Materials & Design (Oct 2024)

Corrosion behavior of Si-18at%Y alloy in air/water-oxygen environment

  • Jingxin Li,
  • Yongsheng Liu,
  • Fang He,
  • Fan Zhang,
  • Binghui Zhang,
  • Jing Wang,
  • Yejie Cao,
  • Nan Chai

Journal volume & issue
Vol. 246
p. 113352

Abstract

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This work aimed to investigate the corrosion behavior of Si-18at%Y alloys in air oxidation and water-oxygen corrosion environments. The objective was to understand how different times, temperatures, and the presence or absence of water vapor affected the distribution and transformation of the alloy’s phases. The results revealed that extended duration facilitates growth of yttrium silicate, while higher temperature promotes stable phase transformation. The distribution and type of yttrium silicate are influenced by the presence of SiO2. At lower temperatures, water vapor facilitated the formation of SiO2, whereas at higher temperatures, it depleted SiO2 and inhibited the generation of yttrium silicate.

Keywords