High Speed PVD Thermal Barrier Coatings

Abstract

The high speed PVD process (HS‐PVD) combines gas phase coating synthesis with high deposition rates. The process has been demonstrated for high purity YSZ deposited as a chemically bonded top thermal barrier with columnar structure of EB‐PVD features. The process can manufacture EB‐PVD like coatings that match in regards to their TGO‐formation and columnar structure. Coatings with a columnar structure formed by individual columns of 1/4 of the diameter of a classical EB‐PVD type TBC have been deposited. These coatings have the potential to prove a significant reduction in thermal conductivity and in erosion performance.