Al-21Ti-23Cr high-temperature protective coating on TiAl intermetallic compounds by RF magnetron sputtering
- KAIST, Taejon (Korea, Republic of). Dept. of Materials Science and Engineering
- Hyundai Electronics Industries Co. Ltd., Ichon (Korea, Republic of). Package Development Dept.
- Kumoh National Univ. of Technology, Kumi (Korea, Republic of). Dept. of Materials Science and Engineering
Ti-48Al specimens were coated with Al-21Ti-23Cr film at 200 W, 0.8 Pa and 573 K by RF magnetron sputtering. The oxidation behavior of the coated specimens was investigated through isothermal and cyclic oxidation tests, and the tensile deformation properties of the coated specimens were also investigated before and after oxidation. The isothermal and cyclic oxidation curves showed that the Al-21Ti-23Cr film was very effective in decreasing the oxidation rate of Ti-48Al. This excellent oxidation resistance is attributable to the formation of a protective Al{sub 2}O{sub 3} layer on the surface of the Al-21Ti-23Cr film. It was found from the results of the tensile test that the protective Al{sub 2}O{sub 3} layer on the surface of the Al-21Ti-23Cr film enabled the Ti-48Al to maintain its tensile properties in an oxidizing environment.
- Sponsoring Organization:
- Korea Science and Engineering Foundation (Korea, Republic of)
- OSTI ID:
- 571736
- Report Number(s):
- CONF-961202--
- Country of Publication:
- United States
- Language:
- English
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