Performance of iron-chromium-aluminum alloy surface coatings on Zircaloy 2 under high-temperature steam and normal BWR operating conditions
Performance of iron-chromium-aluminum alloy surface coatings on Zircaloy 2 under high-temperature steam and normal BWR operating conditions
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DOI：
10.1016/j.jnucmat.2015.11.037
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发表时间：
2016-03
影响因子：
3.1
通讯作者：
W. Zhong;P. Mouche;Xiaochun Han;B. Heuser;Kiran K. Mandapaka;G. Was
中科院分区：
文献类型：
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作者：
W. Zhong;P. Mouche;Xiaochun Han;B. Heuser;Kiran K. Mandapaka;G. Was
通过磁控溅射在 Zircoy 2 (Zy2) 和氧化钇稳定氧化锆 (YSZ) 上沉积的铁铬铝 (FeCrAl) 涂层已在高温蒸汽中进行了氧化增重测试。此外，在代表沸水反应堆 (BWR) 环境的压力-温度-溶解氧冷却剂条件下，对 FeCrAl 涂层的 Zy2 试样进行了高压釜测试。四种不同的 FeCrAl 成分已在 700 °C 蒸汽中进行了测试；促进氧化铝形成的组合物抑制了下面的Zy2的氧化。通过元素深度分析对 FeCrAl 涂层 Zy2 上氧化铝的抛物线生长动力学进行量化。在正常 BWR 操作条件（288 °C，9.5 MPa，正常水化学）下进行长达 20 天的高压釜测试表明，与同时暴露于相同环境的未涂层 Zy2 相比，可观察到重量增加。然而，没有观察到 FeCrAl 薄膜降解。 FeCrAl-YSZ 系统可解决二元 Fe-Zr 中的 900 °C 共晶问题。
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.