Fabrication and hydrogen permeation resistance of dense CrN coatings

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外文摘要：© 2022Hydrogen embrittlement has become a hot research topic due to the rapid development of hydrogen energy and coating technology is regarded as the most efficient method to mitigate hydrogen embrittlement. However, the grain gaps in coatings frequently serve as paths for hydrogen permeation thus decreasing the protecting effects. In this work, ion bombardment is performed during magnetron sputtering deposition of dense CrN coatings to decrease the formation of grain gaps. The compactness of the CrN coatings is improved by disrupting the growth of grains using energetic ion bombardment. Hydrogen permeation tests reveal that the apparent hydrogen diffusion coefficient and hydrogen permeability of the dense CrN coating 52.6 and 24.1 times less than those of the unprotected substrate. The tensile test also reveals excellent hydrogen embrittlement resistance compared to the X70 substrate and conventional coatings.

外文关键词：

CoatingsGrain gapsHydrogen embrittlementIon bombardment

作者：

Liu L.、Ruan Q.、Xiao S.、Huang C.、Wu Y.、Fu R.K.Y.、Chu P.K.、Meng X.

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作者单位：

Department of Physics City University of Hong Kong

Institute of Safety Science & Engineering South China University of Technology

出版年：

2022

DOI：

10.1016/j.surfcoat.2022.128326

Surface & Coatings Technology

ISTP

ISSN：0257-8972

年,卷(期)：2022.437

参考文献量34