Effect of particle size distribution width on repeatability of coating characteristics in atmospheric plasma spraying

Hudomalj, Uroš; Sichani, Ehsan Fallahi; Weiss, Lukáš; Nabavi, Majid; Wegener, Konrad

doi:10.1016/j.procir.2022.09.180

Procedia CIRP

2022

DOI: 10.1016/j.procir.2022.09.180

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Effect of particle size distribution width on repeatability of coating characteristics in atmospheric plasma spraying

Uroš Hudomalj

Ehsan Fallahi Sichani

Lukáš Weiss

et al.

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2024

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Cited by 2 publications

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High temperature infiltration behavior and reaction characteristics of Colima volcanic ashes on gadolinium zirconate coatings deposited by atmospheric plasma spraying

Bedoya-Trujillo,

Gutiérrez-Pérez,

Pérez

et al. 2024

emergent mater.

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Volcanic ashes are considered a serious threat to the aircraft industry. At high temperatures, they inflict severe thermochemical damage to the typical 7 wt.% yttria-stabilized zirconia thermal barrier coatings that protect the aircraft turbine. There is a need to evaluate alternative materials with excellent resistance to infiltration of molten siliceous particles, such as gadolinium zirconate. In this work, free-standing thermal barrier coatings of gadolinium zirconate were manufactured by atmospheric plasma spraying, varying deposit parameters to obtain different relative densities to evaluate the infiltration of molten Colima volcanic ashes for 1 h and 10 h at 1250 °C. The infiltration depth and the reaction products resulting from each interaction, were studied by different characterization techniques. In general, the coatings show high resistance to the infiltration of the volcanic ashes, reaching infiltration depths between 50 µm and 80 µm after 10 h of infiltration time. In this sense, gadolinium zirconate coatings are excellent candidates against the infiltration of Colima volcanic ashes compared to the typical yttria-stabilized zirconia-based thermal barrier coatings.

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High temperature infiltration behavior and reaction characteristics of Colima volcanic ashes on gadolinium zirconate coatings deposited by atmospheric plasma spraying

Bedoya-Trujillo,

Gutiérrez-Pérez,

Pérez

et al. 2024

emergent mater.

View full text Add to dashboard Cite

show abstract

Optimizing the properties of nano WC-10Co-4Cr HVOF coatings by using RSM

Basiri,

Mosallaee

2024

Surface Engineering

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One of the limitations of using tungsten carbide nanoparticles in the HVOF coating method is decarburization of these particles during the coating operation. These unwanted changes lead to severe drop in coating properties. Optimized effective HVOF parameters is one of the solutions to control this issue. In this article, HVOF effective parameters (oxygen flow rate, powder flow rate and spray distance) were optimized using RSM (response surface methodology) to control this phenomenon and achieve optimum hardness, deviation of hardness and bending strength. The results showed that oxygen flow rate has the greatest effect on hardness and hardness deviation, while spray distance has the most influence on bending strength. In order to obtain optimal properties, in oxygen flow rate: 858 lit/min, distance: 34 cm and powder flow rate: 82 gr/min, the highest hardness (>1270HV0.1) and strength (cracking bending angle <80 degrees) and the lowest hardness deviation (<17HV0.1) reached with more than 92% probability. The validity of the results was confirmed by using XRD analysis. The validation results confirmed the coating properties and RSM model.

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Effect of particle size distribution width on repeatability of coating characteristics in atmospheric plasma spraying

Cited by 2 publications

References 10 publications

High temperature infiltration behavior and reaction characteristics of Colima volcanic ashes on gadolinium zirconate coatings deposited by atmospheric plasma spraying

High temperature infiltration behavior and reaction characteristics of Colima volcanic ashes on gadolinium zirconate coatings deposited by atmospheric plasma spraying

Optimizing the properties of nano WC-10Co-4Cr HVOF coatings by using RSM

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