Effect of Sn addition on the high-temperature oxidation behavior of high Nb-containing TiAl alloys

Yu Pan, Xin Lu, Muhammad D. Hayat, Fang Yang, Cheng Cheng Liu, Yang Li, Xing Yu Li, Wei Xu, Xuan Hui Qu, Peng Cao

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The effect of Sn addition on the oxidation behavior of high-Nb containing TiAl alloys was investigated with isothermal oxidation tests conducted in static air at 1000 °C. Sn addition can improve the high-temperature oxidation resistance of TiAl alloys by forming a protective Ti3Sn layer to diminish the inward oxygen diffusion. Moreover, the generated Al2O3 oxide pegs provide a mechanical locking to enhance the spallation resistance. The alloy containing 3 at.% Sn exhibits superior oxidation resistance, with no spallation occurring. The lowest mass gain after being oxidized for 100 h was 3.29 mg/cm2, which is 42.1 % lower than the Sn-free alloy.

Original languageEnglish
Article number108449
JournalCorrosion Science
Volume166
DOIs
Publication statusPublished - 2020 Apr 15
Externally publishedYes

Keywords

  • EPMA
  • High-temperature oxidation
  • Sn addition
  • TEM
  • TiAl-based alloys

ASJC Scopus subject areas

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

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