Dissolution of Intermetallic Second-Phase Particles in Zircaloy-2 in High-Temperature Steam

Weicheng Zhong; Xiang Liu; Peter A. Mouche; Jun Li Lin; Donghee Park; Mohamed S. Elbakhshwan; Simerjeet K. Gill; Yang Ren; James F. Stubbins; Brent J. Heuser

doi:10.1007/s11661-018-5090-5

Dissolution of Intermetallic Second-Phase Particles in Zircaloy-2 in High-Temperature Steam

Weicheng Zhong
, Xiang Liu
, Peter A. Mouche
, Jun Li Lin
, Donghee Park
, Mohamed S. Elbakhshwan
, Simerjeet K. Gill
, Yang Ren
, James F. Stubbins
, Brent J. Heuser

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

Abstract

The stability of intermetallic second-phase particles (SPPs) in coated Zircaloy-2 was studied in 700 °C steam environments up to 20 hours. Hydrogen generated from high-temperature steam oxidation of uncoated Zr-induced δ-hydrides formation in the Zircaloy matrix. Synchrotron XRD demonstrated that longer exposure times increased hydride peak intensity and decreased intermetallic SPPs’ peak intensity. Cross-sectional SEM analysis verified the intermetallic SPPs’ volume fraction reduction. The size distribution of intermetallic SPPs was characterized and larger particles were dissolved at longer oxidation time. A correlation between the hydrogen concentration and the volume fraction of intermetallic SPPs at 700 °C steam environment was found, with the volume fraction of SPPs decreasing as hydrogen concentration increases.

Original language	English
Pages (from-to)	1851-1861
Number of pages	11
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	50
Issue number	4
DOIs	https://doi.org/10.1007/s11661-018-5090-5
State	Published - Apr 15 2019
Externally published	Yes

Funding

This study was supported by the US Department of Energy Nuclear Energy University Programs Integrated Research Project under Contract Number IRP-12-4728; supported by the University of Illinois Campus Research Board under Award Number RB17006; and supported by Laboratory Directed Research and Development (LDRD) Program (Project No. 13-027) at BNL. The microanalysis was performed 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. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The authors are grateful to Richard Spence (APS) for his help with synchrotron XRD measurement.

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Zhong, W., Liu, X., Mouche, P. A., Lin, J. L., Park, D., Elbakhshwan, M. S., Gill, S. K., Ren, Y., Stubbins, J. F., & Heuser, B. J. (2019). Dissolution of Intermetallic Second-Phase Particles in Zircaloy-2 in High-Temperature Steam. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 50(4), 1851-1861. https://doi.org/10.1007/s11661-018-5090-5

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title = "Dissolution of Intermetallic Second-Phase Particles in Zircaloy-2 in High-Temperature Steam",

abstract = "The stability of intermetallic second-phase particles (SPPs) in coated Zircaloy-2 was studied in 700 °C steam environments up to 20 hours. Hydrogen generated from high-temperature steam oxidation of uncoated Zr-induced δ-hydrides formation in the Zircaloy matrix. Synchrotron XRD demonstrated that longer exposure times increased hydride peak intensity and decreased intermetallic SPPs{\textquoteright} peak intensity. Cross-sectional SEM analysis verified the intermetallic SPPs{\textquoteright} volume fraction reduction. The size distribution of intermetallic SPPs was characterized and larger particles were dissolved at longer oxidation time. A correlation between the hydrogen concentration and the volume fraction of intermetallic SPPs at 700 °C steam environment was found, with the volume fraction of SPPs decreasing as hydrogen concentration increases.",

author = "Weicheng Zhong and Xiang Liu and Mouche, \{Peter A.\} and Lin, \{Jun Li\} and Donghee Park and Elbakhshwan, \{Mohamed S.\} and Gill, \{Simerjeet K.\} and Yang Ren and Stubbins, \{James F.\} and Heuser, \{Brent J.\}",

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doi = "10.1007/s11661-018-5090-5",

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AU - Zhong, Weicheng

AU - Liu, Xiang

AU - Mouche, Peter A.

AU - Lin, Jun Li

AU - Park, Donghee

AU - Elbakhshwan, Mohamed S.

AU - Gill, Simerjeet K.

AU - Ren, Yang

AU - Stubbins, James F.

AU - Heuser, Brent J.

PY - 2019/4/15

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N2 - The stability of intermetallic second-phase particles (SPPs) in coated Zircaloy-2 was studied in 700 °C steam environments up to 20 hours. Hydrogen generated from high-temperature steam oxidation of uncoated Zr-induced δ-hydrides formation in the Zircaloy matrix. Synchrotron XRD demonstrated that longer exposure times increased hydride peak intensity and decreased intermetallic SPPs’ peak intensity. Cross-sectional SEM analysis verified the intermetallic SPPs’ volume fraction reduction. The size distribution of intermetallic SPPs was characterized and larger particles were dissolved at longer oxidation time. A correlation between the hydrogen concentration and the volume fraction of intermetallic SPPs at 700 °C steam environment was found, with the volume fraction of SPPs decreasing as hydrogen concentration increases.

AB - The stability of intermetallic second-phase particles (SPPs) in coated Zircaloy-2 was studied in 700 °C steam environments up to 20 hours. Hydrogen generated from high-temperature steam oxidation of uncoated Zr-induced δ-hydrides formation in the Zircaloy matrix. Synchrotron XRD demonstrated that longer exposure times increased hydride peak intensity and decreased intermetallic SPPs’ peak intensity. Cross-sectional SEM analysis verified the intermetallic SPPs’ volume fraction reduction. The size distribution of intermetallic SPPs was characterized and larger particles were dissolved at longer oxidation time. A correlation between the hydrogen concentration and the volume fraction of intermetallic SPPs at 700 °C steam environment was found, with the volume fraction of SPPs decreasing as hydrogen concentration increases.

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ER -

Dissolution of Intermetallic Second-Phase Particles in Zircaloy-2 in High-Temperature Steam

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