The Improvement of Oxidation Resistance of a Re-Based Diffusion Barrier/Ni–Al Coating on the Single-Crystal Ni-Based TMS-82+ Superalloy

Wu, Yeping; Wang, Y.M.; Song, Gui-Ming; Li, X.W.

doi:10.1007/s11085-011-9264-4

Cited by 12 publications

(5 citation statements)

References 32 publications

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“…A limited amount of element interdiffusion behavior can be observed. The interdiffusion zone is attributed to the internal diffusion of the elements Cr and Al from the bonding layer into the substrate, and the external diffusion of Ni, W, and the strengthening elements Mo, Ta, and Re from the substrate into the bonding layer [17,18]. The phase structure patterns of the as-prepared thermal barrier coating are presented in Figure 3.…”

Section: Microstructure and Phase Composition Of The As-prepared Coatingmentioning

confidence: 99%

Failure Mechanism of Thermal Barrier Coatings on Nozzle Guide Vanes Fabricated from Nickel-Based Single-Crystal Superalloy under Gas Thermal Shock Conditions

Wang,

Fu,

Yang

et al. 2023

Coatings

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The objective of this study was to investigate the early failure behavior of thermal barrier coatings on single-crystal nozzle guide vanes under gas thermal shock conditions. The microstructure and mechanical properties of the thermal barrier coating before and after the gas thermal shock tests were analyzed using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and microhardness testing. The results indicate the presence of a mixed layer containing Ni, Cr, Al, Zr, and O at the base of the ceramic layer, and reveal failure behavior in the thermal barrier coating. The analysis suggests that the incomplete formation of the thermal growth oxide layer between the ceramic layer and the bonding layer, before the deposition of the YSZ ceramic layer, led to the easy diffusion of elements from the bonding layer into the root of the ceramic layer during the gas thermal shock process, resulting in the formation of a mixed layer. In the test environment, significant thermal stress was generated in the mixed layer, leading to transverse cracks and ultimately causing early failure of the thermal barrier coating. Consequently, the “incomplete initial TGO layer” model is proposed.

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Section: Microstructure and Phase Composition Of The As-prepared Coatingmentioning

confidence: 99%

Failure Mechanism of Thermal Barrier Coatings on Nozzle Guide Vanes Fabricated from Nickel-Based Single-Crystal Superalloy under Gas Thermal Shock Conditions

Wang,

Fu,

Yang

et al. 2023

Coatings

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“…However, oxide films have been reported to deteriorate the cohesion between the coating and substrate due to the difference in thermal expansion coefficient between the coating and substrate materials, which induces high residual stresses at the interface. 6 Many intermetallic diffusion barriers are M-Ni(-Cr) alloys; M represents the elements Re, 9 W, 7 or Hf. 10 These elements can promote the formation of a layer that contains the s phase (Re-Cr-Ni, NiW, Ni 3 Hf); this layer is reported to be an effective barrier for Al diffusion.…”

Section: Introductionmentioning

confidence: 99%

“…Many intermetallic diffusion barriers are M–Ni(–Cr) alloys; M represents the elements Re, 9 W, 7 or Hf. 10 These elements can promote the formation of a layer that contains the σ phase (Re–Cr–Ni, NiW, Ni 3 Hf); this layer is reported to be an effective barrier for Al diffusion.…”

Section: Introductionmentioning

confidence: 99%

Oxidation resistance of novel multilayer coatings for gas turbine components

Gao

Yang

Liu

et al. 2014

Surface Engineering

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This article presents a study of the oxidation behaviour of two multilayer coatings, denoted as MC I and MC II, respectively, which are designed with a three-layer architecture: a Cr-Si barrier layer on the IN738 substrate, a NiCrAlY intermediate layer, and an aluminised top layer. The emphasis of this research is on the total amount of oxide scales formed and the residual oxide scales on the coatings with various combinations among the three layers to investigate the effects of each layer and the interactions between the layers on the oxidation resistance of the coatings. The difference between the two multilayer coatings is that the Al content in the top layer of MC II is twice as much as that in the top layer of MC I. The coatings are fabricated through a combination of plasma spray and pack cementation processes, and then experience oxidation test at 1050uC for 1000 h. The average thicknesses of the oxide scales are around 15 and 45 mm for MC I and MC II, respectively. The experimental results are modelled using the analysis of variance. Two models for the volume of total oxide scales and the ratio of the volume of spalled oxide scales to the volume of total oxide scales, are proposed to study the effects of the coating layers on the formation and spallation of oxide scales, which directly affect the oxidation resistance of the coatings. The experimental and analytical results demonstrate that the Cr-Si layer and its interactions with the other coating layers affect the spallation of oxide scales the most among the three layers. It prevents Al and Cr from diffusing into the substrate. The interaction between the Cr-Si layer and the NiCrAlY layer, and the increase in Al/Ni ratio of the aluminide top layer, promote the formation of oxide scales and also minimise the spallation of oxide scales.

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“…Nibased superalloys added with 2-6wt.% Re showed superior creep and fatigue properties as well as oxidation resistance at high temperature. [20][21][22] Re has been later used in high temperature coatings since it is suggested that Re additions can lead to significant improvement in long-term performance of coatings with respect to multi-aspects of thermomechanical property, 23 oxidation 24 and interdiffusion resistance. 25 In our previous work, 26 a Ni-Re interlayer was prepared as a diffusion barrier between the Ni-Al coating and the austenitic steel.…”

mentioning

confidence: 99%

Effect of Ni–Al Coating with and without Re Modification on Coking and Metal Dusting of Fe–Cr–Ni Alloy under Cyclic Condition at 600 °C

Xie

Grzesik

et al. 2020

J. Electrochem. Soc.

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Ni–Al coatings with and without Rhenium (Re) modification were prepared using electroplating and packing cementation methods on the matrix of Fe–Cr–Ni alloy. Corrosion behaviours of the matrix alloy and two coated samples were investigated in 30CO–64H2–6H2O gas mixture under thermal cycling condition at 600 °C. All coated samples showed significantly improved corrosion performance. Re addition was ineffective in controlling the surface coking and metal dusting of Ni–Al coating but enhanced the thermal fatigue resistance to thermal cycling. The corrosion mechanism of Ni–Al coating exposed to metal dusting environment under thermal cycling condition and the effect of Re were discussed.

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The Improvement of Oxidation Resistance of a Re-Based Diffusion Barrier/Ni–Al Coating on the Single-Crystal Ni-Based TMS-82+ Superalloy

Cited by 12 publications

References 32 publications

Failure Mechanism of Thermal Barrier Coatings on Nozzle Guide Vanes Fabricated from Nickel-Based Single-Crystal Superalloy under Gas Thermal Shock Conditions

Failure Mechanism of Thermal Barrier Coatings on Nozzle Guide Vanes Fabricated from Nickel-Based Single-Crystal Superalloy under Gas Thermal Shock Conditions

Oxidation resistance of novel multilayer coatings for gas turbine components

Effect of Ni–Al Coating with and without Re Modification on Coking and Metal Dusting of Fe–Cr–Ni Alloy under Cyclic Condition at 600 °C

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