Comprehensive investigation of the role of Nb on the oxidation kinetics of Zr-Nb alloys
Comprehensive investigation of the role of Nb on the oxidation kinetics of Zr-Nb alloys
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DOI：
10.1016/j.corsci.2019.04.017
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发表时间：
2019-07-15
影响因子：
8.3
通讯作者：
Couet, Adrien
中科院分区：
文献类型：
--
作者：
Moorehead, Michael;Yu, Zefeng;Couet, Adrien
锆合金的水侧腐蚀是目前压水反应堆（PWR）系统中燃料元件寿命下降的主要原因。如今，压水堆使用锆铌燃料包壳，旨在限制氧化和氢吸收。然而，Zr-Nb合金的氧化动力学可根据Nb含量和分布而显著变化，即使在相同组成但不同热处理的合金中也是如此。为了阐明Nb对Zr-Nb氧化动力学的作用，并提高对Zr-Nb腐蚀的基本理解，纳米束X射线吸收近边光谱（XANES），透射电子显微镜（TEM）和耦合电流电荷补偿（C4）模型的应用已经一致进行。
Waterside corrosion of zirconium alloys is currently the life-limiting degradation mechanism of fuel elements in pressurized-water reactor (PWR) systems. Today, PWRs use Zr-Nb fuel cladding designed to limit oxidation and hydrogen pickup. However, oxidation kinetics of Zr-Nb alloys can vary substantially depending on the Nb content and distribution, even in alloys of the same composition but different heat treatments. To elucidate the role of Nb on Zr-Nb oxidation kinetics and improve the fundamental understanding of Zr-Nb corrosion, nano-beam X-ray absorption near-edge spectroscopy (XANES), transmission electron microscopy (TEM), and application of the Coupled-Current Charge-Compensation (C4) Model have been performed in concert.