Thermomechanical Durability of YSZ Thermal Barrier Coatings Deposited on Wrought and Additively Manufactured Nickel Base Superalloy Substrates

In this work, the thermomechanical performance of yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBC) deposited on additively manufactured (AM) 718 nickel superalloy substrates is evaluated. Another TBC system applied to the wrought 718 substrate is fabricated for comparison. The bond coat is NiCrAlY. For thermomechanical durability studies, both furnace thermal cycling (FCT) and thermal shock (TS) tests are employed to determine the number of cycles to failure for both systems. The results of thermomechanical testing and microstructural analyses are presented.