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Effect of chromium on the oxidation resistance of TiAl intermetallics

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Abstract

The effect of 10 at.%Cr on the oxidation resistance of TiAl intermetallic compound at 800–1100°C in air was investigated. The results indicated that 10 at.%Cr equally substituting for Ti and Al in TiAl alloy had duplex effects on the isothermal kinetics of DAL At lower temperatures (800–900°C), Cr increased the oxidation rates as a result of the doping effect of Cr in the scale and at higher temperatures (1000–1100°C), especially at 1100°C, Cr significantly reduced the oxidation rates as a result of the formation of a continuous Al2O3 film on the surface. 10 at.%Cr only substituting for Ti in TiAl alloy remarkably reduced the oxidation rates at all temperatures by about two orders of magnitude. Moreover, 10 at%Cr significantly improved the cyclic-oxidation rsistance of TiAl alloy.

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Authors and Affiliations

  1. State Key Laboratory for Corrosion and Protection, Institute of Corrosion and Protection of Metals, Academia Sinica, 110015, Shenyang, China

    Fuhui Wang, Zhaolin Tang & Weitao Wu

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  1. Fuhui Wang
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  2. Zhaolin Tang
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  3. Weitao Wu
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Wang, F., Tang, Z. & Wu, W. Effect of chromium on the oxidation resistance of TiAl intermetallics. Oxid Met 48, 381–390 (1997). https://doi.org/10.1007/BF02153457

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  • DOI: https://doi.org/10.1007/BF02153457

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