Oxidation behavior and Cr-Zr diffusion of Cr coatings prepared by atmospheric plasma spraying on zircaloy-4 cladding in steam at 1300?C

被引：44
作者：
Li, Qing [1 ]
Song, Peng [1 ]
Zhang, Ruiqian [2 ]
Li, Zhenhua [1 ]
Wang, Yu [2 ]
Du, Peinan [2 ]
Lu, Jiansheng [1 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Peoples R China
[2] Nucl Power Inst China, Sci & Technol Reactor Fuel & Mat Lab, Chengdu 610213, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 203卷
基金：
中国国家自然科学基金;
关键词：
Zircaloy-4; Cr coatings; APS; Oxidation; Diffusion; ACCIDENT-TOLERANT FUEL; HIGH-TEMPERATURE OXIDATION; CHROMIUM-BASED COATINGS; COATED ZIRCALOY-4; WATER-VAPOR; ZIRCONIUM ALLOYS; PROTECTION; RESISTANCE; CORROSION; HYDROGEN;
D O I：
10.1016/j.corsci.2022.110378
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To improve the high-temperature steam oxidation resistance of zircaloy-4 substrate, thick Cr coatings were successfully prepared on zircaloy-4 via atmospheric plasma spraying. The microstructure and oxidation behavior of Cr coatings on the zircaloy-4 in steam at 1300 degrees C were studied systematically. The Cr coatings showed improved steam oxidation over zircaloy up to 1300 degrees C. The microstructure evolution, Cr-Zr diffusion, and bubble formation were analyzed and discussed. Leaf-like Cr2O3 whiskers were formed on the surfaces of the Cr coatings. Zr-rich channels in the Cr coatings near the Cr-Zr interface can provide a diffusion path for oxygen to reach the zircaloy.
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页数：11
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