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Oxidation Behavior of a Single-Crystal Ni-base Superalloy in Air at 900, 1000 and 1100°C

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The isothermal-oxidation behavior of a single-crystal (SC) Ni-base superalloy was studied over the temperature range from 900 to 1100°C and analyzed by OM, TGA, XRD, EDX, SEM and EPMA. The alloy obeyed a subparabolic rate law during oxidation at 900 and 1000°C, whereas the alloy showed parabolic behavior at 1100°C exposure. The variations in the chemical composition due to segregation, which resulted from the solidification process, led to the formation of different kinds of oxide scale on the dendritic and interdendritic areas during oxidation at 900 and 1000°C, while the alloy exhibited relatively uniform oxidation at 1100°C. The growth mechanism of the scale is discussed.

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Authors and Affiliations

  1. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, PR China

    L. Huang, X. F. Sun, H. R. Guan & Z. Q. Hu

  2. Superalloy Department, Institute of Metal Research, CAS, 72 Wenhua Rd, Shenyang, 110016, China

    L. Huang

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  1. L. Huang
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  2. X. F. Sun
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  3. H. R. Guan
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  4. Z. Q. Hu
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Correspondence to L. Huang.

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Huang, L., Sun, X., Guan, H. et al. Oxidation Behavior of a Single-Crystal Ni-base Superalloy in Air at 900, 1000 and 1100°C. Oxid Met 65, 207–222 (2006). https://doi.org/10.1007/s11085-006-9016-z

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  • DOI: https://doi.org/10.1007/s11085-006-9016-z

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