2010•Rejiagong gongyiRequires access

Oxidation Resistance of NiCrAlYSi Coating on Superalloy K4104 Surface

Bian Dongmei

Abstract

NiCrAlYSi coating was prepared on superalloy K4104 by arc ion plating.The oxidation testing of samples with and without NiCrAlYSi coating was carried out at 1100℃ for300 h.The results show that the superalloy K4104 without coating is composed of α-Al2O3,and little Cr2O3 and the internal oxidation appears in the matrix.The superalloy K4104 with NiCrAlYSi coating is composed of α-Al2O3,Cr2O3 and little TiO2,NiO and NiCr2O4.It appears to be some spallation,voids and internal oxidation in the processing of oxidation,but the oxidation resistance does not decrease obviously.The NiCrAlYSi coating enhances the oxidation resistance of the superalloy K4104.

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Key concepts: Superalloy, Materials science, Coating, Internal oxidation, Spallation, Metallurgy, Ion plating, Alloy