Investigation of the Fluorine Microalloying Effect in the Oxidation of TiAl at 900°C in Air

Springer Science and Business Media LLC - Tập 59 - Trang 183-200 - 2003
H.-E. Zschau1, V. Gauthier1, G. Schumacher1, F. Dettenwanger1, M. Schütze1, H. Baumann2, K. Bethge3, M. Graham4
1Karl Winnacker Institut der Dechema e.V., Frankfurt am Main, Germany
2Institut für Kernphysik der Johann-Wolfgang-Goethe-Universität Frankfurt am Main, Germany
3Institut für Kernphysik der Johann Wolfgang Goethe-Universität Frankfurt am Main, Germany
4National Research Council Canada, Institute for Microstructural Sciences, Ottawa, Canada

Tóm tắt

High-temperature oxidation resistance of gamma titanium aluminides can be achieved by the formation of a continuous scale of slowly growing Al2O3. The formation of such a scale was favored by the addition of small amounts of fluorine. It is shown that fluorine can have a beneficial effect on oxidation resistance in a certain F-range which is quantified by thermodynamic calculations and by experimental investigations. It is assumed that the F-effect offers a significant potential for improvement of the oxidation resistance of technological TiAl alloys.

Tài liệu tham khảo

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