Plasma Spray Process Integration

Boulos, Maher I.; Fauchais, Pierre; Henne, R.; Pfender, E.

doi:10.1007/978-3-030-84936-8_33

Cited by 1 publication

(2 citation statements)

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“…6.1.4. The results of the mechanical adhesion strength test for the coating layers Figure (8) shows the relationship between each of the adhesion strength and the reinforcement percentages with different manganese metal before and after heat treatment. Before sintering, there is a gradual increase in adhesion strength, ranging from 22-44 MPa, with a strengthening range of 3%-15%.…”

Section: Thermal Conductivity Testmentioning

confidence: 99%

“…When the distance between the coating gun and the paint's base is substantial, the low temperatures encountered by the droplets result in their freezing before reaching the steel base. Consequently, this freezing and cooling procedure detrimentally affects the characteristics and advantages of the coating, resulting in surface fractures and an elevated occurrence of pores [6][7][8]. If the thermal coating is uneven, with more thickness in the middle and weaker edges, it can lead to molten droplets falling due to the high temperature [9].…”

Section: Introductionmentioning

confidence: 99%

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Production of a double cermet coating to treatment of the turbine blades

Antar,

Darweesh,

Ridha

2024

Eng. Res. Express

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Turbine blades often experience external failures, such as cracks and high pores, during operation. To address these issues, a method known as thermal spraying by flame is employed to apply cermet materials consisting of metal and ceramics onto the blades. The process involved incorporating manganese (Mn) into a chromium oxide (Cr2O3) base in varying proportions (3,6,9,12,15)%. Prior to this, the two mixtures underwent several preparatory steps, including being mixed with a micro-mill for two hours and then dried at 80°C for thirty minutes to remove any moisture present in the laboratory. The coating bases were prepared from an out-of-service turbine bit and shaped into squares with a side length of 1cm. The bases were then roughened and indented using a paint gun. The resulting models were sintered at a temperature of 1000°C for two hours. A number of structural and physical tests were carried out for the painted models before and after thermal sintering. Scanning electron microscope tests revealed crystalline regularity and lattice consistency of the outer surface especially at 15%Mn. Regarding the findings of the actual density, it was observed that the inclusion of manganese leads to a gradual enhancement in density with each subsequent addition. However, there was a consistent decrease in real porosity and water absorption, resulting in lower values at 15%. The hardness and adhesion strength exhibited significant improvements, increasing by approximately 15%. Conversely, the addition of the stiffener led to a continuous decrease in thermal conductivity. Thus, it was determined that the optimal coating parameters for achieving favorable outcomes were a coating distance of 16cm, a coating angle of 90°, and thermal sintering at 1000°C.

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Section: Thermal Conductivity Testmentioning

confidence: 99%