Gamma titanium aluminide (gamma-TiAl or gamma) alloys are being developed for application in aircraft gas turbine engines. Potential applications include: components in the compressor, turbine, and exhaust sections of the engine. Advanced titanium aluminide intermetallics are being developed for applications where service temperatures are in the range 650 deg C to 900 deg C. The usefulness of these alloys may be limited by oxidation and by oxygen-induced embrittlement. Successful application of these materials requires that the kinetics of oxidation for the base alloys are parabolic and that coatings are available for environmental protection of alpha-2 alloys above 700 deg C and gamma alloys above 815 deg C. Results of an ongoing program to meet these requirements for gamma alloys are presented.
Protective coatings for titanium aluminide intermetallics
Schutzbeschichtungen für intermetallische Titan-Aluminium-Verbindungen
Science and Technology, Titanium, World Titanium Conference, 7 ; 3 ; 1971-1978
1993
8 Seiten, 9 Bilder, 7 Quellen
Conference paper
English
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