Comparison of microstructural evolution and oxidation behaviour of NiCoCrAlY and CoNiCrAlY as bond coats used for thermal barrier coatings

Weng, Wei; Wang, Yuemeng; Liao, Yemeng; Li, Cai-Cai; Li, Qiang

doi:10.1016/j.surfcoat.2018.08.024

Cited by 38 publications

(2 citation statements)

References 43 publications

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“…MCrAlY coatings have good oxidation resistance and corrosion resistance; NiCoCrAiY and CoNiCrAlY are most commonly used in thermal barrier coatings, and the main difference between them is the different contents of the two main elements Ni and Co. In addition, studies have shown that NiCoCrAlY has better antioxidant properties compared with CoNiCrAlY [19].…”

Section: Of 20mentioning

confidence: 99%

Determination of Critical Velocity of Cold-Sprayed NiCoCrAlY Coating via Arbitary Lagrangian-Eulerian (ALE) Method of Finite Element Simulation

Wu,

Su,

Zhao

et al. 2023

Coatings

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NiCoCrAlY coatings are commonly used as bond-coat in thermal barrier coatings due to their excellent high-temperature oxidation resistance and suitable thermal expansion coefficient between the superalloy substrate and ceramic top layer. Previous studies have shown that the NiCoCrAlY coatings prepared by cold spray (CS) exhibit excellent comprehensive properties. In the process of cold spray, the solid particles impact onto the substrate with a high velocity, powder particles and the substrate undergo plastic deformation, and the coating is deposited finally. When the velocity of the impacted particles reaches a certain value (critical velocity), the particles can be effectively deposited on the substrate. Due to the short impact time and large plastic deformation of the cold spray process, the process is difficult to be observed in the actual experiment process in real time. Therefore, the current work has used the explicit dynamics method in finite element numerical simulation to simulate the deposition behavior of the particle during the cold spray process. By changing the impact velocities and sizes of particles, the changes in temperature (TEMP), equivalent plastic strain (PEEQ), deformation characteristics of the particle and substrate after particles being completely deposited on the substrate have been obtained. The critical velocity of particle deposition is about 600 m/s, and the larger the particle, the easier it is to deposit. And the current modeling and simulation work provided the theory instruction for the preparation of NiCoCrAlY coatings with excellent performance via cold spray.

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Section: Of 20mentioning

confidence: 99%

Determination of Critical Velocity of Cold-Sprayed NiCoCrAlY Coating via Arbitary Lagrangian-Eulerian (ALE) Method of Finite Element Simulation

Wu,

Su,

Zhao

et al. 2023

Coatings

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“…Therefore, in recent years, new coating preparation methods, new coating materials, and coating structure design have become the hot spots of TBCs research. In the research and development of bond coat materials, high-temperature oxidation resistance, which can determine lifetime of TBCs to a large extent, is considered as a key performance of bond coat [17,18]. Adding some noble metals into MCrAlY to modify its performances is the main current.…”

Section: Introductionmentioning

confidence: 99%

Research Progresses on Ceramic Materials of Thermal Barrier Coatings on Gas Turbine

Zhao

et al. 2021

Coatings

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Thermal barrier coatings (TBCs) play a vitally important role in protecting the hot parts of a gas turbine from high temperature and corrosion effectively. More and more attention has been paid to the performance modification of ZrO2-based ceramics and seeking for new ceramic materials to meet requirements of gas turbine TBCs. The working principle, merits, and demerits of main technologies for coating preparation are elaborated in this paper, and the properties of new ceramic materials are reviewed. It is found that the thermal conductivity, thermal stability, mechanical properties, and other performances of traditional ZrO2-based ceramics could be improved effectively by doping modification. The emphases for new ceramic materials research were put on pyrochlores, magnetoplumbites, rare-earth tantalates, etc. Rare-earth tantalates with great potentials as new top ceramic materials were described in detail. In the end, the development directions of advanced top ceramic coatings, combining doping modification with preparation technology to regulate and control structure property of high-performance ceramic material, were put forward.

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New Materials for Thermal Barrier Coatings: Design, Manufacturing and Performance

Di Girolamo

2023

Engineering Materials

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Comparison of microstructural evolution and oxidation behaviour of NiCoCrAlY and CoNiCrAlY as bond coats used for thermal barrier coatings

Cited by 38 publications

References 43 publications

Determination of Critical Velocity of Cold-Sprayed NiCoCrAlY Coating via Arbitary Lagrangian-Eulerian (ALE) Method of Finite Element Simulation

Determination of Critical Velocity of Cold-Sprayed NiCoCrAlY Coating via Arbitary Lagrangian-Eulerian (ALE) Method of Finite Element Simulation

Research Progresses on Ceramic Materials of Thermal Barrier Coatings on Gas Turbine

New Materials for Thermal Barrier Coatings: Design, Manufacturing and Performance

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