Microstructural Studies of Fluorine-Implanted Titanium Aluminides for Enhanced Environmental Durability

R.A. Yankov, A. Kolitsch, J. von Borany, F. Munnik, S. Gemming, A. Alexewicz, H. Bracht, H. Rösner, A. Donchev, M. Schütze

Analysis data detailing the microstructure of fluorine-implanted γ-TiAl alloys are presented. Correlations are done among the shape of the F implant profiles, the F dose, and the quality of the resulting oxide scale after high-temperature exposure to air. It is shown that good oxidation protection is associated with Gaussian-type as-implanted F profiles coupled with optimal F doses over a narrow window of about 5.0–9.0 × 1017 cm−2.

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