The effect of short-range order on passivation of Fe-Cr alloys

Minglu Liu; Ashlee Aiello; Yusi Xie; Karl Sieradzki

doi:10.1149/2.0871811jes

The effect of short-range order on passivation of Fe-Cr alloys

Minglu Liu, Ashlee Aiello, Yusi Xie, Karl Sieradzki

Engineering of Matter, Transport and Energy, School for (IAFSE-SEMTE)

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

15 Scopus citations

Abstract

While it is well known that 12–13 at.% chromium is required for stainless-like passivation behavior of binary Fe-Cr alloys, there remain outstanding questions regarding the compositional dependence of this behavior. In order to explore these issues, we examined the passivation behavior of short-range ordered (SRO) Fe-Cr alloys and compared this to that of their random solid solution counterpart. Our results reveal that for alloys containing between 12–18 at.% Cr, passivation in the SRO alloys is delayed and we attribute this to ordering effects on percolation behavior. Finally, we discuss some major outstanding questions regarding passivation in the Fe-Cr system and suggest that first-principles based calculations could make important contributions to our understanding of passivation in this system.

Original language	English (US)
Pages (from-to)	C830-C834
Journal	Journal of the Electrochemical Society
Volume	165
Issue number	11
DOIs	https://doi.org/10.1149/2.0871811jes
State	Published - 2018

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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title = "The effect of short-range order on passivation of Fe-Cr alloys",

abstract = "While it is well known that 12–13 at.% chromium is required for stainless-like passivation behavior of binary Fe-Cr alloys, there remain outstanding questions regarding the compositional dependence of this behavior. In order to explore these issues, we examined the passivation behavior of short-range ordered (SRO) Fe-Cr alloys and compared this to that of their random solid solution counterpart. Our results reveal that for alloys containing between 12–18 at.% Cr, passivation in the SRO alloys is delayed and we attribute this to ordering effects on percolation behavior. Finally, we discuss some major outstanding questions regarding passivation in the Fe-Cr system and suggest that first-principles based calculations could make important contributions to our understanding of passivation in this system.",

author = "Minglu Liu and Ashlee Aiello and Yusi Xie and Karl Sieradzki",

note = "Funding Information: The authors gratefully acknowledge support of this work by the National Science Foundation under award DMR-1708459. Publisher Copyright: {\textcopyright} 2018 The Electrochemical Society.",

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T1 - The effect of short-range order on passivation of Fe-Cr alloys

AU - Liu, Minglu

AU - Aiello, Ashlee

AU - Xie, Yusi

AU - Sieradzki, Karl

PY - 2018

Y1 - 2018

N2 - While it is well known that 12–13 at.% chromium is required for stainless-like passivation behavior of binary Fe-Cr alloys, there remain outstanding questions regarding the compositional dependence of this behavior. In order to explore these issues, we examined the passivation behavior of short-range ordered (SRO) Fe-Cr alloys and compared this to that of their random solid solution counterpart. Our results reveal that for alloys containing between 12–18 at.% Cr, passivation in the SRO alloys is delayed and we attribute this to ordering effects on percolation behavior. Finally, we discuss some major outstanding questions regarding passivation in the Fe-Cr system and suggest that first-principles based calculations could make important contributions to our understanding of passivation in this system.

AB - While it is well known that 12–13 at.% chromium is required for stainless-like passivation behavior of binary Fe-Cr alloys, there remain outstanding questions regarding the compositional dependence of this behavior. In order to explore these issues, we examined the passivation behavior of short-range ordered (SRO) Fe-Cr alloys and compared this to that of their random solid solution counterpart. Our results reveal that for alloys containing between 12–18 at.% Cr, passivation in the SRO alloys is delayed and we attribute this to ordering effects on percolation behavior. Finally, we discuss some major outstanding questions regarding passivation in the Fe-Cr system and suggest that first-principles based calculations could make important contributions to our understanding of passivation in this system.

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The effect of short-range order on passivation of Fe-Cr alloys

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