The effect of niobium ion implantation on the oxidation behavior of a {gamma}-TiAl-based intermetallic
- Inst. for Advanced Materials, Ispra (Italy); and others
The effect of niobium implantation (2 x 10{sup 16} and 10{sup 17} ions/cm{sup 2}) on the oxidation behavior of a {gamma}-TiAl-based intermetallic alloy Ti-48 Al-2Cr in air at 800{degrees}C has been examined. Isothermal studies with exposure times up to 200 hr and cyclic-oxidation tests up to 800 hr revealed a negligible effect for the low implantation dose. However, a remarkable decrease in oxidation rates was observed for the material implanted with 10{sup 17} Nb ions/cm{sup 2}. The improvement in the oxidation resistance appeared to be similar to that obtained by alloying of the intermetallic with a few atomic percent niobium. Possible mechanisms for the effect of niobium on the oxidation resistance of TiAl-base intermetallics are discussed in view of the results obtained for the implanted material.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 283032
- Journal Information:
- Oxidation of Metals, Vol. 46, Issue 1-2; Other Information: PBD: Aug 1996
- Country of Publication:
- United States
- Language:
- English
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