Verlag des Forschungszentrums Jülich
JUEL-3847
Gil, Aleksander; Niewolak, Leszek; Shemet, Vladimir; Singheiser, Lorenz; Quadakkers, Wilhelm Joseph
Cyclic Oxidation Behaviour of Pack Aluminized Binary and Ternary TiAl-Base Model Alloys
24 S., 2001
The cyclic oxidation resistance of pack aluminized TiAl-based alloys with additions of
Cr, Ni, Nb and Y has been studied. All aluminised materials showed a remarkably lower
corrosion attack than the non-coated material. The effect of aIloying additions on the
microstructure of the coating before and after oxidation was examined. The protective
properties of the pack aluminized coating were adversely affected by cracking of the forrned
TiAl3 -phase. The tendency for crack formation appeared to depend on the respective TiAl
alloying addition and also on its amount.
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