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OXIDATION BEHAVIOR OF TWO PROTECTIVE COATINGS ON ALLOY IC-6

Wen Lishi

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Abstract

The oxidation kinetic curves of the alloy IC-6 and its protective coatings at 900～1100℃ were measured.The results indicate that the oxidation resistance of intermetallic compound alloy IC-6 is remarkable improved by NiCrAlY and NiCoCrAlY coatings respectively.However,NiCrAlY coating has better oxidation resistance than NiCoCrAlY coating exposed at 1000 and 1100℃.For NiCrAlY coating,the oxide scales formed at 900℃ and 1000℃ mainly consist of α-Al 2O 3 and a small amount of Cr 2O 3.For NiCoCrAlY coating,though the oxide scales consist only of α-Al 2O 3 at 900℃,the oxidation resistance was inferior due to the incomplete scales.The scales formed on the NiCoCrAlY coating at 1000℃ consist of α-Al 2O 3 and Cr 2O 3.

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What this paper is about

The oxidation kinetic curves of the alloy IC-6 and its protective coatings at 900～1100℃ were measured.The results indicate that the oxidation resistance of intermetallic compound alloy IC-6 is remarkable improved by NiCrAlY and NiCoCrAlY coatings respectively.However,NiCrAlY coating has better oxidation resistance than NiCoCrAlY coating exposed at 1000 and 1100℃.For NiCrAlY coating,the oxide scales formed at 900℃ and 1000℃ mainly consist of α-Al 2O 3 and a small amount of Cr 2O 3.For NiCoCrAlY coating,though the oxide scales consist only of α-Al 2O 3 at 900℃,the oxidation resistance was inferior due to the incomplete scales.The scales formed on the NiCoCrAlY coating at 1000℃ consist of α-Al 2O 3 and Cr 2O 3.

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Available abstract

The oxidation kinetic curves of the alloy IC-6 and its protective coatings at 900～1100℃ were measured.The results indicate that the oxidation resistance of intermetallic compound alloy IC-6 is remarkable improved by NiCrAlY and NiCoCrAlY coatings respectively.However,NiCrAlY coating has better oxidation resistance than NiCoCrAlY coating exposed at 1000 and 1100℃.For NiCrAlY coating,the oxide scales formed at 900℃ and 1000℃ mainly consist of α-Al 2O 3 and a small amount of Cr 2O 3.For NiCoCrAlY coating,though the oxide scales consist only of α-Al 2O 3 at 900℃,the oxidation resistance was inferior due to the incomplete scales.The scales formed on the NiCoCrAlY coating at 1000℃ consist of α-Al 2O 3 and Cr 2O 3.

Key concepts: Materials science, Alloy, Intermetallic, Coating, Oxide, Metallurgy, Composite material

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OXIDATION BEHAVIOR OF TWO PROTECTIVE COATINGS ON ALLOY IC-6 — Research Paper | ScholarLens