Performance of iron-chromium-aluminum alloy surface coatings on Zircaloy 2 under high-temperature steam and normal BWR operating conditions

Weicheng Zhong; Peter A. Mouche; Xiaochun Han; Brent J. Heuser; Kiran K. Mandapaka; Gary S. Was

doi:10.1016/j.jnucmat.2015.11.037

Performance of iron-chromium-aluminum alloy surface coatings on Zircaloy 2 under high-temperature steam and normal BWR operating conditions

Weicheng Zhong, Peter A. Mouche, Xiaochun Han, Brent J. Heuser, Kiran K. Mandapaka, Gary S. Was

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

124 Scopus citations

Abstract

Iron-chromium-aluminum (FeCrAl) coatings deposited on Zircaloy 2 (Zy2) and yttria-stabilized zirconia (YSZ) by magnetron sputtering have been tested with respect to oxidation weight gain in high-temperature steam. In addition, autoclave testing of FeCrAl-coated Zy2 coupons under pressure-temperature-dissolved oxygen coolant conditions representative of a boiling water reactor (BWR) environment has been performed. Four different FeCrAl compositions have been tested in 700 °C steam; compositions that promote alumina formation inhibited oxidation of the underlying Zy2. Parabolic growth kinetics of alumina on FeCrAl-coated Zy2 is quantified via elemental depth profiling. Autoclave testing under normal BWR operating conditions (288 °C, 9.5 MPa with normal water chemistry) up to 20 days demonstrates observable weight gain over uncoated Zy2 simultaneously exposed to the same environment. However, no FeCrAl film degradation was observed. The 900 °C eutectic in binary Fe-Zr is addressed with the FeCrAl-YSZ system.

Original language	English
Pages (from-to)	327-338
Number of pages	12
Journal	Journal of Nuclear Materials
Volume	470
DOIs	https://doi.org/10.1016/j.jnucmat.2015.11.037
State	Published - Mar 1 2016
Externally published	Yes

Funding

This work was performed with support from the US Department of Energy Nuclear Energy University Programs Integrated Research Project under contract number IRP-12-4728 . In addition, this work was carried out in part in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois, which are partially supported by the US Department of Energy under Grants DE-FG02-07ER46453 and DE-FG02-07ER46471 . We are grateful to Y. Miao (UIUC) for help with SEM, STEM, and EDS sample preparation and analysis. In addition, assistance of R. Haasch (UIUC), J. Mabon (UIUC), H. Zhou (UIUC), and M. Sardela (UIUC) with AES, SEM, STEM, and XRD analysis, respectively, is gratefully acknowledged.

Keywords

Alumina
Corrosion
FeCrAl
LWR cladding
Oxidation
Protective coatings

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10.1016/j.jnucmat.2015.11.037

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title = "Performance of iron-chromium-aluminum alloy surface coatings on Zircaloy 2 under high-temperature steam and normal BWR operating conditions",

abstract = "Iron-chromium-aluminum (FeCrAl) coatings deposited on Zircaloy 2 (Zy2) and yttria-stabilized zirconia (YSZ) by magnetron sputtering have been tested with respect to oxidation weight gain in high-temperature steam. In addition, autoclave testing of FeCrAl-coated Zy2 coupons under pressure-temperature-dissolved oxygen coolant conditions representative of a boiling water reactor (BWR) environment has been performed. Four different FeCrAl compositions have been tested in 700 °C steam; compositions that promote alumina formation inhibited oxidation of the underlying Zy2. Parabolic growth kinetics of alumina on FeCrAl-coated Zy2 is quantified via elemental depth profiling. Autoclave testing under normal BWR operating conditions (288 °C, 9.5 MPa with normal water chemistry) up to 20 days demonstrates observable weight gain over uncoated Zy2 simultaneously exposed to the same environment. However, no FeCrAl film degradation was observed. The 900 °C eutectic in binary Fe-Zr is addressed with the FeCrAl-YSZ system.",

keywords = "Alumina, Corrosion, FeCrAl, LWR cladding, Oxidation, Protective coatings",

author = "Weicheng Zhong and Mouche, {Peter A.} and Xiaochun Han and Heuser, {Brent J.} and Mandapaka, {Kiran K.} and Was, {Gary S.}",

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AU - Zhong, Weicheng

AU - Mouche, Peter A.

AU - Han, Xiaochun

AU - Heuser, Brent J.

AU - Mandapaka, Kiran K.

AU - Was, Gary S.

PY - 2016/3/1

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N2 - Iron-chromium-aluminum (FeCrAl) coatings deposited on Zircaloy 2 (Zy2) and yttria-stabilized zirconia (YSZ) by magnetron sputtering have been tested with respect to oxidation weight gain in high-temperature steam. In addition, autoclave testing of FeCrAl-coated Zy2 coupons under pressure-temperature-dissolved oxygen coolant conditions representative of a boiling water reactor (BWR) environment has been performed. Four different FeCrAl compositions have been tested in 700 °C steam; compositions that promote alumina formation inhibited oxidation of the underlying Zy2. Parabolic growth kinetics of alumina on FeCrAl-coated Zy2 is quantified via elemental depth profiling. Autoclave testing under normal BWR operating conditions (288 °C, 9.5 MPa with normal water chemistry) up to 20 days demonstrates observable weight gain over uncoated Zy2 simultaneously exposed to the same environment. However, no FeCrAl film degradation was observed. The 900 °C eutectic in binary Fe-Zr is addressed with the FeCrAl-YSZ system.

AB - Iron-chromium-aluminum (FeCrAl) coatings deposited on Zircaloy 2 (Zy2) and yttria-stabilized zirconia (YSZ) by magnetron sputtering have been tested with respect to oxidation weight gain in high-temperature steam. In addition, autoclave testing of FeCrAl-coated Zy2 coupons under pressure-temperature-dissolved oxygen coolant conditions representative of a boiling water reactor (BWR) environment has been performed. Four different FeCrAl compositions have been tested in 700 °C steam; compositions that promote alumina formation inhibited oxidation of the underlying Zy2. Parabolic growth kinetics of alumina on FeCrAl-coated Zy2 is quantified via elemental depth profiling. Autoclave testing under normal BWR operating conditions (288 °C, 9.5 MPa with normal water chemistry) up to 20 days demonstrates observable weight gain over uncoated Zy2 simultaneously exposed to the same environment. However, no FeCrAl film degradation was observed. The 900 °C eutectic in binary Fe-Zr is addressed with the FeCrAl-YSZ system.

KW - Alumina

KW - Corrosion

KW - FeCrAl

KW - LWR cladding

KW - Oxidation

KW - Protective coatings

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JO - Journal of Nuclear Materials

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ER -

Performance of iron-chromium-aluminum alloy surface coatings on Zircaloy 2 under high-temperature steam and normal BWR operating conditions

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