Diffusion barrier coating system concept for high temperature applications

Narita, Toshio

doi:10.1179/1879139511y.0000000014

Cited by 20 publications

(5 citation statements)

References 75 publications

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“…The destructive effect of the exotic coating on the mechanical properties of the single crystal superalloy showed a clear dependence on the SX superalloy itself: Higher generation of SX results in a greater reduction in rupture life. The fourth-generation single crystal superalloy TMS-138 decreased the creep-rupture life by 86%, in contrast to 63% and 77% for secondgeneration CMSX and third-generation TMS-75, respectively [230]. Figure 44 displays the rupture life impact of inter-diffusion by the PtAl coating on the various generations of superalloys.…”

Section: Diffusion Barrier (Db) For Bond Coatmentioning

confidence: 99%

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

et al. 2022

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Thermal barrier coatings (TBCs) can effectively protect the alloy substrate of hot components in aeroengines or land-based gas turbines by the thermal insulation and corrosion/erosion resistance of the ceramic top coat. However, the continuous pursuit of a higher operating temperature leads to degradation, delamination, and premature failure of the top coat. Both new ceramic materials and new coating structures must be developed to meet the demand for future advanced TBC systems. In this paper, the latest progress of some new ceramic materials is first reviewed. Then, a comprehensive spalling mechanism of the ceramic top coat is summarized to understand the dependence of lifetime on various factors such as oxidation scale growth, ceramic sintering, erosion, and calcium-magnesium-aluminium-silicate (CMAS) molten salt corrosion. Finally, new structural design methods for high-performance TBCs are discussed from the perspectives of lamellar, columnar, and nanostructure inclusions. The latest developments of ceramic top coat will be presented in terms of material selection, structural design, and failure mechanism, and the comprehensive guidance will be provided for the development of next-generation advanced TBCs with higher temperature resistance, better thermal insulation, and longer lifetime.

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Section: Diffusion Barrier (Db) For Bond Coatmentioning

confidence: 99%

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

et al. 2022

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“…High J Cr can inhibit the inward diffusion of Al. Therefore, as a driving force for the evolution of DBL, high J Cr promotes the outward movement of the diffusion layer, which decreases the thickness of the aluminide coating [31]. The movement of the interdiffusion zone on an IN738 superalloy during oxidation in air plus water vapour is shown in Figure 9a.…”

Section: Differences In the Diffusion Barrier Layermentioning

confidence: 99%

Destructive Effect of Water Vapour on an In Situ Diffusion Barrier Layer within an Aluminide Coating on IN738 Alloy

Song

Chen

et al. 2018

Coatings

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High-temperature interdiffusion within a hot-dipped aluminide (Al-10 wt.% Si) coating on an IN738 superalloy was investigated at 1050 • C in air and in air plus water vapour. The resulting morphology of in situ diffusion barrier layer (DBL) within the aluminide coating is affected by oxidizing atmospheres; DBL can effectively retard the interdiffusion of aluminium within the coating. The location of the in situ DBL is governed by the partial pressure of oxygen at different depths from the oxide scales in both atmospheres. Meanwhile, the diffusion fluxes of different elements led to DBLs with different morphologies in the aluminide coating on the Ni-based alloy. growth and temperature of the DBL (intermetallic layer) that was formed in Pd/Cu and Pd/Ag porous stainless steel, the DBL formed by the oxidation of the substrate at 430 • C, and the DBL was effective in reducing the intermetallic diffusion at 500 • C. Müller et al. [24] discussed the effects of reactive element oxides and the property of diffusion on a self-forming DBL on nickel-based superalloys, and the DBL was destroyed due to the reaction of Y and Hf from MCrAlY (M = Ni, Co). The above studies indicated that the relationships between the growth, temperatures and reactive element oxides of the DBL, as well as its oxidation resistance, are complex and not yet fully understood at high temperature. Therefore, many factors affect the growth and morphology of the DBL. The relationship between the growth of the DBL and diffusion of elements in different atmospheres requires further study.The purpose of this research was to understand the influence between the in situ DBL and the diffusion of elements during exposure to air and air plus water vapour environment. Moreover, the relationship between the external environment and the growth of DBL has been examined. Coatings 2018, 8, x FOR PEER REVIEW 10 of 11 Author Contributions: Conceptualization, C.L. and P.S.; Methodology, J.L.; Software, X.H.; Validation, K.C., X.Y. and P.S.; Formal Analysis, X.H., K.C. and X.Y.; Investigation, C.L.; Resources, P.S.; Data Curation, J.L.; Writing-Original Draft Preparation, C.L.; Writing-Review & Editing, C.L. and P.S.; Visualization, K.C.; Supervision, P.S. and J.L.; Project Administration, P.S.

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“…The other way to inhibit the coating/superalloy interdiffusion is to introduce a barrier layer between the coatings and superalloys [10,11]. During the past years, many efforts have been devoted to researches on diffusion barriers, including ceramic and metallic ones.…”

Section: Introductionmentioning

confidence: 99%

Interdiffusion and oxidation behaviour of Pt/Ru modified Ni–30Al–0.3Dy coating on Ni₃Al-based superalloy

Liu

Pan³

et al. 2022

Surface Engineering

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A high purity of Ru or Pt was deliberately deposited as a middle layer between an aluminaforming Ni-30Al-0.3Dy coating and a Ni 3 Al-based single-crystal superalloy. It was found that the Ru modified Ni-30Al-0.3Dy coating effectively suppressed the interdiffusion between the coating and the substrate and inhibited the precipitation of topologically close-packed (TCP) phases which impaired the mechanical properties of the superalloy. The 1100°C annealing and oxidation tests suggested that, different from Pt, Ru restricted the inward diffusion of Al from the coating to the substrate, thereby hindering the interdiffusion. And the existence of Ru layer can simultaneously improve the oxidation resistance of the coating.

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Diffusion barrier coating system concept for high temperature applications

Cited by 20 publications

References 75 publications

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

Destructive Effect of Water Vapour on an In Situ Diffusion Barrier Layer within an Aluminide Coating on IN738 Alloy

Interdiffusion and oxidation behaviour of Pt/Ru modified Ni–30Al–0.3Dy coating on Ni₃Al-based superalloy

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Diffusion barrier coating system concept for high temperature applications

Cited by 20 publications

References 75 publications

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

Destructive Effect of Water Vapour on an In Situ Diffusion Barrier Layer within an Aluminide Coating on IN738 Alloy

Interdiffusion and oxidation behaviour of Pt/Ru modified Ni–30Al–0.3Dy coating on Ni3Al-based superalloy

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Interdiffusion and oxidation behaviour of Pt/Ru modified Ni–30Al–0.3Dy coating on Ni₃Al-based superalloy