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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