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Ceramic Coatings Formed on the Surface of ZrH1.8 by Micro-arc Oxidation in Aluminate System

  • Pengfei Zhang
  • Shufang Yan
  • Shijiang Li
  • Yanhua Geng
  • Weidong Chen
Conference paper
Part of the Springer Proceedings in Energy book series (SPE)

Abstract

The ZrO2–Al2O3 ceramic layer was prepared by the micro-arc oxidation with NaAlO2–NaOH–Na2EDTA as electrolyte system under the constant voltage mode. The surface and cross-sectional morphologies, phase structures and chemical composition of the coatings were characterized by Field effect scanning election microscopy (FE-SEM), X-ray diffraction (XRD) and energy disperse spectroscopy (EDS). The results show that in Aluminate System under the applied conditions can obtain about 132 μm ceramic layer, the ceramic layer section is compact and uniform, the growth rate is about 13.2 μm/min. The EDS result shows that the ceramic layer contains Zirconium (Zr), Aluminum (Al) and oxygen (O), and the ceramic layer is mainly composed of aluminum oxide (α-Al2O3), monoclinic zirconia (m-ZrO2), tetragonal zirconia (t-ZrO2) and cubic zirconia (c-ZrO2). The dense coating obviously enhances the hydrogen anti-permeation effects that the Permeation Reduction Factor value is improved about 16 times in contrast with the uncoated ZrH1.8.

Keywords

Zirconium hydride Micro-arc oxidation Aluminate Hydrogen permeation barrier 

Notes

Acknowledgements

This project was financially supported by the National Natural Science Foundation (No. 51164023 and 51364026), the Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region (No. NJYT-13-B10).

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Pengfei Zhang
    • 1
  • Shufang Yan
    • 1
  • Shijiang Li
    • 1
  • Yanhua Geng
    • 1
  • Weidong Chen
    • 1
  1. 1.College of Materials Science and EngineeringInner Mongolia University of TechnologyHohhotChina

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