Comparative Investigation on the Mechanical Properties of Thermal Barrier Coatings Made by Atmospheric Plasma Spaying and Suspension Plasma Spraying

This work investigates the fundamental mechanical properties of SPS and APS thermal barrier coatings. SPS YSZ coatings had lower Young’s modulus values and higher interfacial toughness than APS deposited layers. The low stiffness of SPS coatings limits the elastic energy that can be stored in ceramic layers. This coupled with good interfacial toughness might make SPS deposited thermal barrier coatings less prone to delamination due to thermal cycling.