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The effect of various elements added by ion implantation on the isothermal (up to 150 h) and cyclic (up to 1500 h) oxidation behaviour of y-titanium aluminide-based intermetallics at 800 C in air is discussed. Ion implantation of silicon, niobium tantalum, tungsten and aluminium showed a large beneficial effect on the isothermal oxidation behaviour of Ti-48Al-2Cr. For longer exposure times under cyclic oxidation conditions the corrosion scale formed on the aluminium-implanted specimens and silicon-implanted specimens were especially prone to spallation. Oxidation of the specimens implanted with silicon or niobium revealed similar results as found for the intermetallics alloyed with these elements. Furthermore, it is concluded that care should be taken when studying the cyclic corrosion damage of implanted specimens by gravimetric methods only.

Additional information

Authors: HAANAPPEL V A C, JRC Ispra (IT);STROOSNIJDER M F, JRC Ispra (IT);SCHMUTZLER H J, ABB Corporate Research, Heidelberg (DE)
Bibliographic Reference: Paper presented: The Eleventh International Conference on Surface Modification Technology SMT 11, Paris (FR), September 8-10, 1997
Availability: Available from (1) as Paper EN 40912 ORA
Record Number: 199711379 / Last updated on: 1997-10-23
Original language: en
Available languages: en
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