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Microstructure and oxidation behavior of CrCN/TiSiCN nano-multilayer coatings on Zircaloy in high-temperature steam.

Authors :
Li, Hao
Ma, Dayan
Wang, Hongbo
Yun, Di
Hao, Zhe
Deng, Junkai
Zhang, Ruiqian
Li, Zhendong
Source :
Corrosion Science. Feb2023, Vol. 211, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

CrCN/TiSiCN nano-multilayer coatings with different C/N composition ratios were prepared on Zircaloy by hybrid multi-arc ion plating and magnetron sputtering technique, and the microstructures and oxidation behaviors of the coatings in 1000 °C steam were investigated. At the C/N ratio of 1.0, the coating structure changed from a quasi-bicrystalline layer periodic arrangement to a crystalline/amorphous layer arrangement. Increasing C/N ratio inhibited the generation and mobility of N 2 bubbles in the coatings during oxidation, avoiding crack generation and coating flaking. The coating with C/N of 1.0 exhibited optimal high-temperature oxidation resistance. Moreover, the oxidation mechanisms of CrCN/TiSiCN nano-multilayer coatings were discussed. • CrCN/TiSiCN coatings with multilayer structure were deposited on Zircaloy. • The structure of as-deposited coatings changes from bicrystalline layer to crystal/amorphous layer. • Diffusion and aggregation of N 2 bubbles are suppressed by the interface of the multilayer structure. • The reasons for the difference in oxidation behavior of coatings at 1000 °C were analysed. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0010938X
Volume :
211
Database :
Academic Search Index
Journal :
Corrosion Science
Publication Type :
Academic Journal
Accession number :
161059853
Full Text :
https://doi.org/10.1016/j.corsci.2022.110883