Formation of vertical cracks in solution-precursor plasma-sprayed thermal barrier coatings

Xie, Liangde; Chen, Dianying; Jordan, Eric H.; Ozturk, Alper; Wu, Fang; Ma, Xinqing; Cetegen, Baki M.; Gell, Maurice

doi:10.1016/j.surfcoat.2006.01.020

Cited by 90 publications

(42 citation statements)

References 10 publications

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“…The results indicated that anatase to rutile phase transformation occurred during coating deposition. As mentioned above, the high temperature plasma jet will repeatedly scan over the coating surface during the plasma spray process; the coating surface temperature during deposition can reach over 700°C [5,11], which is higher than anatase to rutile phase transformation temperature. Therefore, both coatings are composed exclusively of rutile phases.…”

Section: Discussionmentioning

confidence: 99%

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The Solution Precursor Plasma Spray Coatings: Influence of Solvent Type

Chen

Jordan

Gell

2009

Plasma Chem Plasma Process

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The influence of solvent type on splat formation and coating microstructure using the Solution Precursor Plasma Spray process was studied. Droplet with a high surface tension and high boiling point solvent experiences incomplete solvent evaporation process in the plasma jet leading to a porous coating. Droplet created from a low surface tension and low boiling point solvent undergoes rapid solvent evaporation, solute precipitation, pyrolysis, melting process in the plasma jet and forms splat upon impacting on the substrate; the build-up of splats results in a dense coating.

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Section: Discussionmentioning

confidence: 99%

“…Solution Precursor Plasma Spray (SPPS) process has been successfully developed to deposit YSZ-based TBCs with excellent durability as well as to deposit dense coatings [1][2][3][4][5][6][7]. In the SPPS process, an aqueous solution precursor, instead of the conventional powder feedstock, is injected into the plasma jet.…”

Section: Introductionmentioning

confidence: 99%

The Solution Precursor Plasma Spray Coatings: Influence of Solvent Type

Chen

Jordan

Gell

2009

Plasma Chem Plasma Process

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“…Thermal barrier coatings (TBCs) have been used to prolong the life of gas turbine for more than three decades, for these coatings play an important part in insulating engine blades from high temperatures of combustion chambers (Ref [1][2][3][4]. A typical duplex TBC system consists of a thermally insulating ceramic and oxidation-resistant metallic bond coat applied over the metal substrate.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Exposure on Mechanical Properties of a Plasma-Sprayed Nanostructured Thermal Barrier Coating

et al. 2011

J Therm Spray Tech

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A nanostructured thermal barrier coating (TBC) was deposited by air plasma spraying. The effect of microstructural evolution on nano-hardness and YoungÕs modulus has been investigated by nanoindentation technique after exposure at 1200°C in air for different times. The results showed that the sintering process of nanostructured TBC at 1200°C was divided into two stages. TBC completely kept the nanostructure with the grain size <100 nm at the first stage of 10 h thermal exposure. The nanostructure was lost gradually at the second stage from 10 to 200 h thermal exposure. During the first stage, nano-hardness and YoungÕs modulus increased rapidly for TBC densification, and Weibull bimodal distribution of both YoungÕs modulus and nano-hardness disappeared as grain grew and most microcracks were healed. The structure of TBC did not change basically, and nano-hardness and YoungÕs modulus increased slightly at the second stage.

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“…One such example is the suspension or solution precursor plasma spray (SPS or SPPS) process which has been used to create TBCs with novel microstructures exhibiting columnar structures similar to that of EB-PVD-deposited TBCs (Ref [17][18][19]. The SPS process can be an economical alternative to EB-PVD for TBC deposition where relatively thin TBCs (~250 lm thick) are needed.…”

Section: Developments In Coating Equipmentmentioning

confidence: 99%

Advances in Thermal Spray Coatings for Gas Turbines and Energy Generation: A Review

Hardwicke¹,

Lau²

2013

J Therm Spray Tech

248

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Functional coatings are widely used in energy generation equipment in industries such as renewables, oil and gas, propulsion engines, and gas turbines. Intelligent thermal spray processing is vital in many of these areas for efficient manufacturing. Advanced thermal spray coating applications include thermal management, wear, oxidation, corrosion resistance, sealing systems, vibration and sound absorbance, and component repair. This paper reviews the current status of materials, equipment, processing, and propertiesÕ aspects for key coatings in the energy industry, especially the developments in large-scale gas turbines. In addition to the most recent industrial advances in thermal spray technologies, future technical needs are also highlighted.

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Formation of vertical cracks in solution-precursor plasma-sprayed thermal barrier coatings

Cited by 90 publications

References 10 publications

The Solution Precursor Plasma Spray Coatings: Influence of Solvent Type

The Solution Precursor Plasma Spray Coatings: Influence of Solvent Type

Effect of Thermal Exposure on Mechanical Properties of a Plasma-Sprayed Nanostructured Thermal Barrier Coating

Advances in Thermal Spray Coatings for Gas Turbines and Energy Generation: A Review

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