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 language | English |
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Pages (from-to) | 182-187 |
Number of pages | 6 |
Journal | Materials Science and Engineering: A |
Volume | 307 |
Issue number | 1-2 |
DOIs | |
State | Published - Jun 15 2001 |
Externally published | Yes |
Funding
The National Natural Science Foundation of China is acknowledged for financial support.
Keywords
- Coating
- Oxidation
- TiAl