High Temperature Solid Particle Erosion Comparison of Atmospheric Plasma Sprayed MCrAlY Coatings

2021 ◽  
Author(s):  
musa demirci ◽  
MEHMET BAGCI
Keyword(s):  
High Temperature ◽  
Solid Particle ◽  
Atmospheric Plasma ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Mcraly Coatings ◽  
Plasma Sprayed

High temperature solid particle erosion behaviour of SS 316L and thermal sprayed WC-Cr3C2–Ni coatings

Wear ◽  
2020 ◽  
Vol 462-463 ◽  
pp. 203520
Author(s):  
Digvijay G. Bhosale ◽  
T. Ram Prabhu ◽  
Walmik S. Rathod ◽  
Manik A. Patil ◽  
Sanjay W. Rukhande
Keyword(s):  
High Temperature ◽  
Solid Particle ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Erosion Behaviour

Intersplat Oxidation of Atmospheric Plasma Sprayed MCrAlY Coatings

2014 ◽  
Author(s):  
Robert Eriksson ◽  
Kang Yuan ◽  
Sten Johansson ◽  
Ru Lin Peng
Keyword(s):  
High Temperature ◽  
Gas Turbines ◽  
Surface Oxidation ◽  
Atmospheric Plasma ◽  
Mcraly Coatings ◽  
Surface Oxides ◽  
Structural Parts ◽  
Lower Temperature ◽  
Temperature Exposure ◽  
Plasma Sprayed

MCrAlY coatings and thermal barrier coatings (TBC) are commonly used in gas turbines to prolong the life of structural parts. The atmospheric plasma spray (APS) process yields coatings with a typical splat-on-splat structure which oxidizes at intersplat boundaries during high-temperature exposure. A study was performed to establish the influence of intersplat oxidation on Al depletion. It was found that the β-depletion based life may be overestimated by a factor of 1.8–18 if intersplat oxidation is not considered. Two different mechanisms of intersplat oxidation were observed: At high temperature (1050 °C), a fraction of the intersplat boundaries remained in contact with the coating surface and oxidized with the same kinetics as the surface oxides. At lower temperature (900 °C), intersplat oxidation occurred by considerable slower growth rates than surface oxidation. The mechanisms behind intersplat oxide growth was further studied by O diffusion calculations.

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