Effect of spraying powder characteristics on mechanical and thermal shock properties of plasma-sprayed YSZ thermal barrier coating

Shi, Mengchuan; Zhang, Xue; Zhang, Zhenya; Ji, Xiaojuan; Byon, Eungsun; Zhang, Shihong

doi:10.1016/j.surfcoat.2020.125913

Cited by 53 publications

(12 citation statements)

References 29 publications

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“…Since in many cases the surface of working elements or machines is exposed to the harmful environment, the use of protective coatings allows improving the reliability and maintain manufacturing cost at reasonable level. There are many methods of production of protective coatings, such as spraying processes, which include plasma spaying [2,3], high-velocity oxygen-fuel (HVOF) spraying [4,5] and also physical vapor deposition (PVD) method [6][7][8][9]. The last method allows producing coatings with a wide range of properties.…”

Section: Introductionmentioning

confidence: 99%

Resistance of PVD Coatings to Erosive and Wear Processes: A Review

Krella

2020

Coatings

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Due to the increasing maintenance costs of hydraulic machines related to the damages caused by cavitation erosion and/or erosion of solid particles, as well as in tribological connections, surface protection of these components is very important. Up to now, numerous investigations of resistance of coatings, mainly nitride coatings, such as CrN, TiN, TiCN, (Ti,Cr)N coatings and multilayer TiN/Ti, ZrN/CrN and TN/(Ti,Al)N coatings, produced by physical vapor deposition (PVD) method using different techniques of deposition, such as magnetron sputtering, arc evaporation or ion plating, to cavitation erosion, solid particle erosion and wear have been made. The results of these investigations, degradation processes and main test devices used are presented in this paper. An effect of deposition of mono- and multi-layer PVD coatings on duration of incubation period, cumulative weight loss and erosion rate, as well as on wear rate and coefficient of friction in tribological tests is discussed. It is shown that PVD coating does not always provide extended incubation time and/or improved resistance to mentioned types of damage. The influence of structure, hardness, residence to plastic deformation and stresses in the coatings on erosion and wear resistance is discussed. In the case of cavitation erosion and solid particle erosion, a limit value of the ratio of hardness (H) to Young’s modulus (E) exists at which the best resistance is gained. In the case of tribological tests, the higher the H/E ratio and the lower the coefficient of friction, the lower the wear rate, but there are also many exceptions.

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Section: Introductionmentioning

confidence: 99%

Resistance of PVD Coatings to Erosive and Wear Processes: A Review

Krella

2020

Coatings

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“…The Yb 2 Si 2 O 7 powder prepared by sol–gel method must be granulated to meet the requirements of particle size and fluidity of plasma spraying. According to the literature, 22,23 Yb 2 Si 2 O 7 agglomerated spray powder was prepared by spray drying and granulation technology in this experiment. Figure 1 shows the morphology, x‐ray diffractometer (XRD) patterns and particle size distribution, fluidity, bulk density of Yb 2 Si 2 O 7 spraying powder.…”

Section: Methodsmentioning

confidence: 99%

Optimization of spraying process and stoichiometric stage of plasma‐sprayed Yb₂Si₂O₇ environmental barrier coating

Xue,

Wang,

Wang

et al. 2024

J Am Ceram Soc.

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Ytterbium disilicate (Yb2Si2O7) is a potential environmental barrier coating (EBC) material. In this paper, the microstructure and phase composition of plasma‐sprayed Yb2Si2O7 coatings with different spraying process were systematically investigated to optimize the spraying power and spraying distance. Furthermore, in order to obtain Yb2Si2O7 coating with single phase, a certain proportion of SiO2 was added to the Yb2Si2O7 powder to compensate for the volatilization of SiO2 during plasma‐spraying process, and the influence of spraying powder composition on the microstructure and phase structure (composition and content) of Yb2Si2O7 coatings were also characterized in detail. The results showed that the Yb2Si2O7 coating was dense with fewer pores and cracks at the spraying power of 40 kW and the spraying distance of 100 mm. Yb2Si2O7 coating with the “sandwich” structure was composed of Yb2Si2O7, Yb2Si2O7 + Yb2SiO5, and Yb2SiO5 three microstructures, which was mainly caused by the volatilization of SiO2 in Yb2Si2O7 spraying powder. The Yb2Si2O7 coating contained 90.68 mol.% Yb2Si2O7 phase and 9.32 mol.% Yb2SiO5 phase after crystallization at 1300°C for 20 h. The coating was composed of Yb2Si2O7 phase and amorphous phase after SiO2 addition. Yb2SiO5 phase precipitated from the coating after heat treatment at 1300°C, and its content decreased with the increase of SiO2 content. The content of the Yb2Si2O7 phase was as high as 99.41 mol.% when SiO2 content was 10 mol.%, which would provide a scientific basis for further research on stoichiometric Yb2Si2O7 EBCs with excellent properties.

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“…Nanoparticles can not be directly thermal sprayed due to their limited flowability and low mass. Therefore, the nano YSZ particles need to be agglomerated into granules with diameters ranging from 30 to 70 μm for thermal spray, which is typically accomplished through spray drying [33,41]. Recently, the electro-spraying technique (ESP) has been proposed by Guo et al [42], Xing et al [43] and Zou et al [44] to be applied in the preparation of feedstock using nano YSZ powder (~200 nm).…”

Section: Counteracting the Sintering Effects By The Nanostructurementioning

confidence: 99%

Progress update on extending the durability of air plasma sprayed thermal barrier coatings

Luo

Chen

Zhou

et al. 2022

Ceramics International

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Effect of spraying powder characteristics on mechanical and thermal shock properties of plasma-sprayed YSZ thermal barrier coating

Cited by 53 publications

References 29 publications

Resistance of PVD Coatings to Erosive and Wear Processes: A Review

Resistance of PVD Coatings to Erosive and Wear Processes: A Review

Optimization of spraying process and stoichiometric stage of plasma‐sprayed Yb₂Si₂O₇ environmental barrier coating

Progress update on extending the durability of air plasma sprayed thermal barrier coatings

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Effect of spraying powder characteristics on mechanical and thermal shock properties of plasma-sprayed YSZ thermal barrier coating

Cited by 53 publications

References 29 publications

Resistance of PVD Coatings to Erosive and Wear Processes: A Review

Resistance of PVD Coatings to Erosive and Wear Processes: A Review

Optimization of spraying process and stoichiometric stage of plasma‐sprayed Yb2Si2O7 environmental barrier coating

Progress update on extending the durability of air plasma sprayed thermal barrier coatings

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Product

Resources

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Optimization of spraying process and stoichiometric stage of plasma‐sprayed Yb₂Si₂O₇ environmental barrier coating