Chromium vaporization of the ferritic steel Crofer22APU and ODS Cr5Fe1Y(2)O(3) alloy

E. Konysheva; U. Seeling; A. Besmehn; L. Singheiser; K. Hilpert

doi:10.1007/s10853-006-1194-1

Chromium vaporization of the ferritic steel Crofer22APU and ODS Cr5Fe1Y(2)O(3) alloy

E. Konysheva, U. Seeling, A. Besmehn, L. Singheiser, K. Hilpert

School of Chemistry

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

The chromium vaporization rate of the Crofer22APU steel as compared to Cr5Fe1Y(2)O(3) alloy was studied under humidified air at 800 degrees C over a period of up to 1300 h by using the transpiration method. Under oxidizing atmosphere, the Crofer22APU steel forms a (Cr,Mn)(3)O-4 spinel layer on the surface, which hinders chromium release at 800 degrees C by about a factor of 3 as compared to Cr5Fe1Y(2)O(3) alloy forming a pure chromia scale. The impact of minor alloying additives in the Crofer22APU ferritic steel on the chromium vaporization was considered. The steel with the lowest amount of Al and Si in the matrix exhibits a low chromium vaporization rate over 1300 h. The microstructure and composition of the oxide scales and surfaces formed were investigated using high-resolution scanning electron microscopy, X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry. The results obtained give insight into the chromium vaporization mechanism.

Original language	English
Pages (from-to)	5778-5784
Number of pages	7
Journal	Journal of Materials Science
Volume	42
DOIs	https://doi.org/10.1007/s10853-006-1194-1
Publication status	Published - Jul 2007

Keywords

INTERCONNECT EXPOSURE CONDITIONS
OXIDATION BEHAVIOR
STAINLESS-STEELS
FUEL-CELLS
OXIDE
SCALES
VAPOR

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10.1007/s10853-006-1194-1

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title = "Chromium vaporization of the ferritic steel Crofer22APU and ODS Cr5Fe1Y(2)O(3) alloy",

abstract = "The chromium vaporization rate of the Crofer22APU steel as compared to Cr5Fe1Y(2)O(3) alloy was studied under humidified air at 800 degrees C over a period of up to 1300 h by using the transpiration method. Under oxidizing atmosphere, the Crofer22APU steel forms a (Cr,Mn)(3)O-4 spinel layer on the surface, which hinders chromium release at 800 degrees C by about a factor of 3 as compared to Cr5Fe1Y(2)O(3) alloy forming a pure chromia scale. The impact of minor alloying additives in the Crofer22APU ferritic steel on the chromium vaporization was considered. The steel with the lowest amount of Al and Si in the matrix exhibits a low chromium vaporization rate over 1300 h. The microstructure and composition of the oxide scales and surfaces formed were investigated using high-resolution scanning electron microscopy, X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry. The results obtained give insight into the chromium vaporization mechanism.",

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author = "E. Konysheva and U. Seeling and A. Besmehn and L. Singheiser and K. Hilpert",

year = "2007",

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doi = "10.1007/s10853-006-1194-1",

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T1 - Chromium vaporization of the ferritic steel Crofer22APU and ODS Cr5Fe1Y(2)O(3) alloy

AU - Konysheva, E.

AU - Seeling, U.

AU - Besmehn, A.

AU - Singheiser, L.

AU - Hilpert, K.

PY - 2007/7

Y1 - 2007/7

N2 - The chromium vaporization rate of the Crofer22APU steel as compared to Cr5Fe1Y(2)O(3) alloy was studied under humidified air at 800 degrees C over a period of up to 1300 h by using the transpiration method. Under oxidizing atmosphere, the Crofer22APU steel forms a (Cr,Mn)(3)O-4 spinel layer on the surface, which hinders chromium release at 800 degrees C by about a factor of 3 as compared to Cr5Fe1Y(2)O(3) alloy forming a pure chromia scale. The impact of minor alloying additives in the Crofer22APU ferritic steel on the chromium vaporization was considered. The steel with the lowest amount of Al and Si in the matrix exhibits a low chromium vaporization rate over 1300 h. The microstructure and composition of the oxide scales and surfaces formed were investigated using high-resolution scanning electron microscopy, X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry. The results obtained give insight into the chromium vaporization mechanism.

AB - The chromium vaporization rate of the Crofer22APU steel as compared to Cr5Fe1Y(2)O(3) alloy was studied under humidified air at 800 degrees C over a period of up to 1300 h by using the transpiration method. Under oxidizing atmosphere, the Crofer22APU steel forms a (Cr,Mn)(3)O-4 spinel layer on the surface, which hinders chromium release at 800 degrees C by about a factor of 3 as compared to Cr5Fe1Y(2)O(3) alloy forming a pure chromia scale. The impact of minor alloying additives in the Crofer22APU ferritic steel on the chromium vaporization was considered. The steel with the lowest amount of Al and Si in the matrix exhibits a low chromium vaporization rate over 1300 h. The microstructure and composition of the oxide scales and surfaces formed were investigated using high-resolution scanning electron microscopy, X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry. The results obtained give insight into the chromium vaporization mechanism.

KW - INTERCONNECT EXPOSURE CONDITIONS

KW - OXIDATION BEHAVIOR

KW - STAINLESS-STEELS

KW - FUEL-CELLS

KW - OXIDE

KW - SCALES

KW - VAPOR

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DO - 10.1007/s10853-006-1194-1

M3 - Article

SN - 0022-2461

VL - 42

SP - 5778

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JO - Journal of Materials Science

JF - Journal of Materials Science

ER -

Chromium vaporization of the ferritic steel Crofer22APU and ODS Cr5Fe1Y(2)O(3) alloy

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Keywords

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