Interface stability and microstructural evolution of the (Cr/CrN)(24)-coated zirconium alloy under different thermal shock temperatures

Xiang, Yang ¹Liu, Chunhai ¹Li, Zhuo ¹Liu, Hengquan ¹Yang, Jijun ²Yang, Hongyan ³Zhang, Ruiqian ³He, Linxin ⁴Liu, Jun ¹Long, Jianping ¹Feng, Jie¹

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作者信息

1. Chengdu Univ Technol
2. Sichuan Univ
3. Nucl Power Inst China
4. Sichuan Univ Sci & Engn
折叠

Abstract

Thermal shock resistance is highly important to the selection of practical accident tolerance fuel coatings (ATFCs). The performance of three coatings (Cr, CrN and (Cr/CrN)(24)) prepared by radio frequency magnetron sputtering (RFMS) were compared in thermal shock tests at 900- 1200 degrees C. The interface stability, microstructural evolution and oxidation behaviors of the (Cr/CrN)(24) multilayer coatings were systematically investigated. The results indicate that the thinning of the Cr2O3 layer is related to the evaporation of volatile CrO2(OH)(2) during quenching in boiling water. The coatings exhibited severe performance degradation at 1200 degrees C mainly because of significant mutual diffusion of Cr and Zr, which caused oxygen to diffuse into the substrates and form ZrO2. The relationship between the microstructure evolution and element diffusion is analyzed in detail.

Key words

Thermal shock resistance/RF magnetron sputtering/Microstructure evolution/(Cr/CrN)(24) multilayer coatings/NUCLEAR-FUEL/MULTILAYER COATINGS/OXIDATION BEHAVIOR/CORROSION/RESISTANCE/DIFFUSION/STRESSES/VAPOR/TUBES

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出版年

2022

Surface & Coatings Technology

ISTP

ISSN：0257-8972

被引量8

参考文献量43

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