Effect of Cr and Y2O3 on the oxidation behavior of Co-based oxide dispersion strengthened superalloys at 900 °C

Hao Yu, Shigeharu Ukai, Shigenari Hayashi, Naoko Hori Oono

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16 Citations (Scopus)

Abstract

In order to study the effect of Cr and Y2O3 addition on the oxidation behavior of novel Co-20Cr-10Al (wt.%) oxide dispersion strengthened (ODS) superalloys, an isothermal oxidation test was carried out at 900 °C in air. The addition of Cr altered the oxide scale from the multilayered scale with an external Co oxide/CoAl2O4 and an inner Al2O3 to a single Al2O3 scale. Y2O3 addition increased oxidation mass gain slightly but improved spallation resistance of the external Al2O3 scale.

Original languageEnglish
Pages (from-to)147-156
Number of pages10
JournalCorrosion Science
Volume127
DOIs
Publication statusPublished - 2017 Oct
Externally publishedYes

Keywords

  • A. Alumina
  • A. Cobalt
  • B. EPMA
  • C. Oxidation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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