Influence of Low Pressure Plasma Spraying Parameters on MCrAlY Bond Coat and its Microstructure

Góral, Marek; Kotowski, S.; Dychtoń, Kamil; Drajewicz, Marcin; Kubaszek, Tadeusz

doi:10.4028/www.scientific.net/kem.592-593.421

Cited by 12 publications

(14 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NiC • CrAlY bond coat was formed by a low pressure plasma spraying method (LPPS) using Amdry 386 powder (Oerlikon-Metco, Switzerland) containing (wt.%): Co-23%; Cr-17%; Al-12%; Y-0.45%; Ni-bal. The used process parameters were based on our previous research [33]: power current 1600 A, plasma gasses flow Ar: 35 NLPM (normal liters per minute), He: 60 NLPM, powder feed rate: 1 g/min, process chamber pressure: 40 mbar, spray distance 0.95 m.…”

Section: Methodsmentioning

confidence: 99%

“…Both the bond-coat and ceramic topcoat were produced using the LPPS-Hybrid system (Oerlikon-Metco, Switzerland) in the Research and Development Laboratory for Aerospace Materials at Rzeszow University of Technology, Poland. The basic process parameters of the topcoat production were selected based on our previous research [32][33][34][35][36]. The experimental process parameters are presented in Table 1.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

The Influence of Reactive PS-PVD Process Parameters on the Microstructure and Thermal Properties of Yb2Zr2O7 Thermal Barrier Coating

et al. 2022

Self Cite

View full text Add to dashboard Cite

Ytterbium zirconate (Yb2Zr2O7) is one of the most promising materials for yttria-stabilized zirconia (YSZ) replacement as a thermal barrier coating (TBCs) application. In the presented report, the experimental synthesis of Yb2Zr2O7 coating using novel Reactive Plasma Spray Physical Vapor Deposition (Reactive PS-PVD) is described. The obtained coating, irrespective of the power current (1800, 2000 and 2200 A), was characterized by a hybrid structure and a thickness of about 80–110 μm. The results of XRD phase analysis showed the formation of ytterbium zirconate in the coating but the presence of ytterbium and zirconium oxides was also detected. The oxides were not observed in calcinated powder. The decrease in thermal conductivity with power current increase was observed. It was the result of higher thickness and better columnar structure of the coating obtained using higher power current of the plasma torch.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

The Influence of Reactive PS-PVD Process Parameters on the Microstructure and Thermal Properties of Yb2Zr2O7 Thermal Barrier Coating

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…Multilayer TBC is commonly used in industrial conditions, where individual layers play different roles [3]. The inner layer of metallic bond coating (MCrAlY-type) protects the material surface from corrosive factors, while the outer ceramic layer is a thermal insulator [4,5]. In the case of first-stage turbine blades, diffusion aluminide coatings modified by the addition of platinum, hafnium, palladium, or zirconium are used.…”

Section: Introductionmentioning

confidence: 99%

Isothermal Oxidation of Thermal Barrier Coatings Deposited Using LPPS, CVD, and PS-PVD Methods on MAR M247 Nickel Superalloy

Góral

Kubaszek

Pytel

2020

Advances in Manufacturing Science and Technology

Self Cite

View full text Add to dashboard Cite

The article presents the results of microstructural characterization of newly developed three-layer thermal barrier coating (TBC) after isothermal oxidation test. Bond coats were deposited by the overaluminizing of MCrAlY coating deposited by low-pressure plasma spraying (LPPS) process. The outer ceramic layer of yttria-stabilized zirconia was deposited by the plasma spray physical vapor deposition process. The TBCs with MCrAlY bond coat without aluminizing process was produced by LPPS as well. The isothermal oxidation test at 1,100°C for 1,000 h showed that the thickness of the thermally grown oxides alumina oxide layer on overaluminized bond coats was significantly thinner in comparison with conventional LPPS-sprayed MCrAlY bond coats. The possibility of the presence of NiAl and Ni3Al phases in the outer zone of overaluminized bond coat after the oxidation test was observed.

show abstract

“…Thermal barrier coating (TBC) is widely used in industrial environments, whose individual layers play different roles [3]. The MCrAlY type inner metallic bond coat protects the surface of material against corrosive agents, while the outer ceramic layer is a ther-*Corresponding author: e-mail address: m goral@interia.pl mal insulator [4,5]. For first-stage turbine blades, a diffusion aluminide coating-based modified by platinum, hafnium, palladium and zirconium addition is used.…”

Section: Introductionmentioning

confidence: 99%

The TGO formation in overaluminized TBC obtained using plasma spray physical vapour deposition process during cyclic and isothermal oxidation

Góral¹,

Kubaszek²,

Swadźba³

et al. 2020

View full text Add to dashboard Cite

The article presents the results of the microstructural characterization of the newly developed three-layer thermal barrier coating after isothermal oxidation tests. Bond coats were produced by the CVD-overaluminizing of previously low-pressure plasma sprayed (LPPS) MCrAlY coating. The outer ceramic layer was produced by the plasma spray physical vapour deposition method (PS-PVD). For comparison, the MCrAlY bond coat without aluminizing was produced by LPPS. As a result of the overaluminizing process, the formation of the NiAl aluminide layer was observed. Also, the porosity was observed as a result of the Kirkendall effect in the middle zone of the bond coat. Three-layer TBCs microscopic examination showed the formation of a thin and dense TGO layer formed from alumina oxide. The porosity observed on as-deposited three-layer TBCs disappeared during the cyclic oxidation test. A thicker and delaminated TGO layer was formed in a conventional two-layered thermal barrier coating. The isothermal oxidation test at 1100 • C for 1000 h shows that TGO (Thermally Grown Oxides) alumina oxide layer on the overaluminized bond coat was also significantly thinner compared to conventional LPPS-sprayed MCrAlY bond coats. It was concluded that the formation of the TGO layer in three-layer TBC is similar to that observed in diffusion aluminide coatings. The overaluminizing can improve the oxidation resistance of thermal barrier coatings produced by LPPS and PS-PVD methods. K e y w o r d s : thermal barrier coatings (TBC), aluminide coating, plasma spraying, low--pressure plasma spraying (LPPS), plasma spray physical vapour deposition (PS-PVD), oxidation, thermally grown oxides (TGO)

show abstract

Influence of Low Pressure Plasma Spraying Parameters on MCrAlY Bond Coat and its Microstructure

Cited by 12 publications

References 9 publications

The Influence of Reactive PS-PVD Process Parameters on the Microstructure and Thermal Properties of Yb2Zr2O7 Thermal Barrier Coating

The Influence of Reactive PS-PVD Process Parameters on the Microstructure and Thermal Properties of Yb2Zr2O7 Thermal Barrier Coating

Isothermal Oxidation of Thermal Barrier Coatings Deposited Using LPPS, CVD, and PS-PVD Methods on MAR M247 Nickel Superalloy

The TGO formation in overaluminized TBC obtained using plasma spray physical vapour deposition process during cyclic and isothermal oxidation

Contact Info

Product

Resources

About