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Study on Oxidation Behavior of NiCrFe Superalloy by EB-PVD

Li Xia

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Abstract

The oxidation behavior at 1000℃ of NiCrFe superalloy by EB-PVD was studied. The results show that the alloy has good oxidation resistance and the oxidation kinetics curves obey the parabolic power law. The alloy after 100 h oxidation at 1000 ℃ is composed of large size ridge-like TiO2 powder and small size pyramidal Cr2 O3 powder at surface, a dense Cr2 O3 layer with about 12 μm in the middle and some small amount of internal oxide(Ni, Fe)Cr2O4.

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What this paper is about

The oxidation behavior at 1000℃ of NiCrFe superalloy by EB-PVD was studied. The results show that the alloy has good oxidation resistance and the oxidation kinetics curves obey the parabolic power law. The alloy after 100 h oxidation at 1000 ℃ is composed of large size ridge-like TiO2 powder and small size pyramidal Cr2 O3 powder at surface, a dense Cr2 O3 layer with about 12 μm in the middle and some small amount of internal oxide(Ni, Fe)Cr2O4.

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Available abstract

The oxidation behavior at 1000℃ of NiCrFe superalloy by EB-PVD was studied. The results show that the alloy has good oxidation resistance and the oxidation kinetics curves obey the parabolic power law. The alloy after 100 h oxidation at 1000 ℃ is composed of large size ridge-like TiO2 powder and small size pyramidal Cr2 O3 powder at surface, a dense Cr2 O3 layer with about 12 μm in the middle and some small amount of internal oxide(Ni, Fe)Cr2O4.

Key concepts: Superalloy, Materials science, Alloy, Internal oxidation, Oxide, Metallurgy, Layer (electronics), Ridge

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