Effect of Ti-Al-Cr coatings on the high temperature oxidation behavior of TiAl alloys

Chungen Zhou, Ying Yang, Shengkai Gong, Huibin Xu

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

The high temperature oxidation behavior of TiAl alloys coated with Ti-Al-Cr alloys using magnetron sputtering method was studied. The results showed that Ti-Al-Cr coatings improved the oxidation resistance of TiAl alloys. The weight gains at 950°C for Ti-Al-Cr coatings are more than those at 1000°C. Oxide formed on the surface of Ti-50Al-15Cr coating after oxidation consisted of A12O3, whereas oxide formed on the surface of Ti-50Al-10Cr coating after oxidation is composed of a mixture of a large portion of A12O3 and a small portion of TiO2. The effect of Ti-Al-Cr coatings on the improvement of oxidation resistance of TiAl alloys results from thermodynamic and kinetics factors contributing to Cr effect.

Original languageEnglish
Pages (from-to)182-187
Number of pages6
JournalMaterials Science and Engineering: A
Volume307
Issue number1-2
DOIs
StatePublished - Jun 15 2001
Externally publishedYes

Funding

The National Natural Science Foundation of China is acknowledged for financial support.

Keywords

  • Coating
  • Oxidation
  • TiAl

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