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An investigation on oxidation resistance of DZ22/NiCrAlY coating

Ji Yan

Abstract

NiCrAlY coatings on DZ22 superalloy are prepared by magnetic sputtering deposition to improve the high temperature oxidation resistance of DZ22 superalloy. The results of cyclic oxidation test shown that the cyclic oxidation life of DZ22/NiCrAlY system is about 2000h, which is 10 times as the cyclic oxidation life of DZ22. The high temperature oxidation resistance can be improved by increasing the Y and RE in coating.

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Key concepts: Superalloy, Materials science, Coating, Metallurgy, Sputtering, Deposition (geology), Composite material, Alloy