Erosion mechanisms of thermally sprayed coatings with multiple phases

Effect of heat treatment on deformation and mechanical properties of 8 mol% yttria-stabilized zirconia by Berkovich nanoindentation

“…In particular, the top ceramic coatings have been applied to reduce the surface temperature of turbine blades, control on-demand air-cooling, and thus extend TBC service life, and improve aero-engine efficiency. However, TBCs are susceptible to various life limiting issues associated with their operating environment conditions including erosion [9][10][11], corrosion [12,13], oxidation [14,15], sintering [3,16,17], and foreign object damage (FOD) [18,19].…”

“…In particular, the ingestion process leads to thin the TBC thickness, reduce the insulation ability and increase the TGO growth rate [11,20]. Moreover, small particle erosion can result in the coating failure by the propagation of elastic stress waves.…”

Simulation of Erosion by Particle Impact on a Rough Surface

“…This is very serious problem in gas turbines, pumps, thermal exchangers, and blades of helicopters, which causes premature failure and decreases service life of components [3][4][5][6][7]. There are three different ways to solve this issue; first, using of filtering systems to screen erodent particles for compressor of aircraft gas turbine engine.…”

“…But due to limited knowledge about their failure mechanisms during particle impact, their performances are not sufficient [5]. Thus, every research that works on a solution of surface architecture to combat erosion requires to be based on thorough analysis of damage mechanisms caused by solid particles impact [2,3,[5][6][7]11].…”

“…The effective parameters affecting erosion are mechanical property of coating and substrate and also particle parameters [2,3,[5][6][7]. Particle parameters include size [13][14][15][16][17], velocity [15,17], impact angle [2,6], density [14], shape [3], mechanical property [15], and impact location [17].…”