Cyclic oxidation and rumpling behaviour of single phase β-(Ni,Pt)Al coatings with different thickness of initial Pt plating

Yang, Yuyi; Jiang, Chengyang; Yao, Haoyu; Zhang, Bao; Zhu, Shenglong; Wang, F.H.

doi:10.1016/j.corsci.2016.05.011

Cited by 65 publications

(16 citation statements)

References 56 publications

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“…Since a high-temperature condition reduces the coating yield strength to a value lower than the thermal mismatch stress, then the plastic deformation of the coating can be induced. Meanwhile, other factors like temperature variation, length of holding time, and the number or frequency of thermal cycles investigated in previous studies [10,11] affect the rumpling behavior by substantially influencing the thermal mismatch stress. When the coating and substrate possessed the same expansion coefficients as the NANA sample, the rumpling vanished and these external factors had no impact.…”

Section: Discussionmentioning

confidence: 97%

“…Accordingly, the magnitude of the stresses acting on the coating tends to play a decisive role in the coating deformation, namely rumpling behavior. To date, some progress has been made on factors such as thermal cyclic frequency and numbers, oxidation dwell time and temperature, coating thickness, and initial surface roughness [7][8][9][10][11]. Previous studies show that these factors indeed affect the rumpling behavior by varying degrees.…”

Section: Introductionmentioning

confidence: 99%

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Internal Factors Affecting the Surface Rumpling of a β-NiAlHf Coating

Liu

Dong

et al. 2021

Coatings

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β-NiAl coatings on a superalloy substrate will inevitably result in severe rumpling at elevated temperatures; however, the associated rumpling mechanisms are not completely understood. The scale rumpling behavior of a β-NiAlHf coating deposited by electron beam physical vapor deposition (EB-PVD) on single crystal superalloy IC21 was investigated in this work. Some internal factors, including the mismatch in the coefficient of thermal expansion and the stress induced by the growth of oxide scale and the phase transformation, were taken into consideration. The thermal mismatch stress between the coating and substrate was the main internal factor responsible for rumpling behavior during thermal cyclic loads, while the phase degradation from β-NiAl to γ’-Ni3Al in the coating played a dominant role during static thermal loads.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Internal Factors Affecting the Surface Rumpling of a β-NiAlHf Coating

Liu

Dong

et al. 2021

Coatings

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“…Coatings consisting primarily of the β-NiAl phase are typically referred to as nickel aluminide coatings and possess an ordered body centered cubic (BCC) structure. During high temperature exposure, they also serve as a source of Al for the development and maintenance of the protective alumina (Al 2 O 3 ) scale on the surface [ 17 , 33 , 34 , 35 ].…”

Section: The Role Of Electrodeposition In Thermal Barrier Coatingsmentioning

confidence: 99%

Progress in Novel Electrodeposited Bond Coats for Thermal Barrier Coating Systems

Maniam

Paul

2021

Materials

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The increased demand for high performance gas turbine engines has resulted in a continuous search for new base materials and coatings. With the significant developments in nickel-based superalloys, the quest for developments related to thermal barrier coating (TBC) systems is increasing rapidly and is considered a key area of research. Of key importance are the processing routes that can provide the required coating properties when applied on engine components with complex shapes, such as turbine vanes, blades, etc. Despite significant research and development in the coating systems, the scope of electrodeposition as a potential alternative to the conventional methods of producing bond coats has only been realised to a limited extent. Additionally, their effectiveness in prolonging the alloys’ lifetime is not well understood. This review summarises the work on electrodeposition as a coating development method for application in high temperature alloys for gas turbine engines and discusses the progress in the coatings that combine electrodeposition and other processes to achieve desired bond coats. The overall aim of this review is to emphasise the role of electrodeposition as a potential cost-effective alternative to produce bond coats. Besides, the developments in the electrodeposition of aluminium from ionic liquids for potential applications in gas turbines and the nuclear sector, as well as cost considerations and future challenges, are reviewed with the crucial raw materials’ current and future savings scenarios in mind.

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“…Due to the rising engine-inlet temperature, the protective coatings have to be able to serve in a more aggressive environment because the aluminide coating is easy to generate void, crack, and spallation during long-term servicing. The high temperature oxidation and corrosion resistance of aluminide coating can be enhanced by adding many elements (Montero et al, 2013;Zhao and Zhou, 2014;Yang et al, 2016;Huang et al, 2020). The common methods for preparing aluminide coating are thermal spray, pack cementation, chemical vapor deposition, and hot-dipping (Hu et al, 2006;Zhang et al, 2012;Cheng et al, 2013;Shirvani et al, 2013;Xu et al, 2015;Sitek et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Influence of Pre-Oxidation on High Temperature Oxidation and Corrosion Behavior of Ni-Based Aluminide Coating in Na2SO4 Salt at 1050°C

Zhang

Song

et al. 2021

Front. Mater.

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Aluminide coating is prepared on K438 Ni-based superalloy by pack cementation. The hot corrosion test of as-received and pre-oxidation aluminide coating in Na2SO4 salt are carried out at 1050°C. The coating morphologies, phase composition, and corrosion products are characterized by XRD, SEM, EDS, and TEM. The conclusion is that the pre-oxidation aluminide coating has excellent hot corrosion properties. After hot corrosion, the oxide scale of pre-oxidation aluminide coating is the thinnest and maintains good integrity. However, the oxide scale of as-received aluminide coating fluctuates greatly and there are corrosion cavities. CrS is formed in the alloy immediately below the oxide scale for the two coating systems.

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Cyclic oxidation and rumpling behaviour of single phase β-(Ni,Pt)Al coatings with different thickness of initial Pt plating

Cited by 65 publications

References 56 publications

Internal Factors Affecting the Surface Rumpling of a β-NiAlHf Coating

Internal Factors Affecting the Surface Rumpling of a β-NiAlHf Coating

Progress in Novel Electrodeposited Bond Coats for Thermal Barrier Coating Systems

Influence of Pre-Oxidation on High Temperature Oxidation and Corrosion Behavior of Ni-Based Aluminide Coating in Na2SO4 Salt at 1050°C

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