Room- and high temperature Wear Resistance of MCrAlY Coatings Deposited by Detonation Gun (D-gun) and Supersonic Plasma Spraying (SSPS) Techniques

In this study, CoNiCrAlY metallic coatings were deposited on an Inconel 718 nickel-based superalloy substrate material using the detonation gun (D-gun) and supersonic plasma spraying (SSPS) techniques. The microstructural and mechanical properties in addition to their room and high temperature wear...

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Bibliographic Details
Published in:Coatings (Basel) 2020-11, Vol.10 (11), p.1107
Main Authors: Kilic, Mehmet, Ozkan, Dervis, Gok, Mustafa Sabri, Karaoglanli, Abdullah Cahit
Format: Article
Language:English
Subjects:
Aviation
Chemical bonds
Corrosion resistance
Detonation
Gas turbine engines
Hardness
High temperature
Mechanical properties
Microstructure
Nickel base alloys
Plasma
Plasma spraying
Porosity
Protective coatings
Room temperature
Substrates
Superalloys
Tribology
Wear resistance
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Summary:In this study, CoNiCrAlY metallic coatings were deposited on an Inconel 718 nickel-based superalloy substrate material using the detonation gun (D-gun) and supersonic plasma spraying (SSPS) techniques. The microstructural and mechanical properties in addition to their room and high temperature wear behavior of the produced coatings were evaluated. The wear tests were performed at room temperature (rt), 250 and 500 °C using 2N and X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) analyses of the worn coatings were performed to assess their wear performance. The coatings produced with D-gun process exhibited higher hardness and lower porosity (550 ± 50 HV0.25 hardness and 1.2 ± 1.0% porosity) than SSPS coatings (with 380 ± 30 HV0.25 hardness and 1.5 ± 1.0% porosity) which resulted in better room- and high temperature wear performance for D-gun coatings. The worn surfaces of both coatings exhibited formation of tribological layers and superficial microstructural changes by varying temperature and load conditions. Increasing load and temperature resulted in increased wear loss whereas increasing temperature resulted in reduced COF values for both coatings.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings10111107