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Improvement of Oxidation Resistance of γ-TiAl at 900 and 1000 °C Through Hot-dip Aluminizing

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Abstract

Hot-dip aluminizing method and subsequent interdiffusion treatment were used to develop a TiAl3 coating on Ti–45Al–2Cr–2Nb–0.15B (at.%) alloy. A two-phase coating consisting of an outer pure Al layer and an inner TiAl3 layer formed on the alloy after the hot-dip and then a single phase TiAl3 coating was obtained by using interdiffusion treatment. Oxidation of the TiAl3 coating was conducted at 900 and 1000 °C. Both the interrupt oxidation and the isothermal oxidation tests indicated that the coating provided high protectiveness for the alloy. The coating was stable for at least 300 h during the interrupt oxidation at 900 and 1000 °C, and it was stable for at least 500 h at 1000 °C and 1000 h at 900 °C during the isothermal oxidation. The oxidation behavior of the coating was discussed in detail.

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Authors and Affiliations

  1. School of Applied Chemistry, Shenyang Institute of Chemical Technology, 110142, Shenyang, China

    Z. G. Zhang, X. Teng, Y. L. Mao, C. X. Cao & S. J. Wang

  2. Center of Physical Chemistry Test, Shenyang Institute of Chemical Technology, 110142, Shenyang, China

    L. Wang

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  1. Z. G. Zhang
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  2. X. Teng
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  3. Y. L. Mao
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  4. C. X. Cao
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  5. S. J. Wang
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  6. L. Wang
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Correspondence to Z. G. Zhang.

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Zhang, Z.G., Teng, X., Mao, Y.L. et al. Improvement of Oxidation Resistance of γ-TiAl at 900 and 1000 °C Through Hot-dip Aluminizing. Oxid Met 73, 455–466 (2010). https://doi.org/10.1007/s11085-009-9187-5

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  • DOI: https://doi.org/10.1007/s11085-009-9187-5

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