FIB preparation, the formation of Al 2 O 3 and Cr 2 O 3 layer, MgAl 2 O 4 spinel, porosity, Zr/Hf/Mg phases or clusters inside the oxide scale. Hence, the FIB technique has been proven to be reliable preparation technique for microstructural and elemental studies of Fe-20Cr-5Al alloy using TEM. . Sebelum persiapan dilakukan, spesimen lembar aloi Fe-20Cr-5Al dioksidasi di udara pada suhu 1200 o C selama 2 menit, 10 menit, 2 jam, dan 100 jam. Struktur mikro dan komposisi elemen dari sampel tersebut dianalisis menggunakan TEM yang dilengkapi dengan Spektroskopi Sinar-X Energi Dispersif atau Energy Dispersive X-Ray Spectroscopy (EDX). Spektroskopi Kehilangan Energi Elektron atau Electron Energy Loss Spectroscopy (EELS) digunakan untuk menentukan elemen cahaya. Penggunaan TEM memperlihatkan evolusi struktur mikro yang luar biasa pada spesimen ketika oksidasi dilakukan, yang biasanya memperlihatkan struktur berlapis yang tipikal. Citra TEM memberikan deskripsi yang mendetail mengenai berbagai fase yang muncul setelah oksidasi, seperti lapisan Tungsten (W) dan Gallium (Ga) yang terbentuk di atas sampel selama masa persiapan FIB, pembentukan lapisan Al 2 O 3 dan Cr 2 O 3, spinel MgAl 2 O 4 , porositas, berbagai fase atau kelompok Zr/Hf/Mg di dalam skala oksida. Maka dari itu, teknik FIB telah terbukti sebagai teknik persiapan yang dapat diandalkan untuk meneliti struktur mikro dan elemen dari aloi Fe-20Cr-5Al dengan TEM. Abstrak

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Section: Resultsmentioning

confidence: 69%

Transmission Electron Microscopy Characterization of High-Temperatur Oxidation of Fe-20Cr-5Al Alloy Prepared by Focused Ion Beam Technique

Dani¹,

Untoro²,

Putra³

et al. 2015

MST

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“…ALK showed superior protection compared to APM. Previously reported[41] surface analysis of the oxide layer of FeCrAl in LBE with saturated oxygen found an identical surface morphology and Al 2 O 3 layer with the ALK sample. Not only ALK surfaces had significantly less area Al-oxide delamination (about 50 at.% versus 90 at.% in case of APM), but the lack of dissolution pits on ALK sample would indicate that the Fe-Cr-Al-oxide inner-layer provided additional protection when the Al 2 O 3 was not present and acted as a passivation layer (for all tests except the 800°C APM).…”

supporting

confidence: 55%

Oxide scale formation on 316L and FeCrAl steels exposed to oxygen controlled static LBE at temperatures up to 800 °C

Cionea

Abad

Aussat

et al. 2016

Solar Energy Materials and Solar Cells

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The corrosion behavior of three stainless steels (316L, Alkrothal 720 and Kanthal-APM) in static LBE with oxygen concentration of 10-5 wt% at temperatures of 700°C for 230 hours and 800°C for 360 hours was studied. The steel surface morphology of the oxide scales formed was investigated by SEM, XRD and Raman spectroscopy and the cross-section and by SEM and EDX. A transitional inner-layer of Fe-Cr-Al oxides was found at the substrate interface and an Al-oxide outer layer on the Fe-Cr-Al alloys. Fast growing non-protective oxide scale with underlying dissolution was observed on the 316L alloy.

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“…The excellent LMC resistance of Al/Si-containing Fe-Cr ferritic steels and Fe-Cr-Ni AuSS has been demonstrated in many studies [111,132,207,214,236,238,245,246,248,250,[592][593][594][595][597][598][599][600][601][602][603][604][605][606][607][608][609]. In particular, AFA stainless steels with a suggested nominal composition of Fe-(20-29)Ni-(15.2-16.5)Cr-(2.3-4.3)Al (all in wt%) might exhibit good resistance to both LMC and LME, since these steels are effectively passivated by the formation of Cr 2 O 3 and Cr 2 O 3 -Al 2 O 3 oxide scales, and they show little susceptibility to LME due to their fcc crystal structure [593,610].…”

Section: Elemental Alloying Of Steelsmentioning

confidence: 91%

Environmental degradation of structural materials in liquid lead- and lead-bismuth eutectic-cooled reactors

Gong

Short

Auger

et al. 2022

Progress in Materials Science

161

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Impedance spectroscopy and microstructural characterization of the corrosion behavior of FeCrAl alloy in lead–bismuth eutectic

Cited by 22 publications

References 29 publications

Transmission Electron Microscopy Characterization of High-Temperatur Oxidation of Fe-20Cr-5Al Alloy Prepared by Focused Ion Beam Technique

Transmission Electron Microscopy Characterization of High-Temperatur Oxidation of Fe-20Cr-5Al Alloy Prepared by Focused Ion Beam Technique

Oxide scale formation on 316L and FeCrAl steels exposed to oxygen controlled static LBE at temperatures up to 800 °C

Environmental degradation of structural materials in liquid lead- and lead-bismuth eutectic-cooled reactors

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