Imaging of mass transports around the oxide scale/Fe-Cr alloy interfaces

Teruhisa Horita; Yueping Xiong; Katsuhiko Yamaji; Haruo Kishimoto; Natsuko Sakai; Manuel E. Brito; Harumi Yokokawa

doi:10.1016/j.ssi.2004.07.040

Imaging of mass transports around the oxide scale/Fe-Cr alloy interfaces

Teruhisa Horita^*
, Yueping Xiong
, Katsuhiko Yamaji
, Haruo Kishimoto
, Natsuko Sakai
, Manuel E. Brito
, Harumi Yokokawa

^*Corresponding author for this work

National Institute of Advanced Industrial Science and Technology

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

14 Scopus citations

Abstract

Mass transport phenomenon was investigated for the oxidation of Fe-Cr alloy in CH₄-H₂O at 1073 K. Grain boundary diffusion of elements was visualized around the oxide scale/alloy interfaces by secondary ion mass spectrometry (SIMS) imaging analysis. The distributions of elements on the oxide scale and alloy were analyzed in an area of 150 μm in diameter. The SIMS images show high concentration of Mn at the grain boundary. The depth profiles at the grain boundary from the images of Cr and Mn show high and constant concentration, suggesting fast diffusion of these elements. On the other hand, depth profiles at the bulk of the alloy show a specific distribution of each element from surface to inner of the scale: Mn-Fe-(Cr)-rich oxide, Cr₂O₃-rich, and SiO₂-rich layers and alloy bulk with Al₂O₃ as internal oxides. The growth mechanism and scale formation kinetics are discussed.

Original language	English
Pages (from-to)	41-48
Number of pages	8
Journal	Solid State Ionics
Volume	174
Issue number	1-4
DOIs	https://doi.org/10.1016/j.ssi.2004.07.040
State	Published - 29 Oct 2004
Externally published	Yes

Keywords

Fe-Cr alloy
Grain boundary
Oxide scale
SIMS
SOFCs

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10.1016/j.ssi.2004.07.040

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@article{f3283b154f73444c9c23887f4ccab8d2,

title = "Imaging of mass transports around the oxide scale/Fe-Cr alloy interfaces",

abstract = "Mass transport phenomenon was investigated for the oxidation of Fe-Cr alloy in CH4-H2O at 1073 K. Grain boundary diffusion of elements was visualized around the oxide scale/alloy interfaces by secondary ion mass spectrometry (SIMS) imaging analysis. The distributions of elements on the oxide scale and alloy were analyzed in an area of 150 μm in diameter. The SIMS images show high concentration of Mn at the grain boundary. The depth profiles at the grain boundary from the images of Cr and Mn show high and constant concentration, suggesting fast diffusion of these elements. On the other hand, depth profiles at the bulk of the alloy show a specific distribution of each element from surface to inner of the scale: Mn-Fe-(Cr)-rich oxide, Cr2O3-rich, and SiO2-rich layers and alloy bulk with Al2O3 as internal oxides. The growth mechanism and scale formation kinetics are discussed.",

keywords = "Fe-Cr alloy, Grain boundary, Oxide scale, SIMS, SOFCs",

author = "Teruhisa Horita and Yueping Xiong and Katsuhiko Yamaji and Haruo Kishimoto and Natsuko Sakai and Brito, \{Manuel E.\} and Harumi Yokokawa",

year = "2004",

month = oct,

day = "29",

doi = "10.1016/j.ssi.2004.07.040",

language = "英语",

volume = "174",

pages = "41--48",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier B.V.",

number = "1-4",

}

TY - JOUR

T1 - Imaging of mass transports around the oxide scale/Fe-Cr alloy interfaces

AU - Horita, Teruhisa

AU - Xiong, Yueping

AU - Yamaji, Katsuhiko

AU - Kishimoto, Haruo

AU - Sakai, Natsuko

AU - Brito, Manuel E.

AU - Yokokawa, Harumi

PY - 2004/10/29

Y1 - 2004/10/29

N2 - Mass transport phenomenon was investigated for the oxidation of Fe-Cr alloy in CH4-H2O at 1073 K. Grain boundary diffusion of elements was visualized around the oxide scale/alloy interfaces by secondary ion mass spectrometry (SIMS) imaging analysis. The distributions of elements on the oxide scale and alloy were analyzed in an area of 150 μm in diameter. The SIMS images show high concentration of Mn at the grain boundary. The depth profiles at the grain boundary from the images of Cr and Mn show high and constant concentration, suggesting fast diffusion of these elements. On the other hand, depth profiles at the bulk of the alloy show a specific distribution of each element from surface to inner of the scale: Mn-Fe-(Cr)-rich oxide, Cr2O3-rich, and SiO2-rich layers and alloy bulk with Al2O3 as internal oxides. The growth mechanism and scale formation kinetics are discussed.

AB - Mass transport phenomenon was investigated for the oxidation of Fe-Cr alloy in CH4-H2O at 1073 K. Grain boundary diffusion of elements was visualized around the oxide scale/alloy interfaces by secondary ion mass spectrometry (SIMS) imaging analysis. The distributions of elements on the oxide scale and alloy were analyzed in an area of 150 μm in diameter. The SIMS images show high concentration of Mn at the grain boundary. The depth profiles at the grain boundary from the images of Cr and Mn show high and constant concentration, suggesting fast diffusion of these elements. On the other hand, depth profiles at the bulk of the alloy show a specific distribution of each element from surface to inner of the scale: Mn-Fe-(Cr)-rich oxide, Cr2O3-rich, and SiO2-rich layers and alloy bulk with Al2O3 as internal oxides. The growth mechanism and scale formation kinetics are discussed.

KW - Fe-Cr alloy

KW - Grain boundary

KW - Oxide scale

KW - SIMS

KW - SOFCs

UR - https://www.scopus.com/pages/publications/10044249883

U2 - 10.1016/j.ssi.2004.07.040

DO - 10.1016/j.ssi.2004.07.040

M3 - 文章

AN - SCOPUS:10044249883

SN - 0167-2738

VL - 174

SP - 41

EP - 48

JO - Solid State Ionics

JF - Solid State Ionics

IS - 1-4

ER -

Imaging of mass transports around the oxide scale/Fe-Cr alloy interfaces

Abstract

Keywords

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