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TiAl-based intermetallic alloys are promising candidates as structural materials for high temperature applications. However, industrial application is hindered by the insufficient oxidation resistance at temperature above 700 C in air. In the present study the influence of niobium on the high temperature oxidation behaviour at 800 C of Ti-48Al-2Cr was investigated. Niobium was added by alloying as well as by ion implantation. The morphology and composition of the scales formed during oxidation were studied by glow discharge optical emission spectroscopy (GDOES) and secondary neutral mass spectrometry (SNMS). The latter technique was also used in combination with two-stage oxidation experiments with isotope tracers.

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Authors: SUNDERKÖTTER J D, JRC Ispra (IT);GILLILAND D D, JRC Ispra (IT);HAANAPPEL V A C, JRC Ispra (IT);STROOSNIJDER M F, JRC Ispra (IT);JENETT H, Institut für Spektrochemie und angewandte spektroskopie, Dortmund (DE)
Bibliographic Reference: Article: Fresenius Journal of Analytical Chemistry
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