NDLI: Isothermal oxidation behavior of NiCoCrAlY/ZrO2 composite coating on γ-TiAl alloy

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Isothermal oxidation behavior of NiCoCrAlY/ZrO2 composite coating on γ-TiAl alloy

Content Provider	Scilit
Author	Ding, Zheng Miao, Qiang Liang, Wenping Yang, Zhengang Lin, Hao
Copyright Year	2018
Description	Journal: Materials Research Express In this study, a composite NiCoCrAlY/ZrO2 coating was applied to enhance the property of oxidation resistance on the surface of γ-TiAl alloys ultilizing radio frequency magnetron sputtering. The phase formation, microstrure and chemical composition of the coatings were investigated by X-ray diffraction (XRD) and scanning electron microscopy(SEM). The interlayer binding force was analyzed using scratch test. Further, static oxidation test was carried out at 950 ℃ and the oxidation behavior of the coating was investigated. The results indicated the NiCoCrAlY/ZrO2 coating showed high adhesion strength (critical load>57.5 N) and the oxidation of the coating obeyed a parabolic law. Above all, the oxidation resistance of the substrate was remarkably enhanced after introducing the NiCoCrAlY/ZrO2 coating. The oxidation resistance enhancement could be attributed to the formation of a protective Al2O3 scale. Besides, the ceramic layer ZrO2 that blocked the infiltration of O atoms during high-temperature oxidation.
Related Links	http://iopscience.iop.org/article/10.1088/2053-1591/aac996/pdf
ISSN	20531591
e-ISSN	20531591
DOI	10.1088/2053-1591/aac996
Journal	Materials Research Express
Issue Number	6
Volume Number	5
Language	English
Publisher	IOP Publishing
Publisher Date	2018-06-01
Access Restriction	Open
Subject Keyword	Journal: Materials Research Express Coatings and Films Oxidation Resistance Nicocraly/zro2 Coating
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Metals and Alloys Biomaterials Electronic, Optical and Magnetic Materials Polymers and Plastics

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