Response of Cr and Cr-Al coatings on Zircaloy-2 to high temperature steam

Weicheng Zhong; Peter A. Mouche; Brent J. Heuser

doi:10.1016/j.jnucmat.2017.10.021

Response of Cr and Cr-Al coatings on Zircaloy-2 to high temperature steam

Weicheng Zhong, Peter A. Mouche, Brent J. Heuser

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

93 Scopus citations

Abstract

The oxidation behavior of chromium (Cr) and chromium-aluminum (CrAl) coatings with various compositions deposited on Zircaloy-2 to 700 °C high-temperature steam (HTS) exposure has been investigated. CrAl coatings with higher Al compositions demonstrate lower oxidation weight gain. A layer of γ-alumina developed on the CrAl coatings with Al composition over 43 at%, while Al₂O₃ and Cr₂O₃ developed on CrAl coatings with Al composition below 33 at%. Oxidation of Zircaloy-2 substrate was inhibited by the 1um coatings to 20 h HTS exposure. Coating constituent elements diffused into the substrate and formed intermetallic phases with the Zircaloy substrate. Thicker layers of intermetallic phases developed on the coatings with higher Al composition. The intermetallic phases included Fe and Ni, indicating the dissolution of second phase particles (SPPs) during HTS exposure.

Original language	English
Pages (from-to)	137-148
Number of pages	12
Journal	Journal of Nuclear Materials
Volume	498
DOIs	https://doi.org/10.1016/j.jnucmat.2017.10.021
State	Published - Jan 2018
Externally published	Yes

Funding

This work was supported by the US Department of Energy Nuclear Energy University Programs Integrated Research Project under contract number IRP-12-4728 . In addition, the microanalysis was performed mainly in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois, which are partially supported by the U.S. Department of Energy under Grants DE-FG02-07ER46453 and DE-FG02-07ER46471 .

Funders	Funder number
US Department of Energy Nuclear Energy University Programs Integrated Research Project	IRP-12-4728
U.S. Department of Energy	DE-FG02-07ER46453, DE-FG02-07ER46471

Keywords

Chromium coating
Chromium-aluminum coatings
Oxidation
Second phase particle
Zircaloy

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10.1016/j.jnucmat.2017.10.021

Cite this

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title = "Response of Cr and Cr-Al coatings on Zircaloy-2 to high temperature steam",

abstract = "The oxidation behavior of chromium (Cr) and chromium-aluminum (CrAl) coatings with various compositions deposited on Zircaloy-2 to 700 °C high-temperature steam (HTS) exposure has been investigated. CrAl coatings with higher Al compositions demonstrate lower oxidation weight gain. A layer of γ-alumina developed on the CrAl coatings with Al composition over 43 at%, while Al2O3 and Cr2O3 developed on CrAl coatings with Al composition below 33 at%. Oxidation of Zircaloy-2 substrate was inhibited by the 1um coatings to 20 h HTS exposure. Coating constituent elements diffused into the substrate and formed intermetallic phases with the Zircaloy substrate. Thicker layers of intermetallic phases developed on the coatings with higher Al composition. The intermetallic phases included Fe and Ni, indicating the dissolution of second phase particles (SPPs) during HTS exposure.",

keywords = "Chromium coating, Chromium-aluminum coatings, Oxidation, Second phase particle, Zircaloy",

author = "Weicheng Zhong and Mouche, {Peter A.} and Heuser, {Brent J.}",

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year = "2018",

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doi = "10.1016/j.jnucmat.2017.10.021",

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T1 - Response of Cr and Cr-Al coatings on Zircaloy-2 to high temperature steam

AU - Zhong, Weicheng

AU - Mouche, Peter A.

AU - Heuser, Brent J.

PY - 2018/1

Y1 - 2018/1

N2 - The oxidation behavior of chromium (Cr) and chromium-aluminum (CrAl) coatings with various compositions deposited on Zircaloy-2 to 700 °C high-temperature steam (HTS) exposure has been investigated. CrAl coatings with higher Al compositions demonstrate lower oxidation weight gain. A layer of γ-alumina developed on the CrAl coatings with Al composition over 43 at%, while Al2O3 and Cr2O3 developed on CrAl coatings with Al composition below 33 at%. Oxidation of Zircaloy-2 substrate was inhibited by the 1um coatings to 20 h HTS exposure. Coating constituent elements diffused into the substrate and formed intermetallic phases with the Zircaloy substrate. Thicker layers of intermetallic phases developed on the coatings with higher Al composition. The intermetallic phases included Fe and Ni, indicating the dissolution of second phase particles (SPPs) during HTS exposure.

AB - The oxidation behavior of chromium (Cr) and chromium-aluminum (CrAl) coatings with various compositions deposited on Zircaloy-2 to 700 °C high-temperature steam (HTS) exposure has been investigated. CrAl coatings with higher Al compositions demonstrate lower oxidation weight gain. A layer of γ-alumina developed on the CrAl coatings with Al composition over 43 at%, while Al2O3 and Cr2O3 developed on CrAl coatings with Al composition below 33 at%. Oxidation of Zircaloy-2 substrate was inhibited by the 1um coatings to 20 h HTS exposure. Coating constituent elements diffused into the substrate and formed intermetallic phases with the Zircaloy substrate. Thicker layers of intermetallic phases developed on the coatings with higher Al composition. The intermetallic phases included Fe and Ni, indicating the dissolution of second phase particles (SPPs) during HTS exposure.

KW - Chromium coating

KW - Chromium-aluminum coatings

KW - Oxidation

KW - Second phase particle

KW - Zircaloy

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U2 - 10.1016/j.jnucmat.2017.10.021

DO - 10.1016/j.jnucmat.2017.10.021

M3 - Article

AN - SCOPUS:85031752226

SN - 0022-3115

VL - 498

SP - 137

EP - 148

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Response of Cr and Cr-Al coatings on Zircaloy-2 to high temperature steam

Abstract

Funding

Keywords

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