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Damage behavior of air-plasma-sprayed thermal barrier coatings under foreign object impact

2003-10-01
Dericioğlu, Arcan Fehmi
Zhu, S
Kagawa, Y
Kasano, H
How do thermal barrier coatings react to the impact of a foreign object? The authors examined the damage done by a projectile to an air‐plasma‐sprayed coating system. Apart from permanent deformation, chipping of the ceramic top coat around the impression sites occurs at impact velocities above 150 m s–1. At increasing impact speed, the cracks in the top coat tend to elongate and result in coating removal (see Figure for a cross‐section).