Study of the Evolution of the Residual Stresses in Thermal Barrier Coatings from Manufacturing to Its Operation Work

Residual stresses’ magnitude generated by deposition, quenching stress, thermal stress operation temperature, and infiltration in the barrier coating (TBC) of gas turbines was determined. A manufactured deposition two layers, CoNiCrAlY yttria-stabilized zirconia (YSZ), on an AISI 304 stainless steel substrate. The deposited using HVOF gun YSZ atmospheric plasma spray (APS). TBCs were heat-treated at 1250 °C, with a CMAS (CaO, MgO, Al2O3, SiO2) attack concentration 10 mg/cm2 for 6 h order to evaluate evolution state residual stresses high temperature. determined employing modified layer removal method duplex coatings (MLRMDC), ANSYS Version R19.2, equations proposed Noda et al. In YSZ, total maximum 139 MPa compression, CoNiCrAlY, 214 compression. factor that has largest effect YSZ.