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

被引：0
|
作者：
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
机构：
[1] University of Illinois,Department of Nuclear, Plasma, and Radiological Engineering
[2] University of Wisconsin-Madison,Department of Engineering Physics
[3] Brookhaven National Laboratory,Nuclear Science and Technology Department
[4] Argonne National Laboratory,X
来源：
Metallurgical and Materials Transactions A | 2019年 / 50卷
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摘要：
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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页码：1851 / 1861
页数：10
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