A comparative study of DS NiCrAlY coating and LPPS NiCrAlY coating

A comparative study of DS NiCrAlY coating and LPPS NiCrAlY coating

Two thermal spraying techniques, namely, detonation gun spraying (DS) and low pressure plasma spraying (LPPS), were used to prepare different NiCrAlY coatings on a single crystal (SC) Ni-based superalloy. Microstructure, surface hardness, adhesion strength and high-temperature oxidation behavior of...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2003-11, Vol.360 (1-2), p.65-69
Hauptverfasser: Zhang, Y.J., Sun, X.F., Zhang, Y.C., Jin, T., Deng, C.G., Guan, H.R., Hu, Z.Q.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Detonation gun spraying
Exact sciences and technology
Low-pressure plasma spraying
Metallic coatings
Metals. Metallurgy
Microstructure
Oxidation resistance
Production techniques
Surface treatment
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Beschreibung
Zusammenfassung:Two thermal spraying techniques, namely, detonation gun spraying (DS) and low pressure plasma spraying (LPPS), were used to prepare different NiCrAlY coatings on a single crystal (SC) Ni-based superalloy. Microstructure, surface hardness, adhesion strength and high-temperature oxidation behavior of DS NiCrAlY coating and LPPS NiCrAlY coating were compared. The results showed that the two coatings in as-sprayed state had the same splat layer structure. Somewhat differently, oxidation reaction took place in DS process and Al2O3 sandwiched between the splats in DS NiCrAlY coating. It is found that the surface hardness of DS coatings are higher than those of LPPS coating. But the oxidation resistance of DS coating is relatively lower.
ISSN:0921-5093
1873-4936
DOI:10.1016/S0921-5093(03)00225-9