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Properties of oxide coating on the surface of ZrH1.8 prepared by microarc oxidation with different positive voltages

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Abstract

Zirconia coatings as hydrogen permeation barriers were formed on disk-type ZrH1.8 substrate specimens in phosphate solution system by microarc oxidation technique. Influence of positive voltage on hydrogen permeation barriers on the surface of zirconium hydride was investigated as the main factor. The thickness of total oxide layer increased from 42.5 to 55.0 μm the increase of positive voltage increasing from 325 up to 425 V. The permeation reduction factor (PRF) was observed under different voltages, which increased with the increasing positive voltages. The phase structure of oxide layer was monoclinic ZrO2 and tetragonal ZrO1.88. No reduction reaction occured in the process of hydrogen escaping, and it indicates that hydrogen permeation through oxide layer is restricted.

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Acknowledgments

This project was financially supported by the National Natural Science Foundation of China (No. 51164023) and Inner Mongolia Natural Science Foundation (No. 2009BS0801).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China

    Guo-Qing Yan, Wei-Dong Chen, Xue-Kui Zhong & Shu-Fang Yan

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  1. Guo-Qing Yan
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  2. Wei-Dong Chen
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  3. Xue-Kui Zhong
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  4. Shu-Fang Yan
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Correspondence to Guo-Qing Yan.

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Yan, GQ., Chen, WD., Zhong, XK. et al. Properties of oxide coating on the surface of ZrH1.8 prepared by microarc oxidation with different positive voltages. Rare Met. 32, 169–173 (2013). https://doi.org/10.1007/s12598-013-0028-y

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  • DOI: https://doi.org/10.1007/s12598-013-0028-y

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