Dense-film preparation of zirconium oxide by self-oxidation in air

Rio Takemura, Kiyoto Shin-mura, Kazuya Sasaki, Eiki Niwa, Masatoshi Kondo

Research output: Contribution to journalArticlepeer-review

Abstract

For the formation of a dense oxide film for use as an anticorrosion film with self-diagnosis and self-healing functions on the surface of structural materials, liquid blankets, and liquid divertors of thermonuclear fusion reactors, we investigated the self-oxidation of zirconium (Zr) at 500°C in air. The microstructure, composition (O/Zr ratio), crystal structure, and formation mechanism of the film were clarified through scanning electron microscopy, energy dispersive X-ray analysis, and X-ray diffraction analysis. It was demonstrated that the dense oxide film could be prepared, and its film exhibited a continuous and layered structure that consists of multiple phases. The outermost surface was unstrained monoclinic ZrO2. The growth of the oxide film adheres to a parabolic rate law.

Original languageEnglish
Article number112793
JournalFusion Engineering and Design
Volume171
DOIs
Publication statusPublished - Oct 2021

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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