2013•Advanced materials researchRequires access

Comparative Study of the Cyclic Oxidation Resistance of NiCrAlY and NiCoCrAlY Coatings

Jian Ming Liu, Yue Guang Yu, Xian Jing Ren, De Ming Zhang, Jie Shen

Abstract

The free standing NiCrAlY and NiCoCrAlY coating samples were prepared by HVOF. The cyclic oxidation resistance of the coatings was evaluated and the coating surface morphology was investigated by SEM. The MCrAlY coating CTE was tested. The results show that the NiCoCrAlY coating exhibits better oxidation resistance than the NiCrAlY coating and the difference in MCrAlY CTE curve shape is considered as the main reason.

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Key concepts: Materials science, Coating, Thermal spraying, Metallurgy, Composite material